Master Bearing Race & Seal Driver ( Adjustable ) - bearing driver

2024-09-05 21:19:23

Bestbikegrease

Having explained grease type division in paragraph 3, this paragraph explains some produced and available greases, as combinations of thickeners, base oils and (sometimes) additives. As will be seen, thickener type is usually what gives a grease it’s name, with additives (especially in case of solid lubricants) noted as an appendix.

Cylindrical Roller Bearings are great for applications with heavy radial loads and high speeds. These bearings offer high stiffness, low friction and long service life, making them ideal for a variety of applications. In Sealed Bearings, the rollers are protected from contaminants, water and dust, while providing lubricant retention and contaminant exclusion, providing lower friction and longer service life. Split bearings are intended primarily for bearing arrangements which are difficult to access, such as crank shafts, where they simplify maintenance and replacements.

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■Features: Designed so that the raceway surfaces of the inner and outer rings and the apex of the conical surface of the rollers meet at one point on the center line of the bearing, these bearings are suitable for applications where heavy loads or impact loads are applied. They can support axial load in one direction, as well as radial load.

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All the information provided in this article, as well as on all of my websites, is to be taken as: “to the best of my knowledge”, or “as far as I know”. I have consulted experts of various fields (and still do), including mechanical engineers, especially when writing on this, rather “can-of-worms” topic, and info provided on my websites does agree with my practical experience, but it still is my opinion – based on my knowledge, education and experience. Different people, including experts, have different experiences and, often, different opinions. I’m sure there are, and will be, people who completely, or partially disagree. Even more often – there is and will be data (experiments, statistics, publications etc.) that might contradict, or seem to contradict my work when read/interpreted by a non expert. All of this is normal and to be expected.

Marketing name for basic, very cheap calcium grease. Slightly lower working temperature range than “ordinary” calcium grease, so not best used for bicycle bearings, but it will do in a pinch.

I would like to find out whether lithium or calcium complex grease works best for a range of applications: my bicycle, car, and motorcycle. Your article is really helpful as I have chosen to buy lithium complex grease.

Best grease for bicycle bearingsshimano

• Specification: Standard• Outer Ring: With Outer Ring• Load Direction: Radial• Precision Ji: Class 0• Raceway Ring Shape: Needle Roller

“Usual characteristics” in the heading is written because various manufacturers (and concrete grease models) use various ingredient qualities, so final product characteristics may vary. Concrete characteristics a finished grease possesses is usually written on the label, either in the form of a marketing slogan, or (more reliably) by noting DIN and/or ISO standard that a grease complies with. Characteristics like lowest and highest use temperature, water washout resistance etc.

Motorex BikeGrease2000

Having said that – I think I’ve provided enough information for everyone to make a choice for themselves and by themselves.

The thing with data and science is that it actually needs to be relevant to the conversation and support what you’re arguing. You can’t just grab the first thing that pops up in a google search and say “SEE!!” that doesn’t make you scientific, data-based, or objective.

Personally I just use whatever grease I have open, which at the moment is either Mobil1 Synthetic lithium or some generic lithium marine grease. I also have a tube of Super Lube silicone grease for o-rings but not for bearings. I don’t currently have any suspension but if I did I’d pick up some Slickoleum which is about the only brand name I’d go out of my way for.

Greases without a soap. Thickener is amorphous fumed silica. Silica greases posses good oxidation resistance and thermal stability, good resistance to water and acid washout, while their hardness doesn’t change with the change of temperature. Because of a high production price and limited high load bearing capacity, silica greases are limited to high temperature grease use.

PTFE is usually added to lithium grease. These greases differ from “teflon” greases, where PTFE is used as a thickener (with a synthetic base oil usually), not as an additive. PTFE improves grease performance with high speeds (measured in thousands of revolutions per minute). With greases for lubing bicycle bearings, PTFE as an additive needlessly increases grease price, but doesn’t harm (nor does it benefit) grease’s performance (not even in theory).

Main advantages of PTFE are low friction coefficient and wide range of working temperatures, from -200 °C to +250 °C. Disadvantages are a higher price and inability to bear high loads.

[Structure and features]· Because this cross roller ring has a 90° V-groove shape with a rolling cylinder spacer retainer passing through the rotating surface in a mutual orthogonal arrangement, it can support all kinds of loads such as radial loads, axial loads, and moment loads with a single bearing. The outer ring measurements are minimized and compacted, but it still maintains high rigidity. For this reason, it is optimal for a variety of applications such as manufacturing robot joints and turning parts, machining center turning tables, manipulator rotating parts, precision rotary tables, medical equipment, measurement equipment, and IC manufacturing equipment.· [Types and features]· The RB shape features an outer ring divided into two parts and a single-piece inner ring structure, the basic format for a cross roller ring. Used in areas where inner ring rotation accuracy is required.· Used for applications such as index table rotating parts for manufacturing machinery.

Now that grease types and solid lubricant (additives) types have been explained, it is clear that there are numerous possible combinations. For the purpose of re-lubing an already lubed bearing, if completely washing out old grease is not possible/practical, it is important to know which greases (with which additives) are compatible (i.e. can be mixed) with which greases.

They are widely used and available. Basic calcium greases have low price. Calcium thickener provides the grease with an excellent water resistance. These greases have a relatively narrow working temperature range. I.e. if bicycle is ridden below -20 °C, or it stays in hot summer sun before riding (over +35 °C), then they are not the best choice.

Coauthor:Stevan Dimitrijević (dr of metallurgical engineering)Author of the greatest site (blog) in serbo-croatian language about motor oils and lubricants:https://motornaulja.blogspot.rs/

Note: listed greases are the ones I could find that are of good quality and with a world-wide distribution. Feel free to look for cheaper, locally available options. My 1st choice is local, Serbian made FAM FORPLEX 2 grease.

Above a certain point, the differences with one thickener vs another is going to be marginal, especially in light of the finished product that we can actually buy. Lithium is “best” because if you walk into any store that’s what you’ll likely see, and if they have a good selection, half of that selection is going to be lithium based. Similarly, walk in to any store and you’re going to see NLGI #2. You want #1, you need to special order it. The lithium being widely available might soon change due to global economic demand for lithium in other products, but for now, it’s what you’ll typically see. Unless you are rebuilding suspension, or a freehub, it’s good enough and thus recommended as a general purpose grease. I could wax poetic about my specific preferences for specific work (which would include NLGI #1 for my winter build) but that was never the point.

• Specification: Standard• Outer Ring: With Outer Ring• Load Direction: Radial• Raceway Ring Shape: Needle Roller• Inner/Outer Ring Material: Steel

Tapered roller bearings utilize conical rollers and raceways, arranged so that the rollers and raceways meet at a common apex. The rollers are guided by contact between the large end of the roller and a rib on the inner ring. This provides high capacity for radial and single thrust loads.NTN's pioneering efforts in developing crowned rollers have resulted in greater load-carrying capability and longer bearing life. Crowned rollers under load distribute stress equally along their full length of contact with the raceways, thereby eliminating stress concentration at the roller ends. This design concept also compensates for minor misalignment between shaft and housing bore and deflection under load, thereby reducing stress concentration.

The existing comments posted under this article (questions and answers) have been moved to this BikeGremlin forum thread:https://www.bikegremlin.net/threads/bicycle-bearing-greases-explained-article-comments.105/

Special types of “bicycle grease”, sold in many bike shops, or on-line rarely have a label noting standards it satisfies, often even don’t have fully and clearly listed ingredients. It’s up to the buyer to trust the manufacturer that it is the best grease for a bicycle. I’m yet to do lab testing of “special bicycle greases”, but when I do – they’d still have to be really, really exceptional to justify the price difference from a regular car-store sold lithium soap based grease, that fully satisfies all the criteria.

Greases where PTFE isn’t an additive, but a soap (or combination of PFTE/PFPE soaps), that keeps base oil in suspension. Harder to find, more expensive, less compatible to mixing with other commonly used greases (see paragraph 6.). Apart from that, characteristics are good for lubricating bicycle bearings.

Solid lubricant is a material used as a dust, or a thin film layer, to protect adjacent sliding surfaces and reduce wear and friction during their relative movement. In practice, solid lubricants are often suspended in oils, or added to greases (see 3.2.3. special greases).

According to international standard ISO 6743-9, greases are divided per intended use conditions. Example of an ISO label:ISO 6743-9: ISO-L-XCCHA 2Meaning of each letter is given in table 3.

IKO Machined Type Needle Roller Bearings have an outer ring made by machining, heat treatment, and grinding. The outer ring has stable high rigidity and can be easily used even for light alloy housings.These bearings are available in metric series and inch series, both of which have the caged type and the full complement type. It is therefore possible to select a suitable bearing for use under various conditions such as heavy loads and high-speed or low-speed rotations. In addition, there are bearings with and without an inner ring. As the type without inner ring uses a shaft as the raceway surface, a compact design is possible.

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People’s reactions to this particular article seem to range from taking it as a gospel, to taking it as blasphemy. Still – it is no more, and no less than: “what I have learned (through theory and practice) so far”. And, like all the other articles, it gets updated as new knowledge is acquired.

Not to be confused with aluminium anti seize pastes. Similar to lithium greases, with better water resistance (similar to calcium greases), but with a significantly higher price.

Combination of complex lithium and calcium soaps thickeners. With quality base oils these greases can be made to be superior to complex (even more so compared to ordinary) whether lithium, or calcium greases. They are less easily available and higher priced though – with no measurable benefits for use in bicycle bearings compared to quality lithium soap based greases.

■Features: As a bearing with an outer ring, it has the lowest cross-sectional height, enabling space saving and cost reduction.

I suspect Mr. Reason is just obsessed with buying grease with “bicycle” written on the label and feels the need to defend themselves. Who argues for polyurea? Only someone with limited experience with it… the Park Poly formula is good, highly compatible, but it’s the exception not the rule. It’s usually a grease used in high speed bearings that are sealed and never serviced. Why do they choose it for a bicycle? I have no clue, but the fact that they use it for their general purpose grease doesn’t make it better than a lithium complex. For as much as Mr. Reason demands evidence, they certainly didn’t make much of an argument besides “but that’s what this company does although I have no idea why!!!” (how informative, not).

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Graphite is added to a grease as a solid lubricant, to improve extremely high load bearing characteristics. It is usually combined with calcium, or aluminium greases. Bearing extremely high loads is completely needless attribute for a bicycle bearing grease. You will needlessly pay more, with no measurable practical (or even theoretical) benefits.

Cylindrical roller bearings are suitable for applications involving high-speed rotation because the friction between the rolling elements and the flange of the track wheel is small. Products on this page: N type

If you've found any errors or lacking information in the article(s) - please let me know by commenting on the BikeGremlin forum.You can comment anonymously (by registering with any name/nickname), but I think it is good to publicly document all the article additions (and especially corrections) - even if their author chooses to remain anonymous.

• Specification: Standard• Standard Size: Metric Series• Width Dimension B (mm): 2• Outer Ring: With Outer Ring• Load Direction: Thrust

Even though thickener is what most often gives a grease it’s name (e.g. lithium grease, calcium grease etc), base oil is what does the actual lubrication and usually makes for over 80% of the grease volume. Greases can be divided according to the following criteria:

Criterion 1 – Good functioning in a temperature range of -20 to +80 °C. Greases shouldn’t become too hard at the lower, nor become liquid at higher use temperatures. As will be explained, greases that fulfil this criteria need to have a dropping point of at least +100 °C (for hot climates better +120 °C), and the lowest operating temperature (“use temperature” in the remainder of this text) of at least -20 (for cold climate cycling preferably -30 °C).

Similarly to graphite additive greases (5.3.), excellent for high pressures and temperatures, with no negative impact on bicycle bearings. So lithium, or calcium greases with MoS2 won’t be bad for bicycle bearings, just needlessly expensive.

Relja is an avid cyclist, a pretty good bike mechanic, and a professional computer systems administrator – with decades of experience in both those fields (computers and bikes ? ). Relja Novović’s credentials and a short biography

True, proper maintenance is more important than lubricant, but good bike grease is relatively inexpensive & a big can lasts forever. Why skimp? You’re only saving a few crumbs.

Those bearings need to cope with the load of under 200 kilograms (usually). The load is dynamic, so that impacts can drastically change the volume. However, due to the low weight of a bicycle, only human strength of it’s rider, as well as the fact that a bicycle carries a maximum of two people (specially designed tandems), the forces that occur and bearing loads are relatively small compared to similar in cars, motorcycles, or industrial machinery.

Note: for mounting things (bolts, seatposts, handlebars etc.) – that is for things that are not made to slide when used, many people use grease, while it is preferable to use anti-seize / mounting pastes (as explained in that linked article). This post deals with greases in terms of lubrication primarily.

Most widely used grease type. Widely available, at a low price. Fulfills all the criteria a bicycle bearing grease should satisfy. Water and rust resistance is not as good as that of calcium greases, but it is more than good enough for bicycle bearing application. Wider use temperature range than similar calcium greases. In case of high quality synthetic base oils, temperature range is even greater, though this raises the price significantly, without much measurable benefits for use with bicycle bearings. Perhaps for extreme (-40 °C cold) uses.

The last link in the above comment, from Jtekt. You’re takeaway is “polyurea is just a superior grease.” It doesn’t say that anywhere in the article. Superior is subjective… superior for what specific use? Per that article it is superior in the reciprocating sliding friction tester. Anything else? Who knows; that was the only direct comparison. Clearly Urea without any additives is superior to Lithium (at least in this specific test), no argument there… but we don’t buy grease without additives, we buy a manufactured product designed to minimize the shortcomings and maximize the strengths, so the data is useless other than to show the importance of additives with a lithium formulation. With the right additive, they had similar curves. So sure, not all lithium greases are equal… but that’s not the point you were attempting to make here.

Same as lithium complex greases with EP (extreme pressure) additives. In fact, lithium complex greases are almost impossible to find manufactured without EP additives. These additives are not needed for bicycle bearing use. With greases, all that is not needed is usually harmful, but in this particular case, no measurable harm comes from the EP additives. They can increase corrosion of coloured metals and silver, but with steel bicycle bearings they are mostly harmless™. Better without them, but no problems with them.

Note:Mark 2 in table 4 is used only if a grease has some of the ingredients/properties listed in that column – otherwise, the mark is omitted.See the “Bike greases questions” discussion on the BikeGremlin forum for a bit more details on this.

You’re comparing apples to oranges using that study as supporting evidence, because the formulations used were made specifically for the purpose of the study, not for real world use. Throw a commercial product through the same exact testing and you may get entirely different numbers for both aluminum thickener and lithium thickener formulations… but again, WE DON’T KNOW. Don’t be so high and mighty about how you are so evidence based when your argument is this easy to pick apart.

Quotation marks because it actually is an anti-seize (mounting paste) compound. This “grease” is used for high temperatures – lubing sliders of disc brakes, where lots of heat is generated when braking. It is also perfect for preventing parts from seizing together – perfect for lubing seat post, all the bolts and nuts, bottom bracket threads – it will prevent metal from binding together, but not be too slippery to ask for a lot more torque when screwing in. As an anti seize it is one of the most effective products. However, for bearings themselves, it is too hard, to thick.

IKO Crossed Roller Bearigns are compact bearigns with their rollers alternatively crossed at right angles to each other between inner and outer rings. The rollres make line-contact with raceway surfaces, and, therefore, elastic deformation due to bearing loads is very small. They can take loads from any directions at the same time such as radial, thrust and moment loads. It is possible to make your design compact comparing to the usage of taper roller bearing and combination of two ball bearings. These bearrings are widely used in the rotating parts of industrial robots, machine tools, medical equipment, etc., which require compactness, high rigidity and high rotational accuracy.

In plain English, grease is held at a temperature of 25 °C. It is well meshed (standard prescribes 60 meshing cycles). Then the surface is put in a container, top surface is smoothed over, and a cone shaped plunger is slowly placed from the top to dig into the grease with it’s own weight. Diameter of the hole imprinted by the cone is then measured in tenths of a millimeter. Standard is shown in table 2.

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Great writeup! Somehow never stumbled upon this particular page before. For what it’s worth, I agree that “Reason” is just a troll and not being remotely constructive. I’ve easily spent 100+ hours on Machinerylubrication(dot)com as well as the Bobistheoilguy forums and love to nerd out on grease… also was a nuclear/steam plant mechanic long before I was a bicycle mechanic. I think you put together a great summary. I can’t vouch for every word written but I trust that you vetted your sources and the info is accurate (nothing stands out as incorrect to me). You also made it quite clear what was opinion vs standard industry practice.

A few things I’d add to this article… a discussion on how grease itself is like a sponge for the oil, that can soak it back up and release it. Grease itself doesn’t lubricate, the oil lubricates and I think that is lost on a lot of people; the purpose of grease is just to hold it which you touch on when you discuss oil but I think this could be emphasized more. This leads into another aspect of grease that you didn’t discuss, which is how much do you pack into a bearing. Industry standard seems to be about 1/3 to 1/2 of the free space.. beyond that there’s a point of diminishing return in terms of rolling efficiency where instead of having a set path, the bearing balls have to constantly do work pushing the grease out of the way similar to what a snow plow does. This often leads to the bearing balls sliding along the races rather than actually rolling which is less efficient and can lead to premature wear and flat spots. It can be argued that less is more, from a performance perspective. On the other hand, over packing as much grease as possible does help with weather proofing and preventing water ingress so it’s a tradeoff (isn’t everything).

Perhaps one of the referenced studies in the linked study would provide more information but I’m just evaluating what you linked. And frankly, it doesn’t actually state what you imply that it states/proves. This isn’t an argument against polyurea, it’s well known to be a great grease when you need a “sealed for life” application so it would be a good choice on non-serviceable bicycle bearings for that reason. But it’s also a fairly incompatible grease, Park’s formulation being an exception, presumably. So if you use it, then make sure to clean out all the old grease first. But superior? Why? Because Park uses it? Because it’s better in a given test without additives (ignoring incompatibility issues)?

Grease used for (and marketed as) boat trailer wheel bearing lubrication. Bearings that need to be submerged into sea water when boats are put into the sea. Very good corrosion and water washout resistance. Use temperature range is similar to ordinary calcium greases (if it is complex, then like complex calcium greases). Relatively low price (similar to calcium, or complex calcium greases).

Best grease for bicycle bearingsreddit

Maybe aluminum actually is a better lubricant, and this would be one data point to that end. But how does it compare to different formulations, it’s a really bad idea to generalize a type of grease when a specific product may be completely different than another even with the same thickener. You have a hypothesis to test, but the study in question doesn’t test it.

Bike bearinggreasealternative

If you have any questions (or additions and corrections), please use the BikeGremlin forum – this is the forum topic related to this article:https://www.bikegremlin.net/threads/bike-greases-questions.64/

Silicone oils suspended in a soap of lithium, calcium, PTFE, fumed silica etc. Lithium soap based silicone greases have excellent properties for lubricating bicycle bearings, but are outrageously expensive. Because there are greases that cost a lot less, while being good enough, and because it makes no sense for lubrication after a few seasons to cost more than a new bearing, silicone greases are not an optimal choice.

Author’s recommendation of greases from Amazon.com on-line shop (clicking on an image below opens Amazon affiliate link for on-line shopping). As an Amazon Associate I earn from qualifying purchases.

Update, December 2023:Grease I’ve been using mostly over the past year is Motorex 2000 grease (also sold as “Motorex Bike grease”). Why? It is “officially” (by the manufacturer’s specifications) neutral towards plastic and many kinds of rubber (not to be used on DOT for brake rubber seals though). And it has a nice colour, but is mostly transparent, so I can easily see where and how much I’ve applied. ? It is needlessly expensive for what I’m getting, but since I often work on other people’s bikes, and bikes are getting more and more plastic and carbon parts, I want to minimize any liability. This grease is calcium based.

Somewhat improved characteristics than ordinary calcium greases. They usually have a higher maximal working temperature (check the label) so they are good for extreme summer heats.

Criterion 7 – Low price. Out of two greases that both satisfy previously noted criteria, it makes sense to choose the cheaper one. It makes no sense for lubrication, in a medium term, to cost more than replacement of a bearing.

• Load Direction: Radial• Raceway Ring Shape: Cylindrical Roller• Inner/Outer Ring Material: Steel• Rolling Element Material: Steel• Combination Of Two Piece: Standard

Criterion 3 – Good resistance to water wash out and to water and dirt contamination. Per standard ISO 6743-9 at least level E, or better of water resistance. Bicycle bearings are usually not submerged into water, nor is water sprayed on them under pressure. That is why they don’t require water protection levels as some other bearings, e.g. boat trailer wheel bearings.

First there will be a few words about basic construction of bicycle bearings, lubrication requirements and types of loads that bicycle bearings take. Type of bearings and loads it takes are an important factor when selecting lubricants. Then basic characteristics of greases will be explained – in general, with standards for labelling greases explained (so that label can be understood when shopping for grease). Finally, an overview of most commercial greases types available, with advantages and disadvantages for bicycle bearing lubrication use. For simple, non-technical recommendations, look at this post: The best bicycle bearings grease. Related posts are explaininig: Bicycle hub overhaul procedure and Bicycle bearing types and designs.

As far as I know, those are decent-quality calcium-based greases, that are softer than NLGI2 hardness, not aggressive on plastics, rubber or metal.

SKF Tapered roller bearings accommodate combined loads and provide low friction during operation. By applying one single row tapered roller bearing against a second tapered roller bearing and applying a preload, a rigid bearing application can be achieved.

It is a common debate among cyclists (and mechanics) which is the best bicycle bearing grease – for use in hub, or steerer, brake pivot etc. bearings. Some swear by the old “axle grease” that “… my grandfather / father used …” Others recommend silicone, Teflon, graphite grease and so on. This post explains important characteristics of various greases in terms of lubricating bicycle bearings.

Bicyclewheel bearinggrease

After describing non soap greases with a non-organic thickener, it is time for an organic thickener one – polyurea. These are usually picked for their good high temperature characteristics (dropping point is over 260 °C). These greases have thixotropic properties (i.e. they soften when lubricated parts are moved, then harden back to original consistency when stationary).

IKO Combined Type Needle Roller Bearings arecombinations of a radial bearing and a thrust bearing.Caged needle roller bearings are used as radial bearings and thrust ball bearings or thrust roller bearingsare used as thrust bearings. They are compact andvery economical, and can be subjected to radial loadsand axial loads simultaneously.They are widely used for machine tools, textilemachinery, and industrial machiner

The mounting holes on both inner and outer rings eliminates the need for a special flange or housing and enables easy installation. Mounting has virtually no effect on performance, which ensures stable, accurate rotation and torque. Can be used for both outer and inner ring rotation.

Before grease divisions are given in detail, picture 1 might seem a bit unclear, but it will help for all the data to fall into place. Thickener type is what practically defines a grease type.

So the weight and the speed with which bicycle bearings are loaded are quite modest. While frequent re-lubrication is not practical.

The extremely small cross-sectional area allows it to be used in lightweight, compact devices. The integrated inner/outer ring structure can be used for both inner and outer ring rotation. There is a 5 mm thin type and an RA interchangeable type. The thin type product lineup starts at a micro-sized 10 mm inner diameter.

Greases are semi-solid lubricants, used when oils, or liquid lubricants are not appropriate. Either because of higher costs, or for technical reasons. As it was briefly mentioned in previous paragraph, bicycle bearing grease should fulfill the following criteria:

Since bikes are ridden outside, bearing lubricant needs to keep dirt and water from entering. It should be resistant to being washed off with water, prevent corrosion, while operating temperature ranges from as cold as -20 °C for winter use (though some cyclists are even more extreme), to about 100 °C for bearings of bikes left in hot summer sun, then ridden.

The main flaw when using these greases for bicycle bearing lubrication is it’s relatively higher price. Also, low compatibility with other greases can be a potential problem – in case of adding grease without previous complete washout of the existing grease.

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Before explaining grease types and properties, it needs to be said that there is no such thing as the best grease. There is only optimal choice grease. Optimal as best satisfying all the important criteria. For example: if a grease has best characteristics for lubricating bicycle bearings, but is outrageously expensive, it will not be an optimal choice as long as there is a significantly cheaper grease that has sufficiently good characteristics for the application.

I’ll steal his argument to support yours though, everyone uses NLGI#2 for a reason.. the only place you ever see NLGI#1 or “#1.5” in actual production is when it gets used in suspension forks. Which also happens to be why Slickoleum uses a calcium thickener, because lithium is not compatible with o-rings. Slick Honey and SRAM butter just being repackaged Slickoleum. The old Judy Butter from Rock Shox, before SRAM bought them up, was a lithium grease btw so obviously that particular lithium grease was ok with the seals Rock Shox used. Park HPG-1 is another lightweight grease that I’d consider a suspension grease (calcium sulfonate)and maybe a weightweenie grease if you repack your hubs frequently but not a long term “set and forget” sort of grease. I consider the NLGI #1 a high maintenance grease, although I haven’t had issues with washout or anything it’s just so hard to find that I don’t really consider it worthwhile unless you need a winter-specific grease that happens to be NLGI#1 with a good cold operating band (which most of us do not need). For summer riding, with wheel bearings, NLGI#2 makes the most sense, and industry supports that claim; there’s a reason that’s what most stores stock.

It should also be taken into consideration that the design of a bicycle wheel with a hub in the middle makes the lever by which the force is applied to the hub so large that the drag that hubs eventually produce is practically negligible. Especially when comparing the drag of oiled versus the drag produced by properly greased hubs. Even when each second counts, there are lots of other places where the time can be saved (both on the bike itself, as well as with the equipment), while the hubs should be the last thing to experiment on. Of course, everyone chooses by themselves, for themselves, but if hubs are lubricated with oil, it should be noted that this should be repeated every week, or every 500 kilometers ridden – whichever of the of the two comes first.

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So I read your last two links, because I was actually just bored and wanted to read them. The PSU study had to do with how the friction coefficient changes with temperature. You use the base of aluminum being 0.09 at room temperature vs lithium being 0.11 at room temperature as evidence that aluminum grease is somehow superior… perhaps it is, all else equal, but the researchers didn’t pull 10 different aluminum based grease formulations to compare and establish an average or standard because that wasn’t the point of the experiment; it would have been completely irrelevant to the experiment in question. So, you just cherry picked something completely out of context to “prove” your point but it doesn’t prove anything because that’s not what was being evaluated. Perhaps it was the isopropoxide that only the aluminum formulation used which was the difference maker; the other greases used hydroxide… you can’t rule that out because it wasn’t evaluated or controlled for, because that wasn’t the point of the experiment in question.

Tapered roller bearings are designed such that outer ring, inner ring and rollers have tapered surfaces whose apexes converge at a common point on the bearing axis. Along with metric series bearings, inch series bearings are also available. This type of bearing is suitable for applications that involve heavy or impact loading.Single-row tapered roller bearings.▪ Able to carry radial and axial load in one direction simultaneously. Because an axial component of force is produced when this type of bearing is loaded radially, two bearings are used together facing one another, or two or more bearings are matched and used.▪ There are the standard, medium and steep type which are different in contact angle size. Medium tapered metric series bearings are identified by the supplementary code "C" which is added as a suffix to bearing numbers.▪ Bearings whose outer ring width, outer ring small inside diameter and contact angle are determined in accordance with ISO 355 specifications are identified by the supplementary code "J" as a suffix.

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Would be useful to have some discussion on “carbon safe” as well as rubber o-ring safe and even plastic (grease for shifters) safe. Not that I blame you for not diving into that as there’s a lot of mixed opinion out there. Really that’s about the only reason I’d ever recommend someone buy a bicycle specific grease is that it may specifically guarantee compatibility while an automotive grease wouldn’t (which doesn’t mean it’s not compatible, it’s just not explicitly stated).

Molybdenum disulfide (MoS2). Like graphite, has low friction coefficient, but doesn’t need to absorb moisture to achieve it (moisture with MoS2 can even somewhat increase friction). Has higher load bearing capabilities than graphite. In environment with oxygen, it can be used for temperatures under 400 °C, while in a non-oxidant environment it is stable up to 1100 °C.

Some division criteria are “overlapping”, i.e. different types of base oil can be used with one type of thickener, in order to achieve different grease characteristics. For example, lithium soap based thickener can be used with either mineral, or synthetic base oils to achieve different grease characteristics. In addition to that, in either of the mentioned combinations, another additive can be combined, like molybdenum disulfide for example, in order (in this case) to improve grease’s resistance to extreme pressures, or (extremely) heavy loads.

If lithium grease is better & cheaper, why doesn’t Shimano ship their hubs with it? If lithium grease is better, why are sealed bearings lubed with polyurea? If lithium grease is better, why don’t major bike lube manufacturers sell it?

Exception where MoS2 greases are useful can be coaster hubs (hub brakes), where excellent heat resistance can help grease hold it’s own better. However, there are significantly cheaper, almost as good alternatives, like lithium complex greases.

These are high quality greases with excellent lubricating, water resistance, extreme pressure bearing and oxidation resistance properties.

Standard for labeling grease consistency is established by American non-profit, independent NLGI (National Lubricating Grease Institute) organization.

IKO Machined Type Needle Roller Bearings are bearings with a low sectional height and large load ratings. The outer ring has high rigidity and can easily be used even for light alloy housings. These bearings are available in metric series and inch series, both of which have the caged type and the full complement type. It is therefore possible to select a suitable bearing for use under various conditions such as heavy loads and high-speed or low-speed rotations. In addition, there are bearings with and without an inner ring. As the type without inner ring uses a shaft as the raceway surface, a compact design is possible.

Spherical roller bearings are designed for systems in which high loads must be supported and shaft flexing and misalignments compensated.

Needle roller bearings are a special type of roller bearing with cylindrical rollers that are small in diameter while still keeping a longer length. SKF supplies needle roller bearings in many different designs, series and in a wide range of sizes, which makes them appropriate for a wide variety of operating conditions and applications.

In this series, IKO needle roller bearings are combined with thrust roller bearings to receive thrust loads. Their axial load ratings are greater than those of bearings that are combined with thrust ball bearings. Also, plastic deformation of the rolling contact surfaces under load is minimal. Furthermore, the thrust bearing section is finished to high accuracy, and therefore high rotational accuracy is obtained in the case of both vertical and horizontal shafts. Like the needle roller bearings with thrust ball bearing, this series also includes bearings with a dust cover and bearings with an inner ring.

Ball bearing track rollers are self-retaining, single or double-row units with particularly thick-walled outer rings. In addition to high radial forces, these bearings can also support axial forces in both directions.

German DIN 51 502 standard for labeling greases, unlike ISO, with legendary German precision and efficiency sorts greases according to base oil types, additives etc, so there can be no confusion when choosing the appropriate grease for a given application. ? Example of a DIN label:DIN 51502: K2 K-30Meaning of each letter is given in the tables 4 and 5.

Needle roller bearings are small in sectional height, therefore useful in making machinery smaller and lighter. This type of bearing is used in a wide range of machinery such as automobiles, motorcycles, electric machines, machine tools, aerospace and office equipment.• Heavy duty, single row, radial needle roller bearing for applications with high dynamic and static loads• High load-carrying capacity with a reduced cross-section for use in restricted spaces• Steel cage guides and evenly spaces rollers for reduced friction, vibration, and noise• Thick, one-piece outer ring with flanges provides axial guidance for cage and rollers• Lubrication groove and oil hole for applying lubrication in place

Good water resistance, high dropping point, but limited low temperature use (slightly worse even than calcium greases). Very high price. Barium and many of it’s compounds are toxic!

Consistency (hardness) is measured with a cone, by methods standardized under ASTM 217 IP 50, or DIN 51804, part 1. Measuring unit represents depth the measuring cone enters the tested grease. Testing procedure is shown in the picture 2 below.

As a thickener, modified clay – bentonite – powder is used. Greases for high working temperatures. High price and incompatibility with most other grease types make this grease not the best choice for lubricating bicycle bearings.

My second choice would be a more frequent application of some PTFE spray lubricant (low-viscosity, “thin” oil-based lubricant) – i.e. just not WD40 (to emphasize that just to be on the safe side).

Lithiumgrease forbikebearings

I haven’t been able to measure any benefits of more expensive greases. Dirt intrusion is what kills the bearings and past lithium complex grease any additional extra quality seems to make no difference in durability and prolonged service intervals.

Solid lubricants are used in extremely high, or low temperatures, extreme pressures, sudden and great variations of loads, hardly accessible parts, parts that can not be regularly re-lubed, corrosive environments, vacuums, or high speed moving parts. Solid lubricants are also practical in conditions where dirt, dust, or sand occur in amounts that could cause problems, because they aren’t as sticky to collect much dirt. They can also fill in gaps between partially worn parts, prolonging the replacement period. Solid lubricants are also used to ensure good running in, instead of wear of recently machined metal surfaces.

!! NKXZ12 is out of stock and potentially not available for 6 months or more. Please email engineering@misumiusa.com for alternative products.

Needle roller bearings are small in sectional height, therefore useful in making machinery smaller and lighter. This type of bearing is used in a wide range of machinery such as automobiles, motorcycles, electric machines, machine tools, aerospace and office equipment.• Thrust needle roller and cage assembly for applications with high dynamic loads• High axial load capacity with reduced cross-section for use in restricted spaces• Steel cage guides and evenly spaces rollers for reduced friction, vibration, and noise• Through-hardened, high-carbon chromium steel rollers for heat tolerance and durability under heavy loads

Bicycle bearings, whether on wheels, cranks, or fork, are usually ball bearings, i.e. they consist of balls, trapped between two races. These bearings are almost never made to be easily re-lubricated from the outside, without disassembling them, so frequent lubrication would take a lot of time.

Another important thing is the speed. When a bicycle is ridden around 30 km/h, wheels turn about 250 times per minute (250 rpm). Pedals are rarely turning faster than 100 revolutions per minute, while the steerer bearings rpm is much lower. Also, the distances traveled by bearing balls are relatively small due to the small diameter shaft. When the tyre travels around one meter, hub bearings cover a distance of under 10 centimeters.

Of important criteria listed in paragraph 3.1. these greases only have problems with fulfilling Crit. 1. (for extreme conditions of bicycle use), while Crit. 3. is probably best satisfied of all the other grease types, except some enormously expensive ones.

There’s nothing scientific or objective about your arguments. A gish gallup of links that we need to then debunk doesn’t change that. You aren’t making a specific argument then supporting it, you’re just firing a shotgun of BS along with a bunch of insults. If you don’t mean to troll, you sure come off as a troll. You completely miss Relja’s point which was looking at multiple factors including price and availability, not just optimal lubrication coefficients. The reality is, as you said yourself, a bike doesn’t have strenuous demands… any of these greases will work granted it’s not mixed with another incompatible grease.

Solid lubricant groups most commonly used are lamellar solids, polymers and soft metal films. In addition to noted, there are some more, better to call them subgroups of solid lubricants, such as multipurpose solid lubricants, combinations of ceramics and solid lubricants, materials made of glass etc. Those lubricants are usually used for extreme and special conditions and temperatures over 1000 °C, to they will not be explained in a post that is about bicycle bearing greases.

Table 6 gives a comparative overview of some commonly used solid lubricants. As can be seen, MoS2 satisfies most criteria and that is why it’s most commonly used, often as an additive to greases.

As a general guide, one can use the following: greases with the same types of thickeners and similar base oils are usually compatible (e.g. lithium grease with another lithium, or even lithium complex grease). Table 7 shows grease compatibilities based on thickener compatibility, while table 8 shows base oil compatibility. Both compatibilities should match in order to safely mix the two greases.

Somewhat wider use temperature range than ordinary lithium greases (completely irrelevant for bicycle bearing lubrication use). Usually have better resistance to corrosion and water washout, similar to that of calcium greases.

It is quite popular, especially among road bike racers, to pour oil into the bearings (particularly the hubs). The logic is that oil generates much less rolling resistance compared to grease, because it is much “thinner”, more liquid. For the same reason, the oil leaks out easier and is less efficient at keeping dust and water from penetrating the bearing.

I think you read this page as if it was supposed to be an academic argument instead of just general advice and an intro to grease for a curious home mechanic that isn’t trying to find the most optimal bicycle grease in the entire universe. As a 3rd party observer, I think you’re the one being stubborn and missing the point of this page entirely. You don’t need to be a white knight for polyurea and I’m really not sure why you are taking it that way. If I even wanted to use polyurea other than Park’s polylube I’d have to special order it from Grainger or something, it’s not even commonly available. On a similar note, there aren’t a lot of aluminum based marine greases around either, most are calcium or lithium… but if you really think that aluminum is superior based on a single study taken out of context, Royal Purple’s marine grease uses an aluminum thickener (and it looks cool, so there’s that).

the bearing, prevention of ingress of foreign matter, and stable sealing. Provides sealed spherical roller bearings with the worldʼs largest load capacity ...

Table 1 shows grease division and characteristics according to thickener type. Note that maximal use temperature is significantly lower than dropping point temperature (at which grease becomes practically a dripping oil).

Mar 22, 2021 — What Causes Wheel Bearing Malfunction? · Driving Conditions · Quality · Uneven Roads · Poor Installation · Imbalanced tires · Accidents.

Designed as a thin wall type, the SL Model double-row cylindrical roller bearing supports enormous radial and impact loads. Therefore, it is ideal for use in parts subject to medium low-speed large loads. This bearing has various uses, such as in construction machinery, vehicles, steel machinery and lifting equipment, etc.

Having said that, my first-choice alternatives would be Slick Honey or Slickoleum (Amazon affiliate links) – whichever one I can find cheaper.

Polymers are used as thin lubricating films, as self-lubricating materials for elements manufacturing and as a bonding material for lamellar solids. The most famous polymer solid lubricants are tetrafluoroethylene (TFE), a gas without colour and smell, which with polymerization gives polytetrafluoroethylene (PTFE). PTFE is registered under the (often used) name of Teflon, by DuPont company. One of the most slippery materials on the planet, with a friction coefficient similar to wet ice sliding over wet ice. ?

• Specification: Standard• Standard Size: Metric Series• Load Direction: Radial• Raceway Ring Shape: Self-Aligning Roller• Number Of Raceway Ring Rows: Double Row

• Specification: Standard• Outer Ring: With Outer Ring• Raceway Ring Shape: Needle Roller• Inner/Outer Ring Material: Steel• Rolling Element Material: Steel

Criterion 5 – Keeping stable structure and hardness for a longer period of exploitation. Re-lubing bicycle bearings more often than once a year is highly impractical.

Graphite. Has low friction coefficient, but use (and maximal use temperature) is limited because in order to minimize friction, it needs to absorb some moisture. It also has a high electrical potential of +25 V, so can cause strong galvanic corrosion of copper and stainless steel alloys in salty water. In practice it is used for temperatures up to 600 °C.

Many soft metals, like copper, silver, gold, zinc, lead etc. have low shear resistance and can be used as a lubricant, put in a thin layer over sliding hard surfaces. Soft metal films are useful for tempereatures up to 1000 °C, but are less often used nowadays.

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