Obtaining lubrication recommendations should not be hard as there are numerous lubricant manufacturers and distributors that should have the knowledge and specifications to provide professional help. Experience learned with their products in similar equipment and/or similar operating conditions is often the best reason for choosing a brand, lubricant type for the bearings in a piece of equipment.

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Hex Pin Button Head Security Screws, also known as Pin Hex, feature a domed head and an internal hexagon pin socket drive. The hexagon pin drive allows for force to be more evenly distributed whilst tightening. This means a higher level of torx can be applied to the fixture and also reduces the chances of cam-out, which may cause damage to the screw drive.

There are two basic types of bearing lubricants readily available: Oil and Grease. The former is fairly simple to understand, being a free-flowing liquid, while the latter is a little more complex.  In order to be a lubricant, all greases have oil that is entrained in a thickened base. It is this base that gives the impression that grease is a more viscous type of oil; however, it is the oil in the grease that does the actual lubricating. Each type of lubricant has its own advantages and disadvantages and is selected by the nature of the application. The major advantages of the two basic types of lubricants are:

Telephone: +44 (0)1691 654979 Email: sales@gwr-fasteners.co.uk Please note all prices exclude VAT, this is added at checkout

The different thickening bases have specific advantages so they may be selected for different applications. Some of their main advantages are:

We have tried to define the most important characteristics of a lubricant for our bearings so that they will provide a long service life to owners and operators of the equipment in which they are installed. Only some of the characteristics of the common oils and greases available have been briefly touched upon, leaving many more features of the various lubricants to be explained by a lubrication expert. If customers of our bearings have any questions or concerns about lubricant recommendations for their equipment, please do not hesitate to contact American Roller Bearing’s Sales Department or one of our field representatives. It is the stated policy of American Roller Bearing Company that we do not recommend a specific lubricant or even a company that manufactures lubricants. We will, however, verify that a lubricant chosen by our customers is suitable for our bearings.

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The “Grade” level of the grease is an indicator of how stiff the grease is. Grades “0” and “1” are relatively soft and are typically used at low operating temperatures. Grades “2”, “3”, and “4” are used at increasingly higher temperatures. Grade “3” is also usually used in vertical applications to prevent all the grease from settling at the bottom of the bearing.

American Roller Bearing Company primarily makes heavy duty industrial class bearings that are used in various industries in the US and around the world.

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Hex Pin Button Head Security Screws, also known as Pin Hex, feature a domed head and an internal hexagon pin socket drive. The hexagon pin drive allows for force to be more evenly distributed whilst tightening. This means a higher level of torx can be applied to the fixture and also reduces the chances of cam-out, which may cause damage to the screw drive. The internal pin drive adds a level of security to these screws, as a standard hexagon socket bit cannot be inserted. These security screws must instead be paired with a security drill bit, resulting in a tamper-proof fastening. Click Here to view the installation video. These Hexagon Pin Button Head Security Screws are made from A2 Stainless Steel which provides corrosion and oxidation resistance.For larger quantities or items not listed, please email sales@gwr-fasteners.co.uk and one of our team will provide you with a quotation.

Each manufacturer of a lubricant can supply a specification sheet for each of their products, and each sheet will have a list of about 20 properties and their values related to this lubricant. The most important property of any lubricant for rolling element bearings is its oil viscosity. If the specification sheet is for an oil, the viscosity values will be for the oil. If it’s a grease, it should refer to “Base Oil Viscosity” or another similar term, depending on the manufacturer. Usually, four viscosity values are shown as follows:

Generally, grease lubrication is chosen if the lubrication demands of the bearing will allow it. Typical grease systems are much simpler than oil systems and do not cost as much. Often, the only features needed are grease supply holes and an external grease nipple for replenishment.

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From a performance aspect, oil is the best form of lubrication, and it offers several types of delivery methods to the bearings. The simplest form is that of maintaining a static oil level in the bearing’s housing. In several types of equipment, such as those with gears and/or connecting rods, the oil supplied to these components creates a fog or spray that wets the bearing contact surfaces. This is sometimes called “splash lubrication.”

Additives are a very important feature of modern oils and greases and can often mean the difference for successful, long term operation of bearings and other machine components. The selection of any lubricant over another should always consider additives.

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For larger quantities or items not listed, please email sales@gwr-fasteners.co.uk and one of our team will provide you with a quotation.

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Next in complexity are the oil mist and air/oil systems that are designed to provide the exact amount of oil needed for lubrication, preventing excess oil that could be churned by the bearing, increasing drag and temperature.

For high-speed applications, jetted circulating oil is often necessary.  Nozzles inject oil directly into the bearing providing a duel function of lubrication and removal of heat. These systems are complicated and expensive and are selected when absolutely necessary.

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In many applications, it is necessary to replenish the grease at regular intervals as the old grease will “dry out” from bleeding oil to the moving parts of the bearing, and the thickening base will oxidize. Re-greasing should be an integral part of the design of the equipment, and some bearing types already provide a re-lube feature. Good designers will provide accessible grease passages in the machine itself for getting grease into the bearing. It does very little good to push new grease up against a bearing if the old grease blocks the way. It is far better to introduce new grease in the center of the bearing and let it push the old grease out each side. If this is not possible in the selected bearing, then the grease needs to be applied to one side of the bearing while the other side of the housing cavity provides someplace for the old grease to go. Some machine designs provided a purging vent or allow the old grease to escape under seal lips. Some types of equipment employed in industries that have abrasive particles in the air use the lubricating grease as a filter media to trap these particles. Regular re-greasing of these bearings and their housings purges the contaminated grease out of the bearing housings. It is important to remember that re-lubrication should be done when grease in the bearing is still good.

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American Roller Bearing Company primarily makes heavy duty industrial class bearings that are used in various industries in the US and around the world.

When choosing a grease for an application, several of its properties need to be considered for the expected operating conditions. The priority of these properties is:

Re-greasing intervals, that will always provide the proper amount of oil to the bearings, cannot always be accurately predicted. We do know that a proper interval is mainly a function of operating temperature, the number of hours in operation per day, and the size and speed of the bearing. Some equipment needs all the bearings re-greased every day, some once a week, some every two weeks, and some once a month. In applications such as this, it is often beneficial to completely wash out the bearings once a year, re-pack with new grease, and continue on with the established re-greasing program. Users are advised to not only inspect the condition of the old grease, but to send samples to a laboratory that specializes in analyzing used lubricants. The knowledge gained for each specific application is the best indicator of a proper re-greasing interval.

Telephone: +44 (0)1691 654979 Email: sales@gwr-fasteners.co.uk Please note all prices exclude VAT, this is added at checkout

It is very important to select a lubricant that will provide a minimum acceptable viscosity at the bearing’s operating temperature, which will usually be between the lowest and highest reference temperatures shown above. Typically, oil viscosity numbers decrease very rapidly with increasing temperature. Determining a bearing’s operating temperature is a fairly complicated calculation that is beyond the scope of this catalog. Calculating the viscosity of a lubricant at this temperature from the lubricant manufacturer’s specifications is yet another matter. Often, previous experience with an existing similar machine will indicate an acceptable lubricant. In house testing of a prototype or the first machine can indicate operating temperatures. Most machines use a lubricant that is selected to match the most severe demand of one component in the machine such as a bearing, gear, etc.

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The internal pin drive adds a level of security to these screws, as a standard hexagon socket bit cannot be inserted. These security screws must instead be paired with a security drill bit, resulting in a tamper-proof fastening.

American Roller Bearing primarily makes heavy duty bearings that are used in various industries in the US and around the world. Not only must our industrial class bearings provide long in-service life from a rolling fatigue criterion, but they must also hold together structurally from impacts, overloads, and occasional high-speed excursions. The design of every heavy-duty bearing has been optimized to this end, including our large bore bearings.

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Lubrication is absolutely essential to the proper operation of ball and roller bearings. A proper lubricant will reduce friction between the internal sliding surfaces of the bearings components and reduce or prevent metal-to-metal contact of the rolling elements with their raceways. Proper lubrication reduces wear and prevents corrosion, ensuring long service lives for bearings.

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