Lubricating oil

The following is an approximate guide for when to use oil or grease on gears:Circumferential speeds of up to 2 m / s:High-consistency adhesive lubricants are used on large, open-running gears e.g. cement mills; crane installations and rotary kiln drives. These contain bitumen additives that improve the adhesion or other adhesives that give the product a certain elastic property. They are applied or sprayed on with a brush.

lubrication中文

The following is an approximate guide for when to use grease or oil on Bearings:Sleeve bearings use oilRolling bearings with DN > ~ 250,000 inch RPM => use oil (grease would likely overheat)Rolling bearings with DN < 250,000 inch RPM => prefer grease since it is generally a simpler solution to install and maintain, no significant leak or level-maintaining issues (but does need periodic greasing).

Analytic cookies use Google Analytics to store anonymous information about number of visits and visited pages. By leaving this cookie enabled, you help improving this websites.

Machinerylubrication

Motor oil

Circumferential speeds of more than> 15 m / s:Oil spray lubrication is usually required here. The oil is usually injected radially shortly before the gear meshes with a pump in a wide jet. The oil can also be distributed under pressure over the teeth through properly ordered channels.

Lubricationtheory

This website uses cookies to optimize/enhance your user experience. Cookie information is being stored in your browser helping the websites to recognize you on your next visit while analyzing which content might be the most appropriate or interesting for you.

Tracking cookies are used to store your visits and website behaviour in order to offer you a customized website experience. This website is currently not using '3rd Party Cookies'.

Circumferential speeds of up to 15 m / s:This is where the oil immersion lubrication is most common. Either the gears or the dragged scoop wheels and spray discs lubricate the tooth flanks by their own movement.

Functional cookies are essential cookies which are required for correct functioning of the website and being able to store your cookie-preferences.

D*N = bearing bore diameter times speed. There may be slightly varying definitions using mean bearing diameter and slightly different limits as to where grease becomes ineffective. Higher-precision bearings with special cages can extend the viable range of grease lubrication.

Engine oil

lubrication意思

If you disable this cookie, your preferences can't be stored. It implicates that you have to set it again on every next visit.

Circumferential speeds of up to 4 m / s:Here, a grease dip lubrication with soft gear grease, into which a gear is immersed, is common. The use of immersion lubrication implies that the after-flow of lubricant between the teeth is ensured. Too high a grease consistency, possibly together with a low temperature, can lead to free running of the gears, so that the amount of lubricant required at the friction point is no longer available.

We use cookies to enhance your user experience. In settings you can find more information about which cookies we use and how you can enable/disable them.

Although oil and grease are used for the same reasons – to prevent metal-on-metal contact and protect equipment from wear and tear – they have different characteristics each providing different benefits.

Typically, oil performs better in high temperature applications and those where there is high speed and extreme friction. Grease, on the other hand, works well in bearing applications that operate at moderate speeds where temperatures are not excessively high. Grease also tends to be used when the mechanism cannot be lubricated frequently as grease stays in place better. In stop-start situations, for example, the oil returns to the crankcase, but grease remains on the part where it is needed.

Generally, the original equipment manufacturer will state whether a grease or lubricant should be used. You should also consult your lubricant supplier who should be able to advise you on the best options.