What is a reasonable amount of grease

The reasonable amount of grease can often improve the service life of bearings. Many academic papers on lubrication have discussed this issue, and today let's talk about this dosage. Some people think that grease is used to lubricate bearings, of course, the more the better, in fact, it is not.

First of all, it is unnecessary to add too much grease to the bearing, but it will increase the friction and increase the temperature. Conversely, if the grease is too little, the oil film repairability of the grease is not strong, which will make the lubrication state of the bearing worse. Therefore, it is important to determine the appropriate filling amount of grease in the bearing.

How to use it should be judged according to different kinds of bearings. Because bearings are also divided into many kinds, such as ball bearings, needle bearings, thrust bearings, plain bearings are not the same.

A brief example of rolling bearings. The general filling amount of grease in the rolling bearing can be referred to the following principles: (1) the general bearing should not be filled with grease, so as to fill 1/2 to 3/4 of the total space of the bearing inner cavity. (2) The horizontal bearing fills 2/3 ~ 3/4 of the inner cavity space; (3) Vertically mounted bearings fill 1/2 (upper side) and 3/4 (lower side) of the inner cavity space; (4) In an easily polluted environment, for low-speed or medium-speed bearings, fill all the space in the bearing box; (5) High-speed bearings should be placed in high-quality lubricating oil before loading grease, generally soaked in the base oil of the installed grease, so as not to burn out the bearing due to insufficient grease on the friction surface when starting. The filling amount of grease can usually be estimated according to the following formula: V (cm3) =0.01 * d (inner diameter mm) * B (width mm) bearing after running for a period of time, need to add grease, Germany kluber company gave an estimation formula: V1 (cm3) =0.005 * d (inner diameter mm) * B (width mm)

If you do not understand, please feel free to consult.