Cylindrical Roller Bearing Service Life
Cylindrical roller bearings also have two-row nn-shaped, nnu-shaped and four-row cylindrical roller bearings. Cylindrical roller bearings generally used steel stamping cage, large size or used for high-speed rotation of the use of brass turning cage, double row or four row cylindrical roller bearings are used latch cage to extend the bearing service life. In the reducer, pulley group, Cylindrical Roller Bearing printing machinery and other occasions widely used.
1. Assembly and disassembly of bearings
The bearing should be cleaned before installation. When installing, should use special tool to press the auxiliary bearing straight evenly, do not use the hammer to strike, specially forbids directly on the bearing to knock. When the bearing seat ring and the seat hole cooperate loosen, should repair the seat hole or the replacement bearing, does not use in the bearing match surface to beat the hemp point or the cushion copper skin The method reluctantly uses. The bearing shall be pulled out with a suitable puller and not with chisels, Cylindrical Roller Bearing hammer and other percussion bearings.
2. Bearing LUBRICATION
Cylindrical roller bearings commonly used lubricants are lubricating oil and grease two kinds. When the circumference of the shaft is less than the 4-5m S, Cylindrical Roller Bearing or the parts of the car can not be lubricated with lubricating oil, lubricating grease is used. Lubricating grease is the advantage of simple sealing structure, grease is not easy to lose, affected by the temperature is not small, add a grease can be used for a long time.
The use of grease to pay attention to two of the problem, first, according to the requirements of the car specifications, the use of the appropriate brand of grease. For example, the automobile pump bearing is not suitable to choose sonar grease, because its water resistance is poor. The second is to add the bearing of the grease to the right amount, generally only filling the bearing cavity of the 1 2 L 3 appropriate, Cylindrical Roller Bearing too much not only useless, but also to increase the bearing running resistance, so that heating up. Special attention should be paid to the automobile wheel bearings, to promote "empty hub lubrication", that is only in the bearing on a layer of grease can be, otherwise, not only waste and heat dissipation, but also will make the grease heat spillover, may affect the braking performance.
Lubricating oil lubrication has the advantage of small friction resistance, and can dissipate heat, mainly for high-speed and working environment with high temperature bearings. Cylindrical Roller Bearing The grade of lubricating oil should be selected according to the specifications of the car, and pick up the car maintenance cycle timely replacement, release the old oil after the body to be cleaned and then add new oil, refueling should be added to the required marking, or with the refueling mouth flat (depending on the specific structure of the car, the requirements), not to add.