Main bearing bearing speed within the limits of the temperature rise caused by frictional heating, after when the speed exceeds a certain threshold, SKF bearings will burn and not continue to rotate. Angular contact ball bearings of the speed limit refers to the frictional heating does not cause burns and continuous rotation of the boundary values.
Therefore, bearing limit speed depends on bearing type, size and accuracy as well as lubrication, lubricant, maintenance of quality and quantity and type of material, loading conditions, among other factors. Angular contact ball bearings with grease lubrication and oil lubrication (oil bath lubrication) when the speed limit is contained in the table bearing size, the value represents a standard design of bearings under normal load conditions (around C/P>=13Fa/Fr<=0.25), rotation speed of limit value. In addition, according to their kinds and brands of lubricants different or better than other performance but not to spin.
C/P<13 amendment to limit speed load conditions (the equivalent dynamic load p more than the basic dynamic load rating c about 8%), or under synthetic load more than the radial load axial load in 25%, amendments to limit speed to use. Na=F1*F2*n here na: amendment Hou of limit speed, RPM F1: and load conditions about of amendment coefficient F2: and synthesis load about of amendment coefficient n: General load conditions Xia of limit speed, RPM (reference bearing size table) c: basic rated moving load, N{kgf}P: equivalent moving load, N{kgf}Fr: radial load, N{kgf}Fa: axis to load, N{kgf} corner contact ball bearing of limit speed With contact seals (RS) ball bearing limit rotational speed of seal contact surface speed limits, permitted line speed depends on the rubber sealing ring material.
FAG bearings manufacturing is based on standard tolerances for dimension of inner diameter and outer diameter dimensions, angular contact ball bearing inner ring and shaft, outer ring and seat combined with tension can only be achieved through control of the hole and shaft tolerances bore tolerances to achieve. Combined with the base of the bearing inner ring and shaft hole, combined with axis of the bearing outer ring and housing bore.
Choosing the right tie, you must know the actual load of the bearing condition, temperature, and other requirements, and the fact that it is difficult. Therefore, in most cases are based on refinements of choice used in response.
Load size
NSK bearings lubrication can be divided into oil and grease lubrication. Oil-lubricated bearings are generally used form of angular contact ball bearings, grease lubricated bearings generally use rubber seals shields or seals. Dust cover for high temperature or use the good parts, seals-contact and non-contact sealed type sealed two-contact sealing, dustproof performance good, but starting torque, non-regulated braking torque is small, but good sealing performance, no-contact.