BS Series

Parameter

Details

• Structural features: The inner and outer rings are made of high-purity bearing steel that strictly controls oxide impurities that are harmful to rolling fatigue life. The contact angle is 60º and the number of steel balls is large. The axial rigidity of the BS sealed series screw bearing is improved. Large; compared with tapered roller bearings and cylindrical roller bearings, the starting torque is small, and low driving force and high-precision operation are realized; when used in pairs, it can bear axial load and radial load or composite load.
• Contact angle: 60°
• Cage: Nylon cage guided by rolling elements.
• Speed factor: Grease lubrication DmN≤400000, that is, the limited speed N≤400000/Dm Dm—bearing diameter
• Scope of application: Mainly used in working conditions that require precise axial positioning and repeat positioning accuracy. For example: CNC lathe screw support, CNC grinder screw support, automatic CNC bearing ring grinder screw support, CNC machining center screw support and other types of CNC precision transmission machinery screw support.

Quality Standard

Rockewell Bearings has added parameters that are not defined by ISO/ABEC for customers, including preload tolerances, functional tests, traceability and micron codes, cleanliness, raceway curvature, balls, etc. and roundness, surface processing (function And non-functional surfaces), steel specifications, cage trim and design, and installation chamfering. The definition of these parameters improves the quality of precision angular contact ball bearing products, thereby improving the performance of machine tool spindles.
The element of precision angular contact ball bearings is the cage, which is very important for machine tool bearings. The performance of the cage will affect the stability of machine tool bearings under high-speed rotation. The standard cage produced by Rockewell is made of phenolic resin. The internal design and the tolerance of the pocket gap are tight and the guide surface is controlled to ensure the stability of the cage during high-speed operation, lubrication and dynamic load.
The two elements of precision angular contact ball bearings are cleanliness, which is very important for precision angular contact ball bearings. Generally, the parts of the bearing products must be cleaned with a multi-solvent for 3 hours to prevent impurities from entering the bearing and prevent inherent pollution sources. In addition, the non-working surface of the bearing must be ground to ensure that the bearing is free of impurities before leaving the factory. Therefore, the bearing products produced by Rockewell can increase the normal operating time of the machine tool.
There are two main structural design methods for precision angular contact ball bearings: the high-rigidity WI series and the high-speed HX series to meet the requirements of different applications. The basic, open Rockewell bearing design has a higher spindle speed and greater dynamic radial stiffness, so the spindle can cut more material in a shorter time while ensuring excellent finished product tolerances. These improvements are attributed to the combination of the ball body and the precision engineering design of the raceway profile, which improves the processing rate.