SKF has developed its Silent Series super-precision angular contact ball bearings for the production of grease-lubricated spindles. The new series is in direct response to key issues reported by manufacturers of machine tool spindles who said that minimizing noise and vibration levels during operation was key to improving confidence in the performance of their spindles.
Bearing cages in lower-speed spindles can make rattling noises during rotation. This is normal, but it can be mistaken for a sign that something is wrong with the spindle or its components. The SKF Silent Series features a new, innovative polyamide cage centred on the balls, which minimizes this “cage rattling” during rotation. The silent operation of the bearing increases the confidence of the end user in the quality of spindles.