slewing bearing clearance

  Technical Guide Clearance vs. Preload in Slewing Bearings: How to Choose for a Machine Tool Rotary Table What each setting does, when a rotary table needs it, and what to put in your inquiry Guide from Anhui Yuanfeng Slewing Rings Co., Ltd. Quick Answer Clearance is the small free movement inside a bearing; preload, also called zero clearance, removes that movement and puts the rolling elements under slight pressure. For rotary tables on boring mills, milling machines and vertical lathes, a preloaded or zero-clearance bearing usually gives better rigidity and positioning, at the cost of higher rotating torque. For slow, light-duty or non-precision applications, normal clearance is often enough and costs less. The right choice depends on your cutting load, accuracy target and...