Bearing accuracy
November 1st 2006 A high precision combined radial, thrust bearing designed for machine tool rotary tables and spindle heads has been developed with an integrated angle measuring system by bearing manufacturer Unitec. Available in the UK from R. A. Rodriguez, the new Unitec RTB AMS bearings use an inductive detecting principle. as a result, no magnetic field, nor the presence of lubricating fluid or grease, interferes or influences measurement accuracy. The system includes a graduated stainless steel scale that fits precisely onto the bearing's washer ring and two sensor heads on the outer ring, sited at 180° to the centre line. During rotation, the sensors detect the slots on the scale and generate a 1Vpp output signal to the machine's CNC, enabling the angle to be continuously monitored. The scale slots, set at intervals of 1mm, are protected from dirt ingress by a metal cover. The new bearing is available in seven sizes with bores from 150 to 460mm. More articles from R A Rodriguez UK Ltd: | 
