Dual-lead Gears Chosen For Rotary Table Drives

Dual-lead Gears Chosen For Rotary Table Drives German machine builder Ruckle has chosen Holroyd dual-lead gears for their rotary table drives. Ruckle manufactures high-quality, positional indexing, rotary table drives. These tables are used for accurate work holding when fitted to turning or milling machines. Renold Gears' Holroyd dual-lead wormgear sets are ideally suited for use in positional machinery as they provide a kinematically correct gear which can run in either direction of rotation and on which the backlash is infinitely adjustable from an acceptable maximum to zero. The gears are manufactured in matched pairs and the mounting diameters are designed to fit to the customer's specific requirements. Unique transmission testing of the profile of the gears ensures a constant gearing contact throughout its full rotation.This comprises a continuous measurement of the angular position of the driven wormwheel relative to where it should be with a perfect gearset as the driving worm rotates at a uniform rate.The test measures, and records directly, pitch and eccentricity errors, and also the profile errors of the active part of the profile. The gears are supplied in sizes from 125mm to 550mm gearing centres with gearing ratios up to 180/1.