... .0 ISO9001:2008; tolerance: +/-0.0001mm brass worm gear for gearbox Specifications:1) Suitable for various automotive, electronic, telecommunications, mechanical products ... circles, optical projectors, Mitutoyo fineness instruments for inspection, EDM, high speed CNC machine, Sodick wire EDM, etc. 3)Quality control equipments ... over 1 million pieces per month. brass worm gear for gearbox