... .1-3.0 ISO9001:2008; tolerance: +/-0.0001 worm and wheel gears Specifications:1) Suitable for various automotive, electronic, telecommunications, mechanical ... , others optional can be as requirements6)Material: iron/aluminum, copper, alloy, carbon steel, 18CrMnTi,20CrMnTi,20Cr,20CrV,1045 steel, others optional7 ... output of over 1 million pieces per month. worm and wheel gears