... :2008 & 2000; minimum tolerance: +/-0.0001 bronze gear and wormsSpecifications:1) Suitable for various automotive, electronic, telecommunications ... lathes, automatic milling machines, centreless grinders, instrument lathes and accessories like drills, mill devices, Mitutoyo concentric circles ... Copper and Aluminum, and so on, with an output of over 1 million pieces per month. bronze gear and worms