2011 CIMT:W4-D80 mainly used for forming in tuming automation lines and special machines in bearing machining operation 2011 CIMT:W4-D80Carbide inserts for bearings are mainly used for forming in tuming automation lines and special machines in bearing machining operations. They are used for race, closed-groove, end-fillet,welded inner groove & closed grooves, outer closed grooves,etc.Higher ...