1.steel spline gear shaft for car gearbox 2.Standard: ASTM, AISI, BS, DIN, JIS, NF 3.100 ... %QC Detail Feature: steel spline gear shaft for car gearbox Product Name: steel gear shaftMaterials: grey iron, ductile iron, ... treatment cellar.Manufacturing equipment (machine shop used): numerical control lathe, vertical type CNC machining center, boring machine, universal miller, standing miller ...