... NF 3.100%QC Detail Feature: steel spline gear shaft for car gearbox Product Name: steel gear shaftMaterials: grey iron ... time: 30-50days Place of Origin: Ningbo, China Software for specification drawings: PDF, Auto CAD, Solid work, JPG, Proe ... drill machine,normal lathe, line cutter etc.7. Testing equipment (foundry used): elongation tester, hardness tester, metallographic microscope, spectrometer, ...