... 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 ... treatment,machining service.6. Manufacturing equipment (foundry used): cupola, electric furnace, resin-bonded, dry sand mix miller, quake press molding machine ...