steel gear ring 1,gear wheel component,material:steel 2,process:eg,forged blank,inspection,tempering,machined by ... starter gear meshing, drive shaft rotation, starting the engine.2,material:#45 steel,40Cr3,process: forged blank,inspection,tempering,machined by ... feel free to contact with me about more details,eg,material,annual quantity and so on.5,QA,we will arrange ...