steel gear ring 1,gear wheel component,material:steel 2,process:eg,forged blank,inspection,tempering,machined by lathe,drill steel gear ring1, Ring gear is ... , used with starter gear meshing, drive shaft rotation, starting the engine.2,material:#45 steel,40Cr3,process: forged blank,inspection,tempering,machined ... the parts are qualified and provide final inspection report. steel gear ring