IATF16949:2016 Quality Management System certified
The part is a shaft with partial black oxide coating and knurling.
The black oxide knurling shaft is machined by CNC lathe and drilling machine then will be sent to surface treatment.
The tolerances on are extremely tight for turning operations. Ningbo Luteng developed processes and controls to allow these journals to be turned to specification without the need for grinding or secondary operations. When these parts are machined, careful attention to temperature control must be maintained, as fluctuations in temperature can cause parts to go out of tolerance. In addition, the heavy metal removal in the center of the part presented a challenge to maintain straightness.
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