GY6 50 ROCKER ARM

chromeplating Technology: The convex surface is chromeplated in order to significantly improve their service life. 0.5-0.8mm The convex Surface Hardness is HRC61-63. And the depth of hardened layer is 0.5-0.8mm. 0.006-0.01mm Machining Accuracy: Parallelism of convex surface and shaft hole is 0.01mm; shaft hole Circularity: 0.005mm;bore tolerance:0.006-0.01mm. Verticality of Screw Thread in valve adjustment screw is within 0.25 degree, which can ensure bearing stress evenly when valve opens.