Yamaha Connecting Rods

Royal Formosa Tiger's YAMAHA connecting rods are created from AISA8620 and JIS SCM420H case-hardened steel; it also undergoes double forging and precision to be finished. The carburizing depth of our heat treatment is 0.8~1.2m/m and the hardness degree is HRC60-62. After passing through sub-zero treatment and honing, the roundness tester is within 0.003 and the surface tester Ra is within 0.2.