Bajaj3Wheeler箱连杆

Connecting Rod Material: SCM420 Big end surface hardness: 59- 65HRC Small end surface hardness: 30- 40HRC ( or 59-65HRC) Roughness of Inner Hole Surface: ≤Ra 0.2 with a cross pattern Dimension Tolerances: Parallelism 0.04/100; Cylindrical 0.003; Circularity 0.003 Needle Bearing Cage Material: SCM415 / SCM420 Needle Material: SUJ2 Needle Hardness: ≥HV700(HRC60) Needle Ends Treatment: Crowning (or Controlled Contour) Cage Surface Treatment: Carbonitriding, Copper-plated, Silver-plated, Black coating