... Roller Bearings 1.High precision & quality 2.ISO 9001 certified 3.Low noise,Stable in chemical stable and ... super quality Taper Roller Bearings Material: chrome steel STEEL NO.COMPONENTCSiMnCrMoPS CuNiGCr150.95~1 ... 5-15, Upper H26-48.5-13), etc Specification:1) Open, Z, ZZ, RZ,2RZ,RS, 2RS ... Clearance: C0, C2, C3 3) Precision Tolerance: ABEC-1 (P0), ABEC-3 (P6), ABE C-5(P5)4 ...