... ISO 9001 certified 3.Low noise,Stable in chemical 2013 New Taper Roller Bearings Material: chrome steel STEEL NO. ... 95~1.050.15~0.350.25~0.451.40~1.65≤0.10≤0.025≤0.25≤0.25≤0.3 GCr15 bearing ... 12); Knuckle Upper Lower XRM(Lower H27-48.5-15, Upper H26-48.5-13), etc Specification:1) Open, Z, ... Tolerance: ABEC-1 (P0), ABEC-3 (P6), ABE C-5(P5)4) Noise Level: Z2V1, Z3V2 , Z4V3Detailed size: Bearing ...