... , 520, 520H, 530, 530H, 05MA, 05MB, 05MC, 06MC 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series ... ,SC105. PIV chains: A0,A1,A3,A4,A5,A66. O-ring chains and xw-chains: 420,428,520,525,530,630 ... 6 4.0 Acceptable High speed roll mill CL06B, CL08B, LC10A 4 3.0 Acceptable Ordinary roll mill D9.525, D12.7, D15.875 ...