Q1 = M L1 + (3 x P) L1 = X = Q1 = M L1 = X = D1 = o C1 C1 = C L1 = X = Q2 = M L2 + (3 x P) L2 = Y = Q2 = M L2 = Y = D2 = o L2 = C2 C2 = C Y = Axial: Top (Long shaft side) Axial: Bottom (Short shaft side) Symbol: A1 The long shaft can be further shortened by machining female threads into it. (If shortening the shaft is not required, indicate “*” for dimension X.) �� Not available for size 10 �� The maximum dimension L1 is, as a rule, twice the thread size. (Example) For M3: L1 = 6 mm �� Applicable shaft type: W (mm) Size CRB2 CRBU2 X Q1 X Q1 15 4 to 18 M3 1.5 to 18 M3 20 4.5 to 20 M3, M4 1.5 to 20 M3, M4 30 5 to 22 M3, M4, M5 2 to 22 M3, M4, M5 Symbol: A3 The long shaft can be further shortened by machining male threads into it. (If shortening the shaft is not required, indicate “*” for dimension X.) �� Applicable shaft type: W (mm) Size CRB2 CRBU2 X L1 max Q1 X L1 max Q1 10 9 to 14 X-5 M4 7 to 14 X-3 M4 15 11 to 18 X-6 M5 8.5 to 18 X-3.5 M5 20 13 to 20 X-7 M6 10 to 20 X-4 M6 30 16 to 22 X-8 M8 13 to 22 X-5 M8 Symbol: A5 The long shaft can be further shortened by machining it into a stepped round shaft. (If shortening the shaft is not required, indicate “*” for dimension X.) �� Applicable shaft type: W �� Equal dimensions are indicated by the same marker. (If not specifying dimension C1, indicate “*” instead.) (mm) Size CRB2 CRBU2 X L1 max D1 X L1 max D1 10 4 to 14 X-3 o3 2 to 14 X-1 o3 15 5 to 18 X-4 o3 to o4 3 to 18 X-1.5 o3 to o4 20 6 to 20 X-4.5 o3 to o5 3 to 20 X-1.5 o3 to o5 30 6 to 22 X-5 o3 to o6 3 to 22 X-2 o3 to o6 Symbol: A2 The short shaft can be further shortened by machining female threads into it. (If shortening the shaft is not required, indicate “*” for dimension Y.) �� Not available for size 10 �� The maximum dimension L2 is, as a rule, twice the thread size. (Example) For M3: L2 = 6 mm �� Applicable shaft type: W (mm) Size CRB2, CRBU2 Y Q2 15 1.5 to 9 M3 20 1.5 to 10 M3, M4 30 2 to 13 M3, M4, M5 40 4.5 to 15 M3, M4, M5 Symbol: A4 The short shaft can be further shortened by machining male threads into it. (If shortening the shaft is not required, indicate “*” for dimension Y.) �� Applicable shaft type: W (mm) Size CRB2, CRBU2 Y L2 max Q2 10 7 to 8 Y-3 M 4 15 8.5 to 9 Y-3.5 M 5 20 10 Y-4 M 6 30 13 Y-5 M 8 40 15 Y-6 M10 Symbol: A6 The short shaft can be further shortened by machining it into a stepped round shaft. (If shortening the shaft is not required, indicate “*” for dimension Y.) �� Applicable shaft type: W �� Equal dimensions are indicated by the same marker. (If not specifying dimension C2, indicate “*” instead.) (mm) Size CRB2, CRBU2 Y L2 max D2 10 2 to 8 Y-1 o3 15 3 to 9 Y-1.5 o3 to o4 20 3 to 10 Y-1.5 o3 to o5 30 3 to 13 Y-2 o3 to o6 40 6 to 15 Y-4.5 o3 to o8 36 Series CRB�ｮ2