Size 50 63 80 100 Q1 M3, M4, M5 M4, M5, M6 M4, M5, M6 M5, M6, M8 (mm) Axial: Top (Long shaft side) Axial: Bottom (Short shaft side) Size 50 63 80 100 Q2 M3, M4, M5 M4, M5, M6 M4, M5, M6 M5, M6, M8 (mm) M5 x 0.8 M6 x 1 M8 x 1.25 50 o4.2 . . 63 o4.2 o5 . 80 o4.2 o5 . 100 . o5 o6.8 (mm) M5 x 0.8 M6 x 1 M8 x 1.25 50 o4.2 . . 63 o4.2 o5 . 80 o4.2 o5 . 100 . o5 o6.8 (mm) Q2 = M L2 + (3 x P) L2 = Q1 = M L1 = Q2 = M L2 = Size 50 63 80 100 Keyway dimension 4 x 4 x 20 5 x 5 x 25 5 x 5 x 36 7 x 7 x 40 LL 5 (mm) LL LL Size 50 63 80 100 X 24.5 to 39.5 28 to 45 30.5 to 53.5 40 to 65 (mm) Size 50 63 80 100 Y 4 to 19.5 4 to 21 4 to 23.5 5 to 30 (mm) X = Y = Symbol: A1 Machine female threads into the long shaft. . The maximum dimension L1 is, as a rule, twice the thread size. (Example) For M3: L1 = 6 . Applicable shaft type: W Q1 = M L1 + (3 x P) L1 = Symbol: A14 Applicable to single vane type only A special end is machined onto the long shaft, and a through-hole is drilled into it. Female threads are machined into the through-holes, whose diameter is equivalent to the diameter of the pilot holes. . The maximum dimension L1 is, as a rule, twice the thread size. (Example) For M5: L1 = 10 . Applicable shaft type: W Size Thread Symbol: A17 Shorten the long shaft. . Applicable shaft type: W Symbol: A24 Double key Keys and keyways are machined at 180° of standard position. . Applicable shaft type: W . Equal dimensions are indicated by the same marker. Keyway dimensions Symbol: A2 Machine female threads into the short shaft. . The maximum dimension L2 is, as a rule, twice the thread size. (Example) For M4: L2 = 8 . Applicable shaft type: W Symbol: A15 Applicable to single vane type only A special end is machined onto the short shaft, and a through hole is drilled into it. Female threads are machined into the through-hole, whose diameter is equivalent to the pilot hole diameter. . The maximum dimension L2 is, as a rule, twice the thread size. (Example) For M4: L2 = 8 . Applicable shaft type: W Size Thread Symbol: A18 Shorten the short shaft. . Applicable shaft type: W Series CRB1 128