CAT - ER COLLET CHUCK Taper Size A ➚ A .00012 AT3 Taper 58-60 HRc Ra 4µin CAT-30, 40 and 50 D1 L Ref G2.5 L1 Ref 20,000 RPM G L2 Ref J D G J D DL2Ref L1Ref ER16-20 D1 LRef ER25-50 Designation Range L L1 L2 D D1 J G CAT30 ER32X3.268* .080-.789 3.268 2.518 1.890 1.968 1.248 M18X1.5 1/2-13 CAT40 ER25X2.562 .041-.632 2.562 1.812 1.180 1.654 1.752 M16 5/8-11 CAT40 ER25X4.000 .041-.632 4.000 3.250 2.620 1.654 1.752 M16 5/8-11 CAT40 ER25X6.000 .041-.632 6.000 5.250 4.620 1.654 1.752 M16 5/8-11 CAT40 ER32X2.562 .080-.789 2.562 1.812 - 1.968 1.752 M22X1.5 5/8-11 CAT40 ER32X 4.000 .080-.789 4.000 3.250 - 1.968 1.752 M22X1.5 5/8-11 CAT40 ER32X 6.000 .080-.789 6.000 5.250 - 1.968 1.752 M22X1.5 5/8-11 CAT40 ER40X3.359 .120-1.025 3.359 2.609 - 2.480 1.752 M28X1.5 5/8-11 CAT40 ER40X 4.000 .120-1.025 4.000 3.250 - 2.480 1.752 M28X1.8 5/8-11 CAT50 ER25X4.000* .041-.632 4.000 3.250 2.580 1.654 2.752 M16 1-8 CAT50 ER25X6.000* .041-.632 6.000 5.250 4.620 1.654 2.752 M16 1-8 CAT50 ER25X8.000* .041-.632 8.000 7.250 6.580 1.654 2.752 M16 1-8 CAT50 ER32X4.000* .080-.789 4.000 3.250 2.540 1.968 2.752 M22X1.5 1-8 CAT50 ER32 X6.000* .080-.789 6.000 5.250 4.580 1.968 2.752 M22X1.5 1-8 CAT50 ER32 X8.000* .080-.789 8.000 7.250 6.580 1.968 2.752 M22X1.5 1-8 CAT50 ER40 X4.000* .120-1.025 4.000 3.250 2.620 2.480 2.752 M28X1.5 1-8 CAT50 ER40 X6.000* .120-1.025 6.000 5.250 4.620 2.480 2.752 M28X1.5 1-8 CAT50 ER40 X8.000* .120-1.025 8.000 7.250 6.580 2.480 2.752 M28X1.5 1-8 CAT50 ER50 X4.000* .396-1.338 4.000 3.250 - 3.070 2.752 M36X1.5 1-8 CAT50 ER50 X6.000* .396-1.338 6.000 5.250 - 3.070 2.752 M36X1.5 1-8 Add B for internal coolant flange. *Balance to G6.3 12000 RPM. 780