HSK - SHORT ER COLLET CHUCK - METRIC Taper SizeHSK-A 63 and 100 A ➚ A .003 58-60 HRc N5 L2Ref G2.5 20,000 RPM HSK G1 D L1Ref L Ref Designation HSK-A Range D L L1 L2 G1 HSKA63ER32SHORT 63 2-20 50 84.5 56.1 9.5 M40x1.5 HSKA100ER32SHORT 100 2-20 50 89.5 60.5 9.5 M40x1.5 HSKA100ER40SHORT 100 3-26 70 104.5 75.5 9.5 M50x1.5 772