CAT - CENTER ALIGNMENT COLLET CHUCK Taper Size CAT-40 and 50 A ➚ A .00012 AT3 Taper 58-60 HRc Ra 4µin L G2.5 L2 20,000 RPM L3(1)L1Ref. D D1 G D2 (2) Hex Key(1) Hex Key(2) Designation Range L L1 L2 L3 D D1 D2 G (mm) (mm) .080-.789 4.902 2.067 4.152 3.522 1.969 2.756 1.752 5/8-11 4.0 5.0 .080-.789 4.902 2.067 4.152 - 1.969 2.756 - 1-8 4.0 5.0 793