CAT - DRILL CHUCK ARBOR Taper Size CAT-40 and 50 A ➚ A .00020 AT3 Taper 58-60 HRc Ra 4µin L .750 .630 K G D Designation K L D G CAT40 DC J2X1.500 J2 1.500 1.752 5/8-11 CAT40 DC J3X1.500 J3 1.500 1.750 5/8-11 CAT40 DC J33X1.500 J33 1.500 1.752 5/8-11 CAT40 DC J4X1.500 J4 1.500 1.752 5/8-11 CAT40 DC J6X1.500 J6 1.500 1.752 5/8-11 CAT50 DC J2 X1.500 J2 1.500 2.752 1-8 CAT50 DC J3 X1.656 J3 1.656 2.752 1-8 CAT50 DC J33X1.500 J33 1.500 2.752 1-8 CAT50 DC J4 X1.500 J4 1.500 2.752 1-8 CAT50 DC J5 X1.625 J5 1.625 2.752 1-8 CAT50 DC J6 X1.500 J6 1.500 2.752 1-8 790