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ANSI B5.50 CAT Taper Dimension 

 

Model D d1 d2 d3 d4 d5 d6 d7 l1 l2 l3 l4 l5 T
CAT30 1.812 1.25 2.176 1.531 1.25 0.516 0.645 0.2813 1.875 0.188 0.735 0.64 0.44 1/2-12
CAT40 2.500 1.75 2.863 2.219 1.75 0.641 0.645 0.2813 2.687 0.188 0.985 0.89 0.44 5/8-11
CAT50 3.875 2.75 4.238 3.594 2.75 1.031 1.020 0.2813 4.000 0.250 1.485 1.39 0.44 1-8

 

CAT40, CAT50 Tool Holders are mainly used in US and Canada. CAT40 Collet Chucks are the most widely used products. 

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