CAT Shrink Fit Holder

CAT40 and CAT50 shrink fit tool holder, runout ≤0.003 mm, in 13 metric and 10 inch bore sizes from 3 mm to 1-1/4", balanced G2.5 at 25,000 rpm. The body is heat-resistant hot-work tool steel, designed to withstand repeated heating cycles. The slim 4.5° nose profile provides clearance in tight fixtures and deep pockets. Every model from 6 mm and 1/4" up has threaded holes for balancing screws, allowing quick fine balancing if required — better surface finish, less spindle wear. Shanks are cut to ANSI B5.50, the V flange steep taper standard for CAT tool holders. Clamps HSS and solid carbide shanks; the pull stud is ordered separately. Bore sizes and lengths are in the chart below.