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• CAT40 Collet Chuck accepts all ER25 collets
• Works on all CAT 40 machines
• Threaded for stop screw type 2 (not included)
• All critical tool holder surfaces precision ground
• Made from alloy steel hardened to 54 - 56rc
• Balanced to G2.5 at 20,000 rpms
• Gage length is 100mm (4.0 inches)
• Concentricity is less than .0001 at collet face
• Collet nut is included
• Mini Collet Nut is slimmer than standard collet nut
• ER25 Mini Nut has an id thread of 30mm X 1.0 pitch. Outside diameter is 1.377 inches (35mm)
• Must use ER25M collet wrench
• Coolant thru capability
  
• Rear thread for pull stud is 5/8—11
• MariTool Part# is CAT40-ER25-4.0M