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- Collet Chuck accepts all ER40 collets
- Works on all CAT 50 machines with Dual Contact spindles
- Compatible with BIG-PLUS® spindles
- 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 4.0 inches
- Concentricity is less than .0001 at collet face
- Collet nut is included
- Rear thread for pull stud is 1" X 8
- MariTool Part# is CAT50-ER40-4.0D
*BIG-PLUS® is a trademark of Daishowa Seiki Kabushiki Kaisha; Big Daishowa Seiki Co., Ltd., Corp. and is used only for identification purposes.
Compatible with BIG-PLUS® spindles, but not licensed.
