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- Collet Chuck accepts all ER20 collets
- Works on all BT40 machines with Dual Contact spindles
- Compatible with BIG-PLUS® spindles
- Threaded for stop screw type 1 (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 80mm (3.2 inches)
- Concentricity is less than .0001 at collet face
- Collet nut is included
- Coolant through capability
- Rear thread for pull stud is M16 X 2.0
- MariTool Part# is BT40-ER20-80D
*BIG-PLUS® is a trademark of Daishowa Seiki Kabushiki Kaisha; Big Daishowa Seiki Co., Ltd., Corp.
Compatible with BIG-PLUS® spindles, but not licensed.