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- This metric end mill holder accepts all 20mm (.7874 inch) shank tooling
- Works on all BT30 machines with Dual Contact Spindles
- Compatible with BIG-PLUS® spindles
- 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 .9 inches
- Concentricity is less than .0001
- Rear thread for pull stud is M12 X 1.75
- MariTool Part# is BT30-EM20-.9D
*BIG-PLUS® is a trademark of Daishowa Seiki Kabushiki Kaisha; Big Daishowa Seiki Co., Ltd., Corp.
Compatible with BIG-PLUS® spindles, but not licensed.