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- Arbor diameter is .500 inches
- Works on all BT30 machines with Dual Contact Spindles
- Compatible with BIG-PLUS® spindles
- All critical surfaces precision ground
- Made from alloy steel hardened to 54 - 56rc
- Gage length is 1.5 inches
- Concentricity is less than .0002 at face and arbor
- Tool holder is coolant thru (coolant thru arbor screw not supplied). Read more here Shell Mill Holder FAQ
- Lock screw thread is 1/4-28
- Size of drive pins are .250 inches
- Rear thread for pull stud is m12 x 1.75
- MariTool Part# is BT30-FMA.500-1.5
*BIG-PLUS® is a trademark of Daishowa Seiki Kabushiki Kaisha; Big Daishowa Seiki Co., Ltd., Corp.
Compatible with BIG-PLUS® spindles, but not licensed.