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- Precision ground all diameters concentric within 3 microns
- Made from alloy steel hardened to 54 - 56rc
- Calibration certificate is included
- Arbor diameter is 40mm in diameter
- Gage length 250mm (Please Note gage length is not calibrated, see our TPC masters for calibrated gage lengths)
- This test arbor is suitable for calibrating your machine spindle
- Protective case included
- Rear thread for pull stud is 5/8–11
- MariTool Part# is CAT40-TA40-250
