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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 350mm +-.005 inches
- This test arbor is suitable for calibrating your machine spindle
- Protective case included
- Rear thread for pull stud is 1" X 8
- MariTool Part# is CAT50-TA40-350
