Also available with 0.000010" (10 millionths) (2.5µ) repeatability. Master Jaws move at perfect right angle to centerline of spindle.
Unit of Measure



N/A 4 Inch100 mm

Repeatability (Max. Concentricity)

N/A 0.000010" (10 millionths) (2.5µ) 0.0001 (2.5µ) T.I.R.

Repeatability (Max. End Lengths)

N/A 0.0001 (2.5µ) T.I.R.

Max. Jaw Opening

N/A 0.027 Inch0.69 mm

Force per Jaw

N/A 625 lb284 kg

Weight (with Aluminum Jaws)

N/A 4 3/4 lb2.16 kg

Weight (with Steel Jaws)

N/A 5 1/4 lb2.39 kg

Counterbore Size

N/A 5/16 Inch7.94 mm

Counterbore Depth

N/A 0.73 Inch18.54 mm

Top Jaws

N/A Located on hardened steel pins in master jaws & secured by socket head cap screws



N/A Class 80 Ductile Cast Iron

Master Jaws

N/A Hardened Steel


N/A Hardened Steel

Air Cylinder

N/A Aluminum, O-Ring Sealed