Also available with 0.000025" (25 millionths) (0.64µ) repeatability. Master Jaws move at perfect right angle to centerline of spindle.
Unit of Measure



N/A 4 Inch104 mm

Repeatability (Max. Concentricity)

N/A 0.000025" (25 millionths) (0.64µ) 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 0.250 Inch6.35 mm

Force per Jaw

N/A 645 lb293 kg

Weight (with Aluminum Jaws)

N/A 7.5 lb3.41 kg

Weight (with Steel Jaws)

N/A 8 lb3.64 kg

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 and Stainless Steel, O-Ring Sealed