Description
This larger chuck takes up no more center-to-center space than the 2.5″ chuck, but it will hold larger work. It has a clamping range of 3/32″ (2 mm) up to 1-1/2″ (38 mm) diameter with the jaws in the normal position. With the jaws in the reversed position, work up to 3-1/4″ (82.5mm) can be gripped. The hole through the chuck is .687″ (17 mm). Rotating the knurled ring closes all three jaws simultaneously to grip round or hexagonal stock quickly. Tommy bars (provided) are used in the side holes to tighten and loosen the chuck for more leverage. The chuck has a 3/4-16 thread to fit Sherline’s spindle.
Chuck Diameter3.1″
Jaw Capacity with jaws in normal position: 3/32″ (2mm) – 1-1/2″ (38mm)
With jaws in reverse position: 1/4″ (6 mm) – 3-1/4″ (82.5mm)
Through Hole Diameter.687″ (17mm)
Thread Size3/4-16
Chuck Body Material12L14 Steel
Chuck Jaws Material12L14 Case Hardened Steel
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