Sherline PN 1076C 4-Jaw Self Centering Chuck Nickel-Teflon coated

This chuck will hold parts from 3/32″ in diameter up to 1-1/2″ with jaws in the normal position and up to 2-3/4″ with the jaws reversed.
This chuck is identical to P/N 1076 except for an electroless Nickel-Teflon coating that has been applied to help prevent wear and corrosion. This special coating has been applied to all external and internal surfaces of the chuck (except for chuck jaws), significantly improving the life of the chuck. This chuck also opens and closes more smoothly due to the lubrication properties of Nickel-Teflon.

  • Hardened steel reversible jaws
  • Hold parts from 3/32 to 1-1/2 in regular position, to 2-3/4 with jaws reversed
  • Jaws scroll together when outer ring of chuck is turned for quick centering of material
  • 4 jaws hold round, square or tubular stock
  • Includes two spindle bars for adjustment

This chuck combines the ease-of-use advantages of the 3-jaw chuck with some of the advantages of a 4-jaw chuck. It will automatically center square or round stock. (The stock must be accurately shaped for all four jaws to grip.) It will also grip thin-wall tubing in four places rather than three, which spreads out the load and allows more grip without crushing the tubing.

Turning the knurled portion of the outer diameter of the chuck scrolls all four jaws in unison. Included with the chuck are two Tommy bars for tightening and loosening the chuck.

Centering accuracy on self-centering chucks is to within a few thousandths of an inch. If perfect centering accuracy is required, see the section on 4-jaw independent jaw chucks.