Instructions
thread and rst jaw tooth without binding. Therefore, never
use force when replacing the jaws, and if binding occurs,
back up the scroll slightly and wiggle the jaw until it is
free to move in the slot. Advance the scroll and repeat for
the second and third jaws. The scroll thread must engage
the rst tooth in the rst, second and third jaws in order.
A set of replacement jaws is available as P/N 1141. Should
it become necessary, please return your chuck to the factory
so that we can replace the jaws and check the alignment
before returning it to you. In the case of a damaged chuck
body, replacement of the entire chuck is usually more
economical than attempting repairs.
ER-16 Chucks
Introduced in early 2014, the P/N 1042 3.1" 3-jaw self-
centering chuck is now offered with a 22 x 1.5 mm thread
for use on the optional ER-16 spindle nose for the headstock.
It is used in the same way as a standard chuck but now
offers those who opt for the ER-16 collet option a way to
use a Sherline chuck on their lathe.
Removing a Stuck Chuck from the Spindle
Use one tommy bar in the hole in the spindle and
another tommy bar in a hole in the rear ring of the chuck
body to achieve enough leverage to unscrew the chuck
(counterclockwise) from the spindle thread. If the chuck
becomes stuck on the spindle thread, put a tommy bar in the
hole in the chuck body. Place a block of wood against the
tommy bar where it enters the chuck. With a small mallet,
give the block of wood a sharp tap, turning the chuck in a
counter-clockwise direction. It should not be necessary to
hold the spindle, as its inertia should be sufcient. (Don't
hit the tommy bar anywhere other than right where it enters
the chuck or you could bend it.) This small but sharp force
at the outer edge of the chuck should break the thread loose
and the chuck can then be unscrewed by hand or with the
tommy bars.
Lubrication and Maintenance
Clean chips from the jaw slots with a brush and add
lubrication to keep the chuck operating smoothly. To
prevent rust, keep the surfaces of the chuck lightly oiled.
If possible, store wrapped in the waxed paper it came in.
Thank you,
Sherline Products Inc.
P/N 1040, Pg. 2 OF 2