Purpose and Use of a 4-Jaw Chuck
There are two types of 4-jaw chucks:
independent jaw chucks and self-centering chucks. SHERLINE offers both.
INDEPENDENT JAW CHUCKS...
4-Jaw independent jaw chucks have four advantages over a 3-Jaw Chuck. One,
they can be used to hold irregular shaped parts. Two, with the use of a
dial indicator, they can be used to center parts with a great deal of
accuracy. Three, 4-Jaw Chucks can be used to deliberately hold a part off
center; and Four, they can clamp stock in a tighter grip. This is a
valuable asset when machining cams, crankshafts and other similar parts.
The disadvantage of the 4-Jaw Chuck is that the jaws must be individually
set, adding considerable time to bar stock set-ups.
Like the SHERLINE 3-Jaw Chucks, the
4-Jaw Chucks can be used to clamp externally or internally. The grip range
(size of part that can be held in the chuck) is noted below for each
Although we recommend the purchase of
the 3-Jaw Chuck to make the Models 4000A, 4400A or 4500A Lathe less
cumbersome to use for standard lathe projects, the 4-Jaw Chuck could be
considered the accessory that could add the most versatility to your
machine. However, if you have definite projects in mind where you feel the
4-Jaw Chuck would be more useful, or if you already own a 3-Jaw chuck, the
"A Package" Lathes may be ordered with the 4-Jaw substituted
upon special request.