3.1"
Diameter 3-Jaw Self-centering Chucks...
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 from 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 2-
3/4" (70 mm) can be
gripped.
The hole through the chuck is .687" (17 mm).
Rotating the knurled ring
closes all three jaws simultaneously to quickly grip
round or hexagonal stock.
Tommy bars (provided) are used in the holes in
the side to tighten and loosen
the chuck for more leverage. The chuck has a
3/4-16 thread to fit Sherline's
spindle and other machines using that thread.
New!
Electroless
Nickel Boron Coated
3-Jaw Self-centering Chuck (P/N
1040C)...
This chuck is
identical to P/N 1040 except for an electroless
nickel boron 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
boron. Other benefits and features of the
electroless nickel boron coating
include the following:
-
Ductile plating with columnar
structure
-
Harder
than any other nickel-based coating
-
Coating uniformity that eliminates post-plate
grinding (or burnishing)
-
Wear
properties overall superior to hard
chromium
-
Hardness (68-72 Rc)
-
Low
coefficient of friction (.044) Teflon™ is
.04
-
Uniform
coating thickness up to .004”
-
Accepts dry film lubricants
Jaw Tightness
on Scrolling Chucks...
Sherline technicians custom grind
each jaw to fit its own slot with as little play as
possible. Grinding is done
to within .0001". This assures maximum accuracy.
If you have sent in an old chuck
for jaw replacement or are replacing an old, worn
chuck, you will notice that
the new one is initially harder to turn than your
worn one. As chucks wear, they
become looser and easier to turn. Some users
like a chuck that turns easily
right from the start for quick part changes, where
maximum accuracy is not as
important as speed and ease of use. In your
preference, Sherline makes and sets
aside a certain number of chucks with less tightly
fit jaws. If your job calls
for repetitive, quick part changes and you can
accept a little less centering
accuracy
Click
for details