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SELECTING THE CORRECT TYPE OF
SELF-CENTERING
CHUCK
Scroll Type Self-Centering Chuck (Manual Actuated
Self-Centering - available in 2-jaw, 2-3 jaw, 3-jaw, 4-jaw, and
6-jaw models)
A scroll type self-centering chuck is actuated by using a t-handle wrench
inserted into the access holes on the outside diameter of the chuck.
When the t-handle wrench is inserted is inserted into the actuating
hole and turned clockwise it turns an internal scroll. The
actuation of the scroll in turn causes the jaws to move
simultaneously and exactly the same amount of movement toward
center. If the t-wrench is turned counter clockwise the jaws
move outward towar the outside of the chuck. Scroll chuck may
be equipped with solid one piece jaws or 2 piece jaws with a
removable top jaw.
Independent Jaw Chucks (Manual
Actuated Not Self-Centering - available with 4-jaws)
An independent jaw chuck is designed with 4 jaws which may be moved
independently of another. A t-handle wrench is used to
actuate a screw on each jaw independently. When the t-wrench
in inserted into the end of a jaw screw and turned clockwise the jaw
moves to the center of the chuck. These chucks may be
used to center an irregular shaped work part or to position a work
part off center by choice. Independent chuck are
available with solid one piece jaws or 2 piece jaws with a removable
top jaw.
Combination Jaw Self-Centering Chucks
(Manually actuated
A combination chuck combines the
scroll self-centering action of a scroll chuck with the independent
jaw movement of an independent jaw chuck. This chuck may be
used as a scroll chuck and move all the jaws simultaneously or one
jaw at a time. Combination chucks are available with 2 piece
jaws with a removable top jaw.
Drawtube Actuated Self-Centering Chuck
Drawtube actuated chucks are power
actuated by using hydraulic or air cylinder to move a drawtube in
the center of the chuck forward or backward. The movement of
the drawtube clamps or unclamps the jaws. These chucks are
self-centering. Drawtube actuated self-centering chucks are available
with 2 piece jaws with a removable top jaw.
Front Mounted Self-Contained
Self-Centering
Chuck
These chucks are mounted on the front
or the lathe spindle. The chuck is designed with a an
integrated self-contained air or hydraulic air cylinder used clamp
or unclamp the jaws in a self-centering action. Front mounted
self-contained self-centering chucks are available with 2 piece jaws with a
removable top jaw.
SELECTING THE CORRECT SPINDLE MOUNT
FOR YOUR SELF-CENTERING CHUCK APPLICATION
SHORT TAPER SPINDLES
For the short taper
self-centering chuck spindle noses Type A, D and C (DIN)
measure the pilot diameter and length, bolt circle diameter and
diameter of the holes.
In the case of an A type mount check the number of bolt circles (one
for A2 and two for A1). All chucks with a1 mount can be
installed on a-1 spindle nose only.
all chucks with A2 mount can be installed on A1 or A2 spindle noses.
LONG TAPER SPINDLES
For the long taper spindle noses (Type L), check the pilot diameter,
length and thread size.
THREADED SPINDLES
For the threaded spindle noses, check the thread diameter, number of
threads per inch and length, pilot diameter and length, plus overall
length.
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