Rub Collars - Grizzly G9933 Instruction Manual

Rub Collars

Rub collars are used when shaping curved or
irregular workpieces, such as arched doors or
round table tops. Rub collars also limit the depth
of your cut.
There are two types of rub collars—solid and ball-
bearing. We recommend against the use of solid
rub collars. Grizzly carries an extensive line of
ball bearing rub collars designed for use with
Grizzly shapers. See the current catalog for list-
ings.
It is possible to use the rub collars in any of the
following positions:
1. Rub collar below the cutter: When the rub
collar is used below the cutter as shown in
Figure 24, the progress of the cut can be
observed. However, any unintentional move-
ment may lift the workpiece into the cutter,
damaging your work and possibly kicking the
workpiece back toward you with great force.
We do not recommend this position!
Figure 24. Rub collar installed below cutter.
Whenever the cutterhead is above the
workpiece, or you can see it spinning dur-
ing use, you must take extreme caution to
keep your hands away from the cutterhead.
Failure to do so may cause serious per-
sonal injury.
-22-
2. Above the cutter (preferred method—
safer): When the rub collar is used above
the cutter as seen in Figure 25, the cut can-
not be seen. This offers some advantage:
the stock is not affected by slight variations
in thickness and accidental lifting will not
damage the workpiece. If lifting occurs, sim-
ply correct the mistake by repeating the
operation.
Figure 25. Rub collar installed above cutter.
3. Between two cutters: Using a rub collar
between two cutters, as in Figure 26, has
the distinct advantage of performing two cuts
at once or eliminating the need to change
cutters for two different operations. Notice
that part of the edge is left uncut. The uncut
portion rides on the rub collar.
Figure 26. Rub collar between two cutters.
G9933 Three Spindle Shaper