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XII. RUB COLLARS
Rub collars are used when shaping curved or irregular workpieces, such as arched doors or round
table tops. They also allow you to perform freehand work.
There are two types of rub collars; solid and ball-bearing. Don’t confuse spacers with solid rub col-
lars. Spacers aren’t always machined to close tolerances and not every ball-bearing can be used as
a rub collar. Grizzly carries an extensive line of spacers and rub collars designed for use with Grizzly
shapers. See the current catalog for listings.
IMPORTANT: The diagrams shown on the following pages denote different methods and arrange-
ments for spindle stacking. These diagrams are intended as a source of general reference.
Remember to apply all of the safety considerations we have covered to this point, as well as those
to come – as they apply to your situation. If you are confused about any of the configurations, DO
NOT attempt them. Seek adequate instruction before attempting complex shaper operations.
NOTE: the following illustrations are shown with the guard removed for clarity. DO NOT attempt to
operate the shaper without guards or protective devices in place.
A. HOW RUB COLLARS ARE USED
Collars are used to limit the depth of your cuts and are particularly useful when doing pattern work
or irregular shaping. The amount of wood to be removed from the workpiece is determined by the
diameter of the rub collar and the cutting circle of the cutter. Some hints for the selection of rub col-
lars are listed below. PLEASE FOLLOW THE SAFETY MEASURES WE HAVE NOTED THROUGH-
OUT THE MANUAL.
1. Select the appropriate shaper cutter to match your desired profile.
2. Determine if you will be working with a pattern or if the workpiece will rub against the collar.
3. Determine how much wood must be removed to achieve the desired profile.
When only part of an edge is to be milled, as in Figures 17-19, the workpiece will guide itself along
the collar. If that is the case with your operation, you’ll want to select a rub collar that will allow just
the desired amount of wood to be removed. When shaping with a pattern, the shape and size of the
pattern will limit the amount of wood removed from the workpiece. The pattern gives you the option
of selecting the number of rub collars that best suits your application...depending on the size of the
pattern.