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B. EXAMPLES
Rub collars may be used in any of the following positions:
1. Below the cutter.
2. Above the cutter.
3. Between two cutters.
Suppose you want to mill a
3
/8" x
1
/2" rabbet. You must have a sufficient amount of uncut wood to
provide adequate contact with the rub collar. Remember that the width of the rabbet is controlled by
the diameter of the rub collar and the depth of the rabbet is controlled by the spindle height adjust-
ment. A rabbet cut is a good example, since you’ll get the same result with the rub collars either
above or below the cutter. The following diagrams illustrate different spindle configurations.
Workpiece
Spindle
Spindle Nut
Cutter
Rub Collar
Table
Table
Spindle Assembly
Figure 17
When the rub collar is used below the cutter, as shown in Figure 17, the progress of the cut can be
observed. However, any unintentional movement may lift the workpiece into the cutter, damaging
your work and creating an unsafe situation.
Rub collar below the cutter:
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Safety Washer