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used.(See Figure 4)
The speed of Rotary Tool is controlled by setting the yellow speed control buttons.
Settings for Approximate Revolutions
Speed Setting
1
2
3
4
5
Needs for Slower Speeds
Certain materials, however, (some plastics and precious metals, for example)
require a relatively slow speed because at high speed the friction of the accessory
generates heat and may cause damage to the material.
Slow speeds (13,000 RPM or less) usually are best for polishing operations employ-
ing the felt polishing accessories. They may also be best for working on delicate
projects as delicate wood carving and fragile model parts. All brushing applications
require lower speeds to avoid wire discharge from the holder.
Higher speeds are better for carving, cutting, shaping, cutting dadoes or rabbets in
wood.
Hardwoods, metals and glass require a high-speed operation, and drilling should
also be done at high speeds.
Many applications and accessories in our line will provide the best performance at
full speed, but for certain materials applications, and accessories, you need slower
speeds, which is the reason our variable speed models are available.
To aid you in determining the optimum operating speed for different materials and
different accessories, we have constructed a series of tables. By referring to these
tables, you can discover the recommended speeds for each type of accessory. Look
these tables over and become familiar with them.
Ultimately, the best way to determine the correct speed for work on any material is to
practice for a few minutes on a piece of scrap, even after referring to the chart. You
can quickly learn that a slower or faster speed is more effective just by observing
what happens as you make a pass or two at different speeds. When working with
plastic, for example, start at a slow rate of speed and increase the speed until you
observe that the plastic is melting at the point of contact. Then reduce the speed
Speed Range
8,000 RPM
13,000 RPM
18,000 RPM
24,000 RPM
35,000 RPM
- 12 -
Fig.4
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