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16
OPERATING THE ROTARY TOOL
See Figure 10.
Learning to use the rotary tool:
Hold the tool in your hand and get used to its weight,
balance, and the taper of the housing. This taper permits
the tool to be grasped like a pencil.
Examine the rotary tool accessories carefully. Damaged
accessories can fly apart as they come up to speed and
should not be used. The use of damaged accessories
can result in serious personal injury.
Practice on scrap materials first to see how the tool
operates. Keep in mind that the work is done by the speed
of the tool and by the accessory in the collet. You should
not lean on or push the tool into the work.
It is best to make a series of passes with the tool rather than
attempt to do all the work in one pass. To make a cut, pass
the tool back and forth over the work like you would a small
paint brush. Cut a little material on each pass until you reach
the desired depth. For most work, a gentle touch is best;
you will have greater control, make fewer errors, and get the
most efficient work out of the accessory.
For the best control in close work, grip the tool like a pencil
between your thumb and forefinger.
A “hand grip” method of holding the tool is used for operations
such as grinding a flat surface or using cut-off discs.
To operate the rotary tool:
� Secure all work in a vise or clamp to a workbench to
prevent it from moving under the tool.
Hold the tool in front and away from you, keeping the tool
accessory clear of the workpiece.
� Turn on the tool and let the motor and accessory build
up to full speed.
� Lower the tool gradually until the accessory contacts the
workpiece.
Move the tool continuously at a steady, consistent
pace.
Use just enough pressure to keep the tool from chattering
or bouncing.
NOTE: Heavy pressure will decrease the tool’s speed and
put a strain on the motor. The weight of the tool alone is
adequate for most jobs.
� Lift the tool away from the workpiece before turning off
the tool.
OPERATION
Fig. 10
PENCIL HOLDING
METHOD