CUTTING SCREWS AND BOLTS
A reinforced cuto; wheel is the
weapon of choice. Clamp the bolt in
a pair of vise grips, and turn up the
speed to about 25,000rpm. Make
sure the wheel is perpendicular
to the bolt, and apply light, even
pressure. Continue steadily until
you’ve made it all the way through
the bolt, being careful not to put
sideways or twisting pressure on the cuto; wheel. Caution: Both the bolt and the cut
end will be extremely hot, so work over the top of your bench, not on your lap.
Trimming a body with scissors often
leaves rough edges and “nibble
marks,” especially on curves. Install a
sanding drum and adjust your rotary
tool for a low to medium speed, and
use a light touch to carefully grind
away the excess Lexan with smooth,
even strokes. Keep the tool moving,
and work your way around the body.
To finish things o;, use a felt wheel
at about 5,000rpm to bu; the
POLISHING BALL STUDS AND
;ere are a couple of ways to
tackle this one. First, if you have an
adjustable chuck or a set of collets
that fits your hingepins, simply chuck
your pins directly into the rotary tool.
Adjust the speed to a low setting,
apply a little metal polish to a rag,
and carefully polish each pin. Be
careful not to get the rag caught in
the chuck. If you aren’t able to chuck
your pins, just use a felt wheel in your rotary tool at a maximum speed of 10,000rpm
to polish the pins.
SLOTTING STRIPPED SCREWS
If you strip a screw, a rotary tool
with a cuto; wheel makes it easy to
slot the screw head so that you can
remove it with a bladed screwdriver.
To minimize scarring of the chassis
when slotting a countersunk screw,
use a cuto; wheel with a small
diameter, and don’t slot the screw
any deeper than necessary.
;e more you use your rotary tool, the more uses you will find for it. Respect your
rotary tool and be safe, but don’t be afraid to experiment. ;e next time you’re at the
hardware store or hobby shop, pick up a few bits that look interesting. Play around
with some scrap material, old parts, or whatever else you have lying around, and see
what the di;erent bits will do. Once you’ve used a rotary tool, you’ll wonder how you
ever got anything done without it. ✇
When it comes to
grinding metal, this is
what you need.
Brushes are available
with various types of
wire or plastic bristles
in di;erent shapes for a
multitude of jobs. For RC,
wire brushes are often
used to remove rust and
to scu; surfaces before
You simply cannot
function without one of
these. Most rotary tools
hold an 1/8-inch shaft, so
an 1/8-inch drill bit
fits right in.
;is is your all-purpose cutting
accessory. Available in standard
(thin but brittle) and fiberglass-reinforced (thicker but more
durable) versions. Get both.
Without the right bits, your rotary tool is little more
than a fancy paperweight. Large sets of bits are
available at hardware stores as well as at bulk retailers,
such as Costco. Whether or not you buy your bits
individually or in a set, here are the top bits you
absolutely must own:
An adjustable chuck will
let your rotary tool hold a
variety of drill-bit sizes.
used to remove rust and
Any task that involves
smoothing or reshaping needs
one of these. It’s best for soft
materials like wood and plastic.