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Page 12
Assembly & Operation of Attachments
Flex-Shaft 225
Not for use with router bits. Use
with router bits will cause
kickback.
INSTALLATION INSTRUCTIONS
It is extremely important to carefully read and follow
the directions to assemble the flex-shaft to your
rotary tool below to ensure the tool will function
properly
.
Attention: For optimum per
formance, allow your new
flex shaft attachment to run at high speed on your
rotary tool in a vertical position for 2 minutes before
use.
To properly attach the flex-shaft to the rotary tool,
THREE items must be removed from the tool: the
housing cap, collet nut and collet.
Step 1. Press the Shaft lock button, unscrew and
remove the collet nut.
If you need it, single-speed models also can have
speed control by using a Model 221 foot control unit.
Not for use with variable speed
or two speed models 285 or 395.
Use with external speed control will damage the
variable/two speed electronics.
The point to remember is this: You can do the great
majority of work with the single speed at its regular
speed of 35,000 RPM. But for certain materials and
types of work, you need slower speeds — which is the
reason the variable speed models and the speed
control units are available.
To aid you in determining the optimum operational
speed for different materials and different accessories,
we have constructed a series of tables that appear on
page 24, 25 and 26. 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 slightly to get the optimum working speed.
Some rules of thumb in regard to speed:
1. Plastic and other materials that melt at low
temperatures should be cut at low speeds.
2. Polishing, buffing and cleaning with a wire brush
must be done at speeds not greater than 15,000
RPM to prevent damage to the brush.
3. Wood should be cut at high speed.
4. Iron or steel should be cut at high speed. If a high
speed steel cutter starts to chatter — this normally
means it is running too slow.
5. Aluminum, copper alloys, lead alloys, zinc alloys
and tin may be cut at various speeds, depending on
the type of cutting being done. Use paraffin or other
suitable lubricant on the cutter to prevent the cut
material from adhering to the cutter teeth.
Increasing the pressure on the tool is not the answer
when it is not performing as you think it should.
Perhaps you should be using a different accessory, and
perhaps an adjustment in speed would solve the
problem. Leaning on the tool does not help.
Let speed do the work!
Operating Speeds - (Cont.)
CAUTION
!
WARNING
!
STEP 1
DM 2610925474 10-04 10/19/04 3:40 PM Page 12
12


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