Always make sure your power
tool is unplugged when conducting
maintenance procedures!
Replacement of
Worn Shafts and Sheaths
Shafts and sheaths last longer when they are
not used at sharp angles or loops, since wear
occurs at the points of greatest friction. There
is no way to avoid ultimate wear, and under
normal conditions a flexible shaft machine may
require several replacement shafts and sheaths
during its lifetime.
To expose the inner
shaft follow steps
1, 2, and 3 on the
previous page.
Next, remove the
motor connector
with 1
″
open end or
adjustable wrench.
Motor connector has a left hand thread and
must be turned clockwise (right) for removal.
Installation of New Shaft
1.
After removing old shaft, loosen set screw
on the new flexible shaft motor coupling and
slide coupling onto motor shaft.
2.
Tighten set
screw securely
onto the flat of the
motor shaft.
3.
Grease shaft
prior to putting on
the sheath. (See
lubrication instruc-
tions on page 13.)
4.
Slide motor
connector back up
over the shaft and
tighten to the left
(counterclockwise).
5.
Slide sheath over flexible shaft with plain
fitting directed toward the motor and into the
motor connector. (Each end of the sheath has
a metal fitting. One is plain, the other has a
groove around it to fit the handpiece.)
6.
Adjust the shaft (page 5 and top right) and
tighten sheath set screw in motor connector.
Shaft and Sheath Adjustment
Place the entire
unit on a flat sur-
face with shaft and
sheath extended
straight.
Adjust the
exposed tip of the
flexible shaft at
the handpiece end so that it extends 3/4
″
(19mm) beyond the sheath.
This is done by moving the sheath in or out of
the motor connector. When the correct adjust-
ment is made, tighten the screw in the motor
connector.
Replacement of Motor Brushes
Motor brushes should be checked for wear
periodically. When new they are approximately
3/4
″
(19mm) long. Replace them when they
have worn to 1/4
″
(6mm). To remove brushes,
disconnect motor power cord and unscrew the
brush caps. Remove the worn motor brushes,
replace with new motor brushes, and screw
motor brush caps back on. Be sure to replace
both motor brushes even if one of them is less
worn than the other.
set
screw
New
Motor Brush
Motor
that needs
Brush replacement
motor
coupling
motor
shaft
IMPORTANT!
Visit www.foredom.net
How-To Videos on Foredom flex shaft
set-up, maintenance and operation!
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