Foredom Series S - Manual (Page 13)

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 condi-
tions 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 motor connector with 1
″ crescent or adjustable
wrench. Connector has a left hand thread and must be turned
clockwise (right) for removal.
Loosen set screw on the flexible shaft motor coupling and
slide shaft off the motor shaft.
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.Slide motor connector back up over the shaft and tighten to
the left (counter clockwise).
4.Grease shaft prior to putting on the sheath. (See lubrication
instructions on page 12.)
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 below) and tighten sheath set
screw in motor connector.
Shaft and Sheath Adjustment:
Place the entire unit on a flat surface with shaft and sheath extended straight.
Adjust the
exposed tip of the flexible shaft so that it extends 3/4″ beyond the sheath, as shown. This is
done by moving the sheath in or out of the motor connector. When the correct adjustment is
made, tighten the screw in the motor connector.
Replacement of Motor Brushes
The motor brushes should be checked for
wear periodically. When new, they are
approximately 3/4
″ long. Replace them
when they have worn to 1/4
″. To remove
brushes, disconnect motor power cord and
unscrew the brush caps. Be sure the curvature or contour of
the motor brush tip matches that of the outside of the
housing curve.
New Motor Brush
Motor that needs
Brush replacement
13
motor
coupling
motor
shaft