Maintenance Procedures; Motor Cleaning & Lubrication - FOREDOM SR Series Owner's Manual

Do Not
Do This!
Shaft Tips
Key Tip
Minimum
Operating
Radius
Square Drive
Slip Joint
4" radius
Do not bend shaft and sheath at a
tight angle!
When operating your Foredom tool be
careful not to bend the flexible shaft too
much at either the handpiece or motor
shaft connections. Shafts and sheaths
last longer when they are used without
sharp bends. If used at angles or loops,
wear will occur at the points of greatest
friction. Excessive heat and wear will
occur if the bend is too great.
Torsional Breaking Point:
Key Tip (Standard) Shaft
Square Drive Shaft
Slip Joint (European) Shaft 24in.–lb
Follow these guidelines for trouble-
free use: a 4"or larger radius,
shown, should be maintained for shafts on
all motors. There is no way to avoid ulti-
mate wear and under normal conditions a
flexible shaft machine may require several
replacement shafts and sheaths during its
lifetime. (Follow shaft and sheath assem-
bly instruction in the Assembly section of
this manual.)

Maintenance Procedures

Always make sure your power
tool is unplugged when you do
maintenance procedures!
It is very important to routinely clean
your Foredom
the shaft (NOT the motor or the hand-
piece), especially in areas that generate
a lot of dust.
Dirt and improper lubrication are the most
common causes of poor operation and
excessive wear.
Always disconnect power tool before
cleaning or servicing.
Note: The motor has permanently
lubricated ball bearings and does
not require additional lubrication.
Routine
Cleaning of
Motors
Foredom Motors
need air circula-
tion through the
motor housing to remove waste heat and
cool the windings. Inlet and outlet slots
provide the means for air flow. However,
saw dust and conductive debris (like metal
filings or gold dust) can enter in through
these slots. If not cleaned regularly, dust
can collect, making a bridge between parts,
causing an electrical short.
In high dust environments, Foredom
recommends cleaning the motor every
40 hours of use.
To remove dirt and dust buildup, motor
brushes should be removed and air should
24in.–lb
be blown through the motor with com-
50in.–lb
pressed or canned air. The motor brushes
should be cleaned also and checked
for wear.
Routine Cleaning & Lubrication
of Flexible Inner Shaft
as
The shaft should be checked, wiped clean,
and relubricated with grease every 40 hours
of use. With every 200 hours of use, the
shaft should be thoroughly cleaned with
solvent and lubricated. Use Foredom flex
shaft grease (p/n MS10006) or high quality
white lubricating grease.
Power Tool and lubricate
®
6
Exposing the Inner Shaft
1. Remove handpiece (see page 4).
2. Loosen the set
2
screw on the motor
connector.
3. Slide outer
sheath out
of motor
3
connector and wipe
inner shaft clean.
4. Apply a very light
coating of lubrica-
tion to shaft starting
at the top and work-
4
ing downward to
about one inch from
the handpiece end.
Apply grease with
your finger tip or
small brush. Don't overdo, apply a light film
of grease. Once the machine is running, the
shaft itself will spread the grease. If too much
grease is applied, the excess will work its way
into the handpiece and eventually seep out
between the handpiece and sheath. For this
reason, apply a bit less near the handpiece
end of the shaft.
Never operate the motor with the
outer sheath removed from the
flexible shaft.
5. Replace and
adjust sheath so
that shaft key
tip extends 3/4"
(19mm) from IMPORTANT!
the sheath.
Retighten the set screw in motor connector.
See page 4, No. 2.
6. Clean outside of sheath by wiping with
a cloth.
7. Hang motor over a trash can and run it
for about 10 minutes before attaching the
handpiece. This provides enough time for
the grease to warm up, spread and drain
off. Wipe off any excess grease at tip end
of sheath.
8. Re-attach handpiece. See page 4.