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6
JAT-480,481,482 Die Grinders
Setup and Assembly
Any missing parts or damage should be reported
immediately to your JET
®
distributor. Do not use a
damaged tool. Read this instruction manual
thoroughly for operation, maintenance and safety
instructions.
Box contents:
1 Die grinder
2 Wrenches
1 Operation and parts manual
1 Product registration card
Operation
The die grinder must be
properly lubricated before operation. See
“Lubrication” section.
Figure 1 (JAT-480 shown)
1. Loosen collet nut using the two wrenches on
the flats of the collet nut and spindle (Figure
1). Keep wrench on spindle stationary while
turning wrench on collet nut.
2. Fully insert 1/4-inch shank of grinding
attachment (not included) into collet, and
retighten collet nut securely with wrenches.
3. Remove protective cap from air inlet (Figure
1). If an in-line oiler is not being used, add 4
or 5 drops of air tool oil (not included) in to
the air inlet.
4. Blow out air line to remove any dirt or
moisture, then connect air supply hose to
tool. Set air pressure to 90psi.
IMPORTANT: Connecting a quick-change
coupling directly to the tool is not
recommended, as vibration may cause the
connection to fail. Instead, add a leader hose
and install any quick-change couplings
farther down the line.
5. Grip tool with both hands and push safety
lever forward to release throttle lever. Gently
press throttle lever.
6. Release throttle lever to stop die grinder.
Maintenance
Lubrication
The die grinder should be lubricated daily (or
before each use) with air tool oil through the air
inlet. During continual operation, it should be re-
oiled every 1 to 2 hours. This can be done with an
in-line oiler, or manually. If done manually,
proceed as follows:
1. Disconnect air hose from tool.
2. Place 4 or 5 drops of air tool oil into air inlet.
NOTE: Air tool oil not provided; it is available
at most major hardware and tool stores. SAE
#10 oil or sewing machine oil may be used
as a substitute. Do not use detergent oil.
3. Re-connect air. Run die grinder at low
throttle without load for a few seconds to
distribute the oil throughout tool.
4. When finished operating die grinder,
disconnect air hose. Wipe off housing with a
dry cloth. Place 4 or 5 drops of air tool oil into
air inlet; re-connect air and run tool for a few
seconds to distribute the oil. Disconnect air.
Periodically apply 1 or 2 drops of air tool oil to
throttle lever and safety lever pivots, and work
lever to distribute the oil.
Storage
Avoid storing the die grinder in very humid
locations which promotes rusting of internal
mechanisms. Always oil the tool and disconnect
air hose before storage.
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