Northern Industrial Tools 143379 - Manual (Page 5)

5. Replace upper spindle nut. Flange of
upper spindle nut should be facing
downward so that it seats itself in the
center reinforcement hub on the
grinding disc.
6. Push in spindle lock button (located on
the back side of the metal gear hous-
ing) and simultaneously tighten spindle
nut with spanner wrench. Be sure to
tighten nut securely.
You are now ready to begin operation of your Angle Grinder.
OPERATING YOUR GRINDER
1. Plug Angle Grinder into standard 110/120 Volt wall socket.
2. Prior to contact with material surface, pull trigger
switch to ON position.
3. Evenly and carefully, lower grinding disc surface to
material surface. Do not apply excessive pressure.
Forcing the grinder down against your work surface
puts unnecessary strain on the motor and will likely
produce undesired results in workmanship.
5. For extended work loads this tool is equipped with a
“lock ON” switch. With trigger switch engaged, press
lock switch with thumb. To release lock switch, press
the trigger switch again.
6. When finished release trigger switch. Let the grinder
come to a complete stop before resting tool on
any surface.
TECHNICAL TIPS
GRINDING
Always use side/top mount handle for control. Move the grinder back and forth in sweeping
strokes. Too much pressure, the wrong angle or improper motion may cause burning. Be
aware of your material’s reaction to the grinding disc. Some materials may throw excessive
sparks; some materials may conduct extreme heat from the point of contact.
Avoid unnecessary risks by staying alert and attentive at all times.
CUTTING
Always use side/top mount handle for control. Make sure your cutting disc is rated for AT
LEAST 11,000 RPM. Pull trigger switch and carefully apply cutting blade edge to material to
be cut. As with grinding, too much pressure, the wrong angle or improper motion may cause
burning. Be aware of your material’s reaction to the cutting disc. Some materials may throw
excessive sparks; some materials may conduct extreme heat from the point of contact. Avoid
unnecessary risks by staying alert and attentive at all times.
WARNING: To reduce the risk of injury, keep the cord away from the path of the grinder.
Otherwise the cord may be caught by the disc; this may sever the cord and expose live wires
or make the gear box electrically “live.”
Lock On Switch
ON/OFF Trigger
4