Bosch 1974-8 Consignes De Fonctionnement/Sécurité page 14

1609929T61.qxp_1974 8/18/16 1:32 PM Page 14
tool, since torque from the motor can cause the
tool to twist.
Start the tool before applying to work and let
the tool come to full speed before contacting
the workpiece. Lift the tool from the work
before releasing the switch. DO NOT turn the
switch "ON" and "OFF" while the tool is
under load; this will greatly decrease the
switch life.
"TRI-CONTROL" PADDLE SWITCH
(Models 1974-8 & 1994-6 only)
The "Tri-Control"
Paddle Switch enables
the operator to control
the switch functions of
"Lock-OFF", "ON/OFF"
and "Lock-ON".
TO UNLOCK SWITCH AND TURN TOOL
"ON": Push paddle lever FORWARD (toward
the spindle) then squeeze the paddle lever.
TO SWITCH TOOL "OFF": Release pressure
on paddle lever. The switch is spring loaded
and will return
automatically.
The "Lock-ON" feature, incorporated into the
paddle switch, is a convenience for long
operations.
TO LOCK SWITCH "ON": After paddle switch
has been activated push paddle lever
completely FORWARD and release paddle
lever.
TO SWITCH TOOL "OFF": Squeeze and
then release paddle lever. The switch is
spring loaded and will return to "OFF"
position automatically.
PADDLE SWITCH WITH
"LOCK-OFF "FEATURE
(Models 1974-8D & 1994-6D only)
The Paddle switch enables the operator to
control the switch functions of "Lock-OFF",
and "ON/OFF".
TO UNLOCK SWITCH AND TURN TOOL
"ON": Push paddle lever FORWARD (toward
the spindle) then squeeze the paddle lever.
TO SWITCH TOOL "OFF": Release pressure
on paddle lever. The switch is spring loaded
and will return to "OFF" position automatically.
14
*Always follow manufacturer instructions*
Operating Instructions
Hold the tool with both
hands while starting the
to "OFF" position
*AAA Rent-All 225-291-1356*
SELECTING GRINDING WHEELS
Before using a grinding wheel, be certain that
its maximum safe operating speed is not
exceeded by the nameplate speed of the
grinder. Do not exceed the recom mended
wheel diameter.
DISC GRINDING WHEELS
Grinding wheels should be carefully selected
in order to use the grinder most efficiently.
Wheels vary in type of abrasive, bond,
hardness, grit size and structure. The correct
type of wheel to use is determined by the job.
Use disc grinding wheels for fast grinding of
structural steel, heavy weld beads, steel
casting, stainless steel and other ferrous
metals.
GRINDING TIPS
Efficient grinding is achieved by controlling
the pressure and keep ing the angle between
wheel and workpiece at 10° to 15°. If the
wheel is flat, the tool is difficult to control. If
the angle is too steep, the pressure is
concentrated on a small area causing
burning to the work surface.
Excessive or sudden pres-sure on the wheel
will slow grinding action and put dangerous
stresses on the wheel.
When grinding with a new wheel be certain
to grind while pulling tool backwards until
wheel becomes rounded on its edge. New
wheels have sharp corners which tend to
"bite" or cut into work piece when pushing
forward.
CUTTING METAL
Using the optional Type 1A wheel guard, it is
possible to perform limited cutting on small
stock such as metal tubes, piping or rebar.
When cutting, work with moderate feed,
adapted to the material being cut. Do not
exert side pressure onto the cutting disc, tilt
or oscillate the tool. When cutting profiles
and square bar, it is best to start at the
smallest cross section.
Always follow precautions for kickback.
Do not apply side pressure to cutting wheel
to reduce wheel speed.
The tool should always be used so that
sparks are directed away from user.