Ryobi AG402 - Manual (Page 11)

11
OPERATION
FLANGE
NUT
GRINDING
WHEEL
DISC
FLANGE
SPINDLE
SPINDLE
LOCK BUTTON
FLAT(S)
WRENCH
TO
TIGHTEN
TO
LOOSEN
Fig. 4
GRINDING AND SANDING
See Figures 4 - 5.

Always carefully select and use grinding wheels that are
recommended for the material to be ground.
 Make sure that the minimum operating speed of any
accessory wheel selected is not less than 11,000 RPM.
 The grinding wheel provided with the angle grinder is suit-
able for grinding welds, preparing surfaces to be welded,
grinding structural steel, and grinding stainless steel.
 Secure all work before beginning any operation.
 Secure small workpieces in a vise or clamp to a work-
bench.
 The key to efficient operation is by controlling the pres-
sure and surface contact between the grinding wheel and
workpiece.
 Flat surfaces are ground at an acute angle, normally
between 5 ° and 15°.
 For maximum control, hold the angle grinder in front and
away from you with both hands, keeping the grinding
wheel clear of the workpiece.
 Start the angle grinder and let the motor and grinding
wheel build up to full speed.
 Gradually lower angle grinder until the grinding wheel
contacts the workpiece.
 For best results keep the angle grinder tilted at an angle
from 5 ° and 15° and continuously moving at a steady,
consistent pace.
 Move the angle grinder back and forth or up and down
over the work area.
 Keep the angle grinder moving so that an excessive
amount of material is not removed from one area.
 If the angle grinder is held in one spot too long, it will
gouge and cut grooves in the workpiece.
 If the angle grinder is held at too sharp an angle, it will
also gouge the workpiece because of concentration of
pressure on a small area.
 Use just enough pressure to keep the angle grinder from
chattering or bouncing. Heavy pressure will decrease its
speed and put a strain on the motor.
 Normally the weight of the tool alone is adequate for most
grinding jobs.
 Use light pressure when grinding jagged edges or loose
bolts where there is the potential for the angle grinder to
snag on the metal edge.
 Lift the angle grinder away from the workpiece before
turning the angle grinder off.
NOTE: Only the grinding wheel is included with this tool.
Fig. 5
5° TO 15°
WARNING:
Before performing any adjustment, make sure the tool
is unplugged from the power supply and the switch is in
the OFF ( O ) position. Failure to heed this warning could
result in serious personal injury.