Ryobi AG402 - Manual (Page 9)

9 - English
WARNINg :
Always install grinding wheel and abrasive mop disc with
the depressed center against the disc flange as shown
on the opposite page. Failure to do so will cause the
grinding wheel to crack when tightening the clamp nut.
This could result in serious personal injury because of
loose particles breaking off and being thrown from the
angle grinder. Do not overtighten.
 Thread the flange nut on the spindle with the flat side of nut
facing up. Fit raised, small diameter portion of the clamp
nut into the hole in the wheel and finger tighten.
 To install abrasive mop disc, thread the nut on the spindle
with the flat side of flange nut facing down. Finger
tighten.
 Depress and hold the spindle lock button and rotate the
wheel clockwise until the spindle locks in position.
 Securely tighten the nut with the wrench provided.
Do not overtighten.
DANgER:
Never attach a wood cutting or carving blade of any type
to this angle grinder. It is only designed for grinding and
sanding. Use for any other purpose is not recommended
and creates a hazard, which will result in serious injury.
DANgER:
Use ONLY Type 27 depressed center wheels (such
as the one provided with this product). NEVER attach
a Type 1 straight or cut-off wheel to this angle grind-
er. This product is only designed for grinding and
sanding. Use for any other purpose is not recommended
and creates a hazard, which will result in serious injury.
Type 27 − OK TO use Type 1 − dO nOT use
OPERATION
gRINDINg AND SANDINg
See Figures 4 - 5, page 11.

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.
  The abrasive mop disc is suitable for sanding flat metal
or wood surfaces.
 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.
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.