Ryobi AG453K - Manual (Page 10)

10 - English
 To release the lock, depress and release the switch
trigger.
If the lock-on feature is engaged during use and the angle
grinder becomes disconnected from the power supply,
disengage the lock-on feature immediately.
NOTICE:
Never cover air vents. They must always be open for
proper motor cooling.
90˚ ROTATING HANDLE
See Figure 4, page 12.
The handle on the angle grinder can rotate 90˚ to the left or
the right for ease of operation.
To adjust the 90˚ rotating handle:

Press and hold handle lock button.
 Rotate the handle to the desired position and release the
handle lock button.
NOTE: Make sure the handle lock button on the 90˚ rotating
handle clicks and locks into place when changing handle
positions.
POSITIONING THE GUARD
See Figures 5 - 6, page 13.
Never use the angle grinder without the guard in place and
properly adjusted.

Unplug the angle grinder.
 Using the wrench provided, loosen and remove flange
nut, grinding wheel, and disc flange from spindle if nec-
essary.
 Unlock the guard clamp lever.
 Rotate the guard to its correct position as shown in
figure 5.
 Lock the guard clamp lever.
 Tighten clamp screw securely if needed.
WARNING:
Never place the guard so that it is on front of the angle
grinder as shown in figure 6. This could result in serious
injury because sparks and loose particles thrown from
the grinding wheel would be directed toward the operator.
Always place the guard in the correct location as shown
in figure 5.
DANGER:
Never use your grinder with the guard removed. It has
been designed for use only with the guard installed.
Attempting to use grinder with guard removed will result
in loose particles being thrown against the operator
resulting in serious personal injury.
OPERATION
GRINDING AND SANDING
See Figures 7 - 8, page 13.
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 suitable for grinding welds,
preparing surfaces to be welded, grinding structural steel,
and grinding stainless steel.
To operate the grinder:

Secure all work before beginning any operation. Secure
small workpieces in a vise or clamp to a workbench.
 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.
 Keep the angle grinder tilted at an angle from 5 ° and 15°.
WARNING:
To prevent loss of control and possible serious personal
injury, always operate the grinder with both hands, keep-
ing one hand on the side handle.
 Move the angle grinder continuously at a steady, consis-
tent pace.
NOTICE:
If the grinder is held in one spot too long, it will gouge
and cut grooves in the workpiece. If the 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.
NOTE: Heavy pressure will decrease the grinder’s 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 grinder to snag on the metal
edge.
 Lift the angle grinder away from the workpiece before
turning the angle grinder off.