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Operation – Ryobi AG452 User Manual

Page 11

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11

OPERATION

WARNING

:

Always install grinding wheel and abrasive mop disc
with the depressed center against the disc flange as
shown below. Failure to do so will cause the grinding
wheel to crack when tightening the nut. This could result
in serious personal injury because of loose particles
breaking off and being thrown from the angle grinder.
Do not overtighten.

FLANGE

NUT

GRINDING

WHEEL

DISC

FLANGE

SPINDLE

SPINDLE

LOCK

FLAT(S)

WRENCH

TO

TIGHTEN

TO

LOOSEN

Fig. 4

FLANGE NUT

TURNED

CORRECTLY

NUT TURNED

INCORRECTLY

TO

TIGHTEN

TO

LOOSEN

WIRE

WHEEL BRUSH

Fig. 5

NUT TURNED

INCORRECTLY

DISC

FLANGE

FLANGE NUT

TURNED

CORRECTLY

TO

TIGHTEN

TO

LOOSEN

ABRASIVE

MOP DISC

DISC

FLANGE

Fig. 6

To install grinding wheel and wire wheel brush, thread the

nut on the spindle with the flat side of flange nut facing
up. Fit raised, small diameter portion of the nut into the
hole in the wheel and finger tighten. See figures 4 and 5.

To install abrasive mop disc, thread the flange nut on

the spindle with the flat side of nut facing down. Finger
tighten. See figure 6.

Depress and hold the spindle lock button and rotate the

wheel clockwise until the spindle locks in position.

Securely tighten the flange nut with the wrench provided.

Do not overtighten.

GRINDING, SANDING, BRUSHING

See Figure 7.

Always carefully select and use grinding wheels that are

recommended for the material to be ground.

Make sure the minimum operating speed of any acces-

sory 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.

The wire wheel brush is suitable for removing paint or

rust from metal surfaces.

The abrasive mop disc is suitable for sanding flat metal

or wood surfaces.

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 controlling the pressure

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

° to 15° and continuously moving at a steady,

consistent pace.