Ryobi G-237 Owner's Operating Manual

SPECIFICATIONS
G-237 G-239
Grinding wheel 230 mm (9") X 6mm 230 mm (9") X 6mm
Input 2,200 W 2,500 W
Spindle thread M14 X 2.0 M14 X 2.0
No load speed 6,600 min -1 6,600 min -1
Overall length 482.5 mm (19") 482.5 mm (19")
Net weight 4.9 kg (10.8 lbs.) 5.1 kg (11.2 lbs.)
Do not use wheels having a Maximum permissible circumferential speed
below 4,850 m/min.
DESCRIPTION
1. Trigger 8. Aux. handle
2. Spindle lock 9. Wrench
3. Grinding Wheel 10. Hex. socket head bolt
4. Wheel guard 11. Projection
5. Disc flange 12. Groove
6. Clamp nut 13. Safety lock
7. Spindle shaft 14. Hex. key wrench
STANDARD ACCESSORIES
Aux. handle, Wrench, Hex. key wrench
APPLICATIONS
(Use only for the purposes listed below.)
1. Grinding
TRIGGER (Fig. 1)
This tool is started and stopped by squeezing and releasing the
trigger (1). To prevent the tool from being started accidentally, the
trigger can only be operated if the safety lock (13) is pushed for-
ward first. It is not necessary to maintain pressure on the safety
lock once the trigger has been moved from its releasing position.
For continuous operation, push forward the safety lock while the
trigger is being squeezed. Squeeze again to release the lock.
ATTACHING THE WHEEL GUARD (Fig. 2)
1. Insert the projection (11) on the inside of the wheel guard
clamp into the vertical groove (12) of gear case cover.
2. Rotate the wheel guard to the position as shown in Fig. 2.
3. Tighten the hex.socket head bolt (10) and the washer of
wheel guard clamp with the hex. key wrench (14).
ATTACHING THE GRINDING WHEEL (Fig. 3)
1. Attach the disc flange (5), the grinding wheel (3) and the
clamp nut (6) to the spindle shaft (7).
Be sure the disc flange is properly seated on the spindle
shaft.
2. While pressing the spindle lock (2) on the gear case, rotate
the wheel until it is locked in place.
3. Tighten the clamp nut clockwise with the wrench (9).
CAUTION!
Do not tighten excessively since this can cause cracks in
the grinding wheel.
CAUTION!
When using grinding wheels which are less than 3.5 mm
thick, the clamp nut should be set reversely as shown in
fig. 4.
WARNING!
Check carefully whether or not there are cracks in the wheel.
Replace a cracked wheel immediately.
AUX. HANDLE
The aux. handle (8) can be attached to either side of, or the up-
per part of, the gear case.
OPERATING
KEEP THE WHEEL GUARD IN PLACE.
NEVER COVER AIR VENTS SINCE THEY MUST ALWAYS BE
KEPT OPEN FOR PROPER MOTOR COOLING.
GRINDING (Fig. 5)
The key to efficient operating is controlling the pressure and
surface contact between the grinding wheel and workpiece.
Flat surfaces are ground at an acute angle, (usually 10 to 20
degrees) to the workpiece. Allow the grinding wheel to reach full
speed before starting to grind. Too great an angle causes con-
centration of pressure on a small area which may gouge or burn
the work surface.
MAINTENANCE
After use, check the tool to make sure that it is in top condition.
It is recommended that you take this tool to a Ryobi Authorized
Service Center for a thorough cleaning and lubrication at least
once per year.
DO NOT MAKE ANY ADJUSTMENTS WHILE THE MOTOR IS
IN MOTION.
ALWAYS DISCONNECT THE POWER CORD FROM THE
RECEPTACLE BEFORE CHANGING REMOVABLE OR EX-
PENDABLE PARTS (BLADE, BIT, SANDING PAPER ETC.),
LUBRICATING OR WORKING ON THE UNIT.
WARNING!
To ensure safety and reliability, all repairs should be per-
formed by an AUTHORIZED SERVICE CENTER or other
QUALIFIED SERVICE ORGANIZATION.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
" WARNING
Always wear dust mask, ear protection and eye
"
protection
" WARNING To reduce the risk of injury, user must
read instruction manual "
" Class II construction tool in which protection against
electric shock does not rely on basic insulation only, but
in which additional safety precaution, such as double
insulation or reinforced insulation, are provided "
G-237, G-239
6987393-00 STD
02-17