Delta GR150 User Manual

4 - 

English

1.  DO NOT OPERATE THIS MACHINE until it is 

completely assembled and installed according to 
the instructions. A machine incorrectly assembled 
can cause serious injury.

2. OBTAIN 

from your supervisor, instructor or 

another qualified person if you are not thoroughly 
familiar with the operation of this machine. 
Knowledge is safety.

3.  FOLLOW ALL WIRING CODES and recommended 

electrical connections to prevent shock or 
electrocution.

4.  ALWAYS USE THE PROVIDED BLOTTER AND 

WHEEL FLANGES to mount the grinding wheels 
on the grinder shaft to prevent wheel damage or 
accidental separation. Separation can result in 
fragments flying off the wheel at high speeds.

5.  USE ONLY WHEELS suitable for the speed of the 

machine. Unsuitable grinding wheels can come 
apart, throwing fragments out at high speeds.

6.  USE ONLY WHEELS that have a bore exactly 

equal to the arbors of the machine. Never attempt 
to machine an undersized wheel to fit an arbor. 
Unsuitable grinding wheels can come apart, 
throwing fragments out at high speeds.

7.  DO NOT OVERTIGHTEN WHEEL NUT.
8.  DO NOT USE A WHEEL THAT VIBRATES. Dress 

the grinding wheel, replace it or replace the bearings 
of the shaft. Unsuitable grinding wheels can come 
apart, throwing fragments at high speeds.

9. INSPECT 

before starting the machine for 

cracks or fragments. REPLACE DAMAGED WHEELS 
immediately. Parts of the wheel can be thrown at 
high  speeds causing serious injury.

10. ADJUST EYE SHIELDS close to the grinding 

wheel, and re-adjust as the wheel wears down. 
Flying sparks are dangerous and can cause fires or 
explosions.

11.  ALWAYS MAKE SURE the eye shields are in place, 

properly adjusted, and secured.

12. ADJUST TOOL RESTS close to the grinding 

wheel (1/8" separation or less). Tighten the tool 
rest securely to prevent shifting positions, and re-
adjust as the wheel wears down. The workpiece 
can be drawn into the wheel, causing damage to 
the workpiece and/or  serious injury.

13. STAND TO ONE SIDE before turning the machine 

"ON". Loose fragments or wheel parts could fly 
from the wheel at high speeds.

14. NEVER GRIND ON A COLD WHEEL. Run the 

grinder for one full minute before applying the 
workpiece. A cold wheel has a tendency to chip. 
Those fragments could fly from the wheel at high 
speeds.

15. NEVER START THE MACHINE with the workpiece 

against the grinding wheel. The workpiece can 
be drawn into the wheel, causing damage to the 
machine and/or serious injury.

16. CLEAN THE MACHINE thoroughly  when processing 

different types of workpieces (wood, steel or 
aluminum). Combining wood and metal dust can 
create an explosion or fire hazard. DO NOT GRIND 
OR POLISH MAGNESIUM. Fire will result.

17. NEVER GRIND NEAR FLAMMABLE GAS OR 

LIQUIDS. Sparks can create a fire or an explosion.

18. AVOID AWKWARD OPERATIONS AND HAND 

POSITIONS.  A sudden slip could cause a hand to 
move into the grinding wheel.

19. KEEP ARMS, HANDS, AND FINGERS away from the 

wheel. The abrasive surfaces can cause serious injury.

20. HOLD THE WORKPIECE FIRMLY against the tool 

rest. Loss of control of the workpiece can cause 
serious injury.

21.  DRESS THE WHEEL on the face only. Dressing the 

side of the wheel could cause it to become too thin 
for safe use.

22. GRIND A WORKPIECE using the face of the grinding 

wheel only. Loss of control of the workpiece can 
cause serious injury.

23. NEVER APPLY COOLANT directly to the grinding 

wheel. Coolant can weaken the bonding strength 
of the grinding wheel and cause it to fail. Dip the 
workpiece in water to cool it.

24.  DO NOT TOUCH the ground portion of a workpiece 

until it has cooled sufficiently. Grinding creates heat.

25.  PROPERLY SUPPORT LONG OR WIDE WORK-

PIECES. Loss of control of the workpiece can cause 
serious injury.

26. NEVER PERFORM LAYOUT, ASSEMBLY or set-up 

work on the table/work area when the machine is 
running. A sudden slip could cause a hand to move 
into the wheel. Severe injury can result.

27.  TURN THE MACHINE "OFF", disconnect the 

machine from the power source, and clean the 
table/work area before leaving the machine. 

28.  ADDITIONAL INFORMATION  regarding the safe 

and proper operation of power tools (i.e. a safety 
video) is available from the Power Tool Institute, 
1300 Sumner Avenue, Cleveland, OH 44115-2851 
(www.powertoolinstitute.com). Information is 
also available from the National Safety Council, 
1121 Spring Lake Drive, Itasca, IL 60143-3201. 
Please refer to the American National Standards 
Institute ANSI 01.1 Safety Requirements for 
Woodworking Machines and the U.S. Department of 
Labor OSHA 1910.213 Regulations.