Instruction manual

12
DRESSING A GRINDING WHEEL
When dressing a grinding wheel use a suitable silicon
carbide stick type dresser, as shown in Fig. 15. Bring the
dresser forward on the tool rest until it just touches the
high point of the face of the wheel and dress the wheel
by moving the dresser back and forth. Repeat this
operation until the face of the wheel is clean and the
corners of the wheel are square. ALWAYS maintain a
distance of 1/8" or less between the grinding wheel and
the tool rest. Adjust the tool rests and spark guards as
the grinding wheels decrease in size with use.
GRINDING WHEELS
WARNING: THE USE OF ACCESSORIES AND ATTACHMENTS NOT RECOMMENDED BY DELTA MAY RESULT IN
RISK OF INJURIES.
Grinding wheels used with this grinder should be rated for 3600 RPM or higher and be 6" in diameter with a 1/2" arbor
hole.
Two aluminum oxide grinding wheels are supplied with your grinder; one 36 grit and one 60 grit. For best grinding
results, and to maintain good balance, always keep the wheels properly dressed. Do not force the work against a cold
wheel. The grinding wheel should always be run at idle speed for one full minute before applying work. It is
recommended that only balanced wheels be used with your grinder. The use of balanced wheels adds years to the life
of the bearings on the grinder and by eliminating the most common source of vibration, more accurate work is
accomplished.
CHANGING GRINDING WHEELS
DISCONNECT MACHINE FROM POWER SOURCE.
1. When changing wheels, remove the screws attaching the side covers to the grinder and remove the side covers.
2. To prevent shaft rotation, place a wedge between the grinding wheel and the tool rest. NOTE: Facing the front of
the grinder: To replace the wheel on the left side of the grinder, turn the arbor nut clockwise to loosen; counter-
clockwise to tighten the arbor nut.
3. To replace the grinding wheel on the right, turn the arbor nut, counterclockwise to loosen; clockwise to tighten the
arbor nut.
4. The arbor bushing should be saved, for future use, if the replacement wheel does not require the bushing.
Do not overtighten wheel nuts when installing grinding wheels. Tighten wheel nut enough to drive the
wheel and prevent slippage.
Fig. 15
STICK
DRESSER
SILICON
CARBIDE
GRINDING
WHEEL
TOOL
REST
TROUBLESHOOTING
For assistance with your machine, visit our website at www.deltamachinery.com for a list of service centers or call
the DELTA Machinery help line at 1-800-223-7278 (In Canada call 1-800-463-3582).
MAINTENANCE