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11
STARTING AND
STOPPING GRINDER
The “ON-OFF” switch (A) Fig. 18 is located on the front
of the grinder. To turn the grinder “ON” move the switch
to the right, and to turn the grinder “OFF” move the
switch to the left.
GRINDING WHEELS
WARNING: THE USE OF ACCESSORIES AND
ATTACHMENTS NOT RECOMMENDED BY DELTA
MAY RESULT IN RISK OF INJURIES. Grinding wheels
used with Model 23-730 grinders should be rated for
3600 RPM or higher and be 8" in diameter with a 5/8" or
1" arbor hole. Grinding wheels used with Model 23-725
grinders should be rated for 1800 RPM or higher and be
8" in diameter with a 5/8" or 1" arbor hole. Grinding
wheels used with Model 23-735 grinder should be rated
for 1800 RPM or higher and be 10" in diameter with a
3/4" or 1-1/4" arbor hole.
The arbor bushing should be saved, for future use, if the
replacement wheel does not use the bushing.
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.
DRESSING A GRINDING WHEEL
When dressing a grinding wheel, use a suitable silicone
carbide stick type dresser or the wheel dresser wrench
provided with the grinder, as shown in Fig. 19. Bring the
dresser forward on the tool rest until it just touches the
high point on the face of the wheel and dress the wheel
by moving the dresser back and forth. Repeat this
operation until the face of the grinding wheel is clean
and the corners of the wheels are square.
Fig. 18
A
Fig. 19