Delta 23-725, 23-730, 23-735 instruction manual Starting and Stopping Grinder

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.

A

Fig. 18

Fig. 19

11