Spindle Speeds; Changing Speeds And Adjusting Belt Tension - Delta 17-959L Instruction Manual

SPINDLE SPEEDS

Sixteen spindle speeds are available on the drill press. Fig. 37 illustrates the belt positions and the corresponding
speeds.

CHANGING SPEEDS AND ADJUSTING BELT TENSION

NOTE: Sixteen spindle speeds are available on the drill press. A belt-positioning speed chart is located on the inside top
cover of the drill press.
DISCONNECT THE MACHINE FROM THE POWER SOURCE!
1. Open the top cover.
2. Loosen the lock-knob (A) Fig. 38 and the tension knob (located on the other side of the head casting). Move the tension
lever (B) forward.
3. Position both belts (C) Fig. 38 on the spindle pulley, center pulley, and motor pulleys according to the chart.
4. Move the tension lever (B) Fig. 39 to the rear to tension the belts.
NOTE: The belt should be just tight enough to prevent slipping. Excessive tension will reduce the life of the belt, pulleys, and
bearings. Tension is correct when you can flex the belt about 1" out of line, midway between the pulleys, using light finger
pressure.
5. Tighten the two tension lock knobs (A), one of which is shown.
C
B
A
Fig. 38
A
B
16
Fig. 37
Fig. 39