Spindle Speeds; Changing Speeds And Adjusting Belt Tension; Drilling Holes To Depth - Delta ShopMaster DP115 Instruction Manual

SPINDLE SPEEDS

Five spindle speeds of 620, 1100, 1720, 2340 and 3100
RPM are available with your drill press. Fig. 21, illustrates
which step of the motor and spindle pulleys the belt
must be placed to obtain the five speeds available.
CHANGING SPEEDS AND
ADJUSTING BELT TENSION
NOTE: A BELT POSITIONING SPEED CHART (E) FIG.
22, IS LOCATED ON THE INSIDE TOP COVER OF
THE DRILL PRESS.
1. DISCONNECT MACHINE FROM POWER SOURCE.
2. Lift up the belt and pulley guard (A) Fig. 22.
3. Release belt tension by loosening tension lock knob
(B) Fig. 22, and pivoting the motor (D) toward the front of
the drill press.
4. While holding the motor toward the front of the drill
press, position the belt (C) on the desired steps of the
motor and spindle pulleys, as shown in Fig. 22.
5. After the belt is positioned on the desired steps of
the motor and spindle pulleys, pivot motor (D) Fig. 22,
away from the drill press head until the belt is properly
tensioned and tighten tension lock knob (B). The belt
should be just tight enough to prevent slipping.
Excessive tension will reduce the life of the belt, pulleys
and bearings. Correct tension is obtained when the belt
(C) can be flexed about 1" out of line midway between
the pulleys using light finger pressure.
DRILLING HOLES
TO DEPTH
Where a number of holes are to be drilled to exactly the
same depth, the stop nuts on the threaded stop rod are
used as follows:
1. DISCONNECT MACHINE FROM POWER SOURCE.
2. Insert bit into chuck.
3. Lower the spindle until the pointer (A) Fig. 23, lines
up with the mark on the scale (B) you wish the depth of
the holes to be drilled. Then thread the lower stop nut (C)
down to contact the depth stop (D) on the side of the
head. Return the spindle to the up position.
4. Place the material to be drilled on the drill press
table. Raise the drill press table until the material to be
drilled just touches the drill bit.
5. Tighten the upper stop nut (E) Fig. 23 against the
lower stop nut (C).
6. Drill a test hole to check the adjustment and readjust
if necessary. All holes will be drilled to the depth indicated
by the setting of the lower stop nut (C) Fig. 23, as it
contacts the depth stop (D) when the spindle is lowered.
SPINDLE
E
A
11
MOTOR
3100
2340
1720
1100
620
Fig. 21
C
B
Fig. 22
A
B
E
C
D
Fig. 23
D