Changing the Pulley Speeds
The Drill Press has five (5) different pulley speeds at the following RPMs: 620, 1100, 1720, 2340 and 3100. A
full chart of belt arrangements for each drill speed is located on the inside of the Pulley Cover.
To change the speed of the Drill, you will need to move the belt to the appropriate pulleys. Hold the Knob (part
#17A) and lift up on the Belt Guard (part #25A). Adjust the belt tension by manually moving the belt into the
appropriate grooves on the pulleys which correspond to the speed desired. Consult the chart inside the pulley
cover and position the belts on the pulleys according to the desired drill speed - see Figure 8.
Step 1) Turn the Thumb-Nut (part #28C) to loosen it and bring the Motor Pulley (#23) closer to the Spindle
Pulley (part #3A). This will allow the belt to be moved easily.
Cutting Speeds
The factors which determine the best speed to use in the drill press operation are:
1)
Type of material to be drilled
2)
Size of hole
3)
Type of drill bit
4)
Quality of the hole or cut desired.
Generally, the SMALLER THE DRILL BIT the GREATER THE REQUIRED RPM. In soft material, the speed
should be higher than for hard metals. As a general guide, the drill speed for a given drill bit size is listed in the
chart on the next page.
Figure 7 - Setting Drilling Depth
Depth Lock Screw
Motor Pulley
Spindle Pulley
Figure 8 - Changing the Pulley Speed
#42289
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