Jet Tools JDP-20MF Chuck and Arbor Removal, Depth Stop Adjustment, Changing Spindle Speeds

Chuck and Arbor Removal

1.Unplug machine from the power source.

2.Raise the table until it is about seven inches below the chuck.

3.Place a piece of scrap wood on the table, and lower quill (A, Fig. 9) using the downfeed handle.

4.Rotate spindle to align the keyhole in the spindle with the keyhole in the quill.

5.Insert the drift key (B, Fig. 9) into the aligned slots and tap lightly. The chuck and arbor assembly should fall from the spindle.

Adjustment

Depth Stop Adjustment

To drill multiple holes at the same preset depth, use the depth stop:

1.Use a pencil to mark the depth the bit will drill into the workpiece.

2.With the drill bit in the chuck, lower downfeed handle to advance bit to your mark (A, Fig. 10).

3.With your other hand, advance the lock nuts (B, Fig. 10) on the depth stop rod until they are snug to the seat (C, Fig. 10).

4.The drill bit will now advance to this point.

5.To release, advance the nuts counter- clockwise to the top of the depth stop.

Changing Spindle Speeds

A spindle speed and pulley/belt arrangement chart is found on the inside of the pulley cover (D, Fig. 11), also shown in Figure 12. Refer to this chart whenever changing speeds.

8. To change spindle speeds:

1.Unplug the machine from the power source.

2.Loosen two bar knobs (E, Fig. 11) found on each side of the head assembly.

3.Rotate the tension adjuster clockwise

(F, Fig. 11) to bring the motor base as close to the head as possible.

4.For desired speed, change the location of belts per pulley/belt arrangement chart.

5.Rotate the tension adjuster counterclockwise (F. Fig. 11) to tension the belts.

6.Tighten two bar knobs (E, Fig. 11). Belts are properly tensioned when finger and thumb pressure midway between the two pulleys causes approximately ½” deflection.

Figure 9

Figure 10

Figure 11

11