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Model T31739 (Mfd. Since 11/19)
The Model T31739 has a variable-speed spin-
dle that operates between 400-2700 RPM. This
speed range is achieved using an adjustable pul-
ley system that is controlled by moving the spindle
speed lever shown in
Figure 22.
Changing Spindle
Speed
The digital readout on the front of the headstock
displays the spindle RPM. Pull the spindle speed
lever forward to increase spindle speed. Push the
lever backward to decrease spindle speed.
Note: Spindle speed can only be adjusted when
the spindle is running.
Figure 22. Spindle speed lever and DRO.
Spindle Speed
Lever
Speed
Digital Readout
Usually, once the chuck and arbor have been
properly mounted together, they are considered
semi-permanent connections. If you would like to
install a different chuck, we recommend getting a
new arbor for that chuck.
Installing/Removing
Chuck Arbor
1. DISCONNECT MACHINE FROM POWER!
2. Rotate chuck on arbor until chuck jaws retract
into drill chuck body.
3. Slide arbor into spindle socket while slowly
rotating chuck to line up tang on arbor with
slot in socket (see
Figure 23).
4. Strike face of chuck from below with rubber-
faced mallet to seat arbor in spindle.
5. Check seat by gently pulling down on chuck.
Figure 23. Spindle, arbor, and chuck.
Spindle Socket
Arbor Tang
Scan this code to see a video of the above
process!
Installing Drill Chuck and Arbor
Summary of Contents for T31739
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