10 • Snap-on
Brake Lathes
Feed speed refers to the thousandths of an inch the
cutting tools move per revolution of the spindle. The
cross feed speed is adjustable.
1.
Using the 3-position lever, select Fine (0.002"
[0.05 mm]) or Coarse (0.010" [0.25 mm]). The Neutral
position is the off position (no movement). The cross
feed may also be operated manually.
V-Belt Tension and Adjustment
A loose belt can cause slippage when taking heavy
cuts. A belt that is too tight can cause vibration and
possible sub-standard finishes on machined drums
and rotors. Check and adjust belt monthly.
There should be between
1
⁄
4
” to
1
⁄
2
” of play in the
belt.
1.
Position the v-belt speed adjusting lever to the
left (counterclockwise) to the fully engaged position.
2.
Loosen the adjustment nut.
Figure 5 – Engage lever and loosen nut
3.
Push in on the belt approximately 1⁄4” to 1⁄2”
(0.64 to 12.7 mm) and hold.
4.
Retighten the adjusting nut.
Figure 6 – Press the belt in and tighten adjusting nut
Basic Operation of Handwheels
Clockwise rotation of the spindle feed handwheel
retracts the spindle in towards the lathe.
Clockwise rotation of the cross feed handwheel
moves the cutting tool in towards the lathe.
Figure 7 – Clockwise rotation of handwheels
Counterclockwise rotation of the spindle feed hand-
wheel extends the spindle out away from the lathe.
Counterclockwise rotation of the cross fee hand-
wheel moves the cutting tool out away from the lathe.
Figure 8 – Counterclockwise rotation of handwheels
Spindle Feed
Handwheel
Cross Feed
Handwheel
Spindle rotates when
motor is turned on.
Spindle Feed
Handwheel
Cross Feed
Handwheel
V-belt
Adjustment Nut
Speed Adjusting Lever
Push in
1
⁄
4
”
to
1
⁄
2
”
