AMMCO 4000E Drum and Disc Brake lathe - Manual (Page 9)

Cross Feed Handwheel & Feed Lever
Clockwise rotation of the cross feed handwheel
moves the cutting tool in towards the lathe.
Counterclockwise rotation of the cross feed hand-
wheel moves the cutting tool away from the lathe.
Engaging the feed lever completes the feed cycle.
Figure 1 – Rotation of handwheels & Feed Lever
Boring Bar
A boring bar is used to recondition a brake drum.
Clean the slide and bottom of the boring bar clamp.
Install the boring bar and boring bar clamp onto slide,
over the stud bolt and secure with self-aligning nut.
Handtighten the nut only at this point. Make sure the
tool bit is clean and sharp. Replace as necessary to
ensure smooth reconditioning.
Figure 2 - Boring Bar
Twin Cutter
A twin cutter tool is used on to recondition both sur-
faces of a brake rotor at the same time. The twin cutter
replaces the boring bar on top of the cross feed after
removing the upper and lower tool bar clamps.
1. Mount the twin cutter on the cross feed with the
stud bolt extending through the cast slot. The slot helps
center the twin cutter to the rotor.
2. Secure the twin cutter to the cross feed with self-
aligning nut and washer assembly. Tighten the nut
firmly.
Figure 3 – Install the Twin Cutte r
AMMCO Drum & Disc Brake Lathes • 7
Cross Feed
Handwheel
Feed Lever
Spindle rotates when
motor is turned on.
Upper and lower
boring bar clamps
Cross slide self-aligning nut/washer
Twin cutter
Cross slide self-aligning nut/washer
Boring Bar Clamp