AMMCO 6000 Heavy Duty Drum/Disk Lathe - Manual (Page 16)

Note: FEED AND SPEED SETTINGS—The following spindle
speed and feed speed recommendations are intended to serve
as a starting point for a machine operator not familiar with the
lathe.
Drums Spindle Speed Feed Speed
Up To 12" Dia. Medium Fast Medium Slow
Over 12" Dia. Medium Medium Slow
Note: See CONTROL PANEL FUNCTIONS.
Although these settings are relatively slow, they should give
the manufacturer’s recommended finish and good tool life. The
settings may be increased considerably, however, tool life
decreases as spindle and feed speeds increase.
12. If a finish cut is to be made simultaneously with the
rough cut or a rough cut and grind are to be done at the same
time, repeat steps 5, 6, and 7 on the left side of the lathe.
Note: Both the lathe and the grinder must be running when
the grinder is moved into contact with the drum.
Start the second (finish) cut at least one inch behind the rough
cut. Find the zero setting for the left side by carefully advancing
the tool bit or grinder (both the lathe and the grinder must be
running) by hand until it makes light contact with the drum. Set
the micrometer dial to zero. Advance the tool bit to the desired
depth for the finish cut and tighten the saddle lock lever. Engage
the saddle feed gearbox and set the feed speed.
Disengage the feed gearbox and shut the lathe off when the
cut is completed.
Note: Determine the depth-of-cut by these general guidelines:
• Finishing cuts should not be shallower than .002 inches (.05
mm).
• Usually no more than two cuts are required to recondition a
drum.
Brake Lathes
10 • AMMCO 6000, 6002 Brake Lathes