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Caution – AMMCO 4000E Drum and Disc Brake lathe User Manual

Page 8

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Basic Operation

To completely understand drum and rotor turning you

must have a knowledge of the lathe itself.

Spindle

The spindle is a motor driven shaft that turns the arbor

upon which the brake drum or rotor is mounted. By
turning the drum and holding a cutting tool against the
inner braking surface, metal can be removed.

Do not move or adjust the spindle speed
lever without the drive motor running.
Damage may occur to the unit.

Spindle Jog

By operating the spindle jog buttons, the spindle will

move to the left or right as desired to position the work-
piece. Note that the spindle jog is active only in the
drum mode of operation.

Spindle Feed Rate

Spindle feed rate refers to the amount of movement

the spindle travels per revolution. This feed rate is elec-
tronically controlled using +/- buttons on the control
console drum feed adjustments.

Spindle Speed and Adjustment

Spindle speed is measured in RPM (revolutions per

minute) and is adjustable using the 3-position speed
lever at the front of the machine.

Spindle speed adjustment is accomplished by moving

the 3-position speed adjustment lever up or down to
achieve 100, 150, or 200 RPM choices.

Important: Do not adjust the spindle speed unless

the lathe is running.

Cross Feed

The cross feed draws the tool bit across the face of a

brake rotor or flywheel when the cross feed drive is
engaged. The cross feed may also be operated manu-
ally using the cross feed handwheel.

Feed speed refers to the rate of movement that the

cutting tools move per revolution of the spindle. The
cross feed speed is variable as indicated on the control
console.

Note: The cross feed has a rough and finish setting.

Both are variable using the control console.

CAUTION

6 • AMMCO Drum & Disc Brake Lathes

Speed and Feed Reference Chart

Refer to the chart on the lathe for typical speed and feed rates. Use this guideline as a starting point and then

fine tune the settings according to your specific application.

Note: These are only suggested speed and feed ranges. Adjust settings as needed to find the optimum setting

for your application.

Workpiece

Diameter (inches)

6 to 9

8 to 15

15 & Up

Spindle RPM

200

150

100

Rough Feed

80

50

30

Finish Feed

16

14

12