Off-Vehicle Procedure

RECOMMENDED PROCEDURES
The following are two recommended procedures which achieve adequate results using two different off-vehicle drum/disc brake lathes. (If any other lathe is used, follow that lathe's instructions and recommendations.)

NOTE: The following is a two-cut refinishing procedure.

AMMCO BRAKE LATHE

Spindle Speed
- Rough cut, 150 rpm.
- Finish cut, 150 rpm.

Depth of Cut (per side)
- Rough cut, 0.1524 - 0.6350 mm (0.006 - 0.025 in.).
- Finish cut, 0.1016 - 0.1524 mm (0.004 - 0.006 in.).

Cross Feed (per rev)
- Rough cut, 0.254 mm (0.010 in.).
- Finish cut, 0.0508 mm (0.002 in.).

Vibration Damper
- Rough cut - Yes.
- Finish cut - Yes.


NOTE: The following is a one-cut refinishing procedure.

ACCU-TURN BRAKE LATHE
- Locate the deepest score, and turn the rotor micrometer knob until the tool bit bottoms out at the deepest point of the score.
- Zero the scale and back out the tool bit (repeat for opposite side of rotor).
- Advance the cutter handwheel until the bits have cleared the inner edge of the rotor face.
- Adjust the micrometer knobs for about 0.127 mm (0.005 inch) more than the first reading. This will ensure resurfacing the rotor in one cut.

Spindle Speed - 105 rpm.

Depth of Cut - As necessary.

Cross Feed (per rev) - 0.0762 mm (0.003 in.).

Tool Bit Nose Radius - 1/64.

Vibration Damper - Yes.