Step 4: Make The Cut - Pro-Cut X9 Technical Manual

MACHINING ROTORS

Step 4: MAKE THE CUT

1.
2.
3.
4.
STEP 4.
Technician sets cut depth.
5.
WARNING
It is extremely important
not to touch the hat of the
rotor with the outer tool
holder. This will damage
or break the tool holder
plate. This type of dam-
age is NOT COVERED BY
THE WARRANTY.
PG / 800.543.6618
24
(4 Minutes)
With the motor still running, loosen the forward lock lever on the cutting head to allow cutting depth
adjustment.
Turn cut-depth knobs counter-clockwise until the tips can clear both sides of the rotor. Crank the cutting
head in to 1/2" from the outer edge of the braking surface of the rotor.
Start with the inside (behind the rotor) tool arm. Turn the depth knob clockwise (tighten) until the tool tip
just barely makes contact (scratches) with the rotor surface. You can listen for the contact. Next move
the outside tool arm in until it also makes contact.
If there is a large ridge on the outer edge of the rotor, you may remove that as well by depressing the feed
clutch and allowing the lathe to cut off the ridge. Now you may zero set the knobs, back off the tool arms,
and wind the cutting head back in to 1/8th of an inch from the inside starting point of the cut. Be careful
not to crank the cutting arms into the "hat" of the rotor. Damage caused by advancing the cutting arm
into the hat of the rotor is not covered by warranty.
When you are at the inside edge of the pad contact surface, you may adjust for depth by turning the depth
knobs clockwise until you reach zero on each knob, which should be the original scratch point from the
test scratch on the outer edge. If the cutting tips are not touching the rotor at the zero set mark, then you
must turn the knob(s) clockwise until they do - this is your start point to add the depth of cut. Each line
of the knob represents cutting tip movement of 0.0025" / 0.064mm. Cut at least 0.005" / 0.13mm (or
two lines) on each side with each pass. The maximum depth is 0.020" / 0.51mm per side, per pass. The
exceptions to this rule would be extremely large and thick rotors such as on a Medium Duty truck like the
Ford F550 or larger, or very thin solid rotors such as on the rear of a Cadillac DeVille. In these applica-
tions, the depth rule is reversed and the minimum cut can be reduced to 0.0025" / 0.13mm per side per
pass, and the maximum cut depth should be limited to 0.005" per side per pass. Other specialty rotors,
such as cross-drilled or slotted, may also require a reduced cut depth. Note: See our web site for tech-tips
on cutting larger and specialty rotors.