MAHLE RTI BRC450 - Manual (Page 16)

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K. Finish cut. If another at least another 0.008" (0.20 mm) could be removed without the rotor being
thinner than the discard thickness, then up to 0.004" (0.01 mm) can be removed (0.004" = 0.10 mm
each side) leaving some material for future wear of the rotor. If so, move the tool slide inward manually
and set each tool for a 0.002" (0.05 mm) “finish cut”.
L. Cutting the other side. On one side of the vehicle the BRC450 will need to be positioned up-side-
down. Otherwise, setup and operation are the same.
VI. Alternate Compensation
There is an alternate method of performing the compensation. This alternate method is somewhat
easier but not as precise, so the run out achieved will not be as low. It may be appropriate however if
run out of as much as 0.003" (0.075 mm) is deemed to be acceptable. The alternate method is to
attach the dial indicator clamp to the knuckle as in the standard technique, but to place the dial
indicator stylus on the machined surface of the Centering Plate (See arrows in Figure 4). Adjust the
cranks as in the standard technique so that the maximum total movement of the dial indicator needle
is less than 0.001" (0.025 mm). Since the position of the stylus from the hub axis in this case is one-
half or less of the distance from the hub axis to the rotor surface, the actual run out of the rotor will be
twice to three times the reading of the dial indicator (Unlike the standard technique where the actual
run out of the rotor is one half of the dial indicator reading). This alternative technique can also be used
as a rough set up technique before the lathe is installed, with the standard technique used for checking
and/or setting the fine and final adjustment.
VII. Changing Cutting Tips
RTI’s Positive Rake Cutting Tips have three corners. There is a top and bottom. The tips will only work
when the top is up when viewing the tip holder from the side, with the tip on the top of the tip holder.
When viewed from the side, the top is evident based on the fact that the taper should from the top
edge to the bottom with the top protruding out the furthest. The cutting tip edge on each corner is worn
and should be changed when the surface finish no longer meets requirements or when the corner is
chipped or damaged. When one corner is worn, simply loosen the tip, turn it 120 degrees and re-install
(See Figure 3). Note that the tip holders are installed on the BRC450 so that they face down, in other
words the top of the tip and the tip holder are facing down when installed in the tool holder.
VIII. General Maintenance
There is no suggested maintenance to the BRC450 other than: 1) Keep the entire lathe and especially
the slideways clean, removing cutting chips with the cleaning a brush after each use; and 2) Clean
and lube the slideways as noted in the Initial Set Up Section at least once per week.
IX. Technical Support
For the life of the BRC450, you are entitled to free over the phone technical support. Please call if you
have any questions. Our number is 800-486-2321 or 717-840-0678 (Ext. 259). If we are not
immediately available, we will call you back the same day. (8 AM to 5 PM ET) We look forward to
speaking to you. We are happy to hear from our customers. Thanks for buying our product!