Runout and DTV: How to Decrease Comebacks With Two Simple Tools
Replacing rotors on every brake job is not a cost-effective or efficient way to perform brake service. You may save 10 to 15 minutes by not having to use a dial indicator and a micrometer, but your risk of a comeback can dramatically increase.
Brake Rotor Finishing: Non-Directional For Maximum Smoothness
Back in the day, a non-directional rotor finish was the method used to solve a common problem that occurred on bench brake lathes. If the cross-feed speed on some lathes was too fast, the rotor became the record and the pads became the needle that followed the grooves in the record. This would cause a clicking noise as the pads moved in the caliper. Today, a non-directional or post-lathe surfacing process still serves the same purpose, but it also helps in the bedding of some friction formulations.
