Brake rotor specs for machining

All performance brake rotors are sold in pairs and come Zinc coated in either Black or Silver to help prevent rusting. If the rotor thickness is acceptable, a dial indicator should be used to check for lateral run-out, dishing or taper, see Figure 2. Advanced on-vehicle brake lathes have the ability to measure rotor thickness electronically on a digital read out, and also measure the amount of cutting depth adjustments made digitally. The labor costs for turning the rotor, however, may exceed the price of a new rotor.

Another brake inspection or a state inspection would result in the rotor being under specifications after just being serviced. The industry has adopted the position of creating a revised machine to specification by adding. The minimum thickness cast into a rotor is the thickness at which the rotor should be discarded and is no longer suitable for service.

The two-key rotor dimensions to take into account are minimum refinish thickness and discard thickness. Minimum refinish thickness is the limit for resurfacing the rotor. Need min specs for front and rear rotors.

Answered by a verified Chevy Mechanic. Disc brake rotor minimum thickness (RMT) is the minimum safe working thickness of a rotor. When a disc rotor reaches RMT it must be replaced.

Choosing to ignore RMT is a safety risk. Continued use of disc rotors below RMT can lead to brake system failure. The vehicle manufacturer during initial vehicle design determines RMT. The cost for turning a rotor runs anywhere from $to $per rotor.

Purchasing new rotors typically will cost from $20-$per rotor and of course you will have a lot less problemsand a much longer rotor and brake pad life span. Find brake parts including brake drum hardware at Advance Auto Parts. The best parts at discount prices. Buy online, pick up in-store in minutes. The machine-to or minimum thickness specification provides enough rotor material for safe and reliable brake performance.

The discard thickness is the dimen-sion at which the rotor must be re-placed. If the rotor is within specifications, the rotor will spin true without wobbling outside of an imaginary plane drawn through the hub and parallel to it. The brake rotor attaches to the hub of the vehicle.

If it does wobble, the rotor may either need to be machined or replaced.

When machining a rotor , the thickness of one friction disc to the other should be taken into consideration. For example, if a rotor is gouged on one friction surface due to metal to metal contact with the brake pad but not the other, it could be possible to machine the gouge out and the rotor still be over machine to thickness. The only health hazard when machining rotors is if the tech drops a rotor on his foot or gets his shirttail caught between the rotor and brake lathe cutting bit! Thickness of brake rotor.

Rotors on most late model cars are thin and there is not much to cut. Semi-metallic brake pads usually contain a very high percentage of chopped steel fiber, so they typically cause more wear on the rotors than most ceramic or nonasbestos organic (NAO) brake pads. On vehicles where rotor wear is a problem, switching to a “softer” friction material (such as ceramic or NAO) may solve the problem — provided. The two primary goals of machining a rotor are to. Some one asked what does it intail to turn a rotor or drum so here it is.

Resurfacing a warped brake rotor with a Bridgeport and. These specifications are usually cast or stamped on the rotor , and can also be found in brake repair manuals. Excessive TV will cause the brake pads and caliper piston(s) to oscillate. New rotors are uniformly thick, and stop the vehicle smoothly.

But thick-ness variation can develop over time and eventually lead to brake pedal pulsa-tion. Machining a Cube on a Lathe. Brake Tech Information. Negative rake inserts work well.

Depending on the type of vehicles you service, the size of the shop, and how often you work there are several different styles to choose from including on car, bench, and heavy duty brake lathes. A rotor must be replaced if its worn down to minimum specifications or the discard thickness, or cannot be resurfaced without exceeding the minimum machine to specification. Combine the best brake service equipment with sales and marketing support for a stand-alone profit center for your shop. Specs for springs , axles.

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The inner brake pad (from its normal position of having a running clearance between it and the rotor ) moves into contact with the brake rotor. Further movement of the bridge forces the caliper — sliding on two stationary guide pins — away from the rotor. That, in turn, pulls the outer brake pad into the rotor.

Each Bendix Fleet MetLok Rotor is engineered to OEM-driven machining specs to ensure smooth pad-to- rotor contact and improved stopping power in all conditions. This means that the rotor is machined to match the hub. It has often been said that you should never machine new rotors, but what if the runout exceeds the manufacturer’s specifications when the new rotor is installed on the vehicle?

This situation makes it permissible to machine a new rotor with an on-the-car brake lathe. Manufactured for your specific vehicle, the part meets strict Ford Motor Company standards and incorporates all OE innovations and upgrades. When it comes to brake rotors, they are an important component of the brake system. Either way, this contact with the rotor is what causes a thickness variation. As the portion of the rotor with the thickness variation passes past the brake pads, the caliper piston has to extend or compress.

This causes the pressure of the brake fluid to rise or fall during braking. This change of pressure is what leads to pedal pulsation. If rotor thickness is within specification, use an approved on-car brake lathe and machine the brake rotor. To measure the brake rotor thickness and parallelism proceed as follows: Use a micrometer and measure the brake rotor thickness 0. A brake repair shop without a dial indicator is like an engine rebuild shop without a torque wrench,” said Dann Ingebritson, technical instructor, Affinia Under Vehicle Group.

I feel the Pro-Lite brake rotor is great value,by design it adresses the largest rotor problem besides actual wear (which is un avoidable) Warpage is the other main issue. The floatable disc takes care of this as long as all other componets are within service specs. If the brake rotor has been REFINISHED or REPLACED with a new rotor , proceed to step 14.

The rotor is within specifications and is being REUSED.