Brake rotor thickness specs

A technician must remove the wheel and use a micrometer on the rotor to measure its thickness accurately. In-stock items and ship-to-home only. Many brake experts recommend replacing both rotors at the same time (even if one is still “good”) to maintain even braking side-to-side. A significant difference in rotor thickness may cause the brakes to pull toward one side.

Rotor thickness is measured as overall thickness , about in from the outer edge. 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. COM I made a quick video on how to measure a brake rotor and I tell you how to go about finding the specifications for a particular brake rotor. WALL THICKNESS and Where to Find The. For driving safety reasons, the brake pad wear indicator will emit a squealing sound when the brake pad thickness is close to 2. This squealing sound indicates that the pad wear plate and the rotor disc are in contact.

A brake rotor has a specified minimum thickness. Normal braking action can cause wearing of the rotor surfaces. MOTOR Light Duty Specifications and Quick Reference guides. Where I live we have no safety inspections, but if there are where you live there MAY be a state regulation that prohibits issuing a safety certificate if a car is found to have undersized rotors. Need min specs for front and rear rotors.

Answered by a verified Chevy Mechanic. I put new brake pads on my. Today my wife took her car in for a state inspection. The dealer told her that all rotors and all brake pads need to be replace for the sum of $880! Smelling a rat, I pulled all wheels tonight and disassembled the brake pads.

The specified minimum thickness is the absolute minimum below which the disc may not be used anymore. Getting ready to change my brake pads and would like to know the threshold thickness for replacing the front rotors. Tesla rear rotor is set up for a drum.

When checking brake rotor thickness , measure rotor in about different spots, mark each spot to keep track of where you have measured. If rotor does not meet minimum thickness then replace, remember to always replace brake rotors in pairs. If your brake rotor passes thickness but you have a pulsation while using brakes, replace brake rotors. A precision-cut finish of the outer diameter of the rotor prevents improper balance issues that may result in vehicle control loss. Tight tolerance specifications reduce thickness variation and lateral run-out, ensure a balanced rotor , and reduce pedal pulsation, brake noise while extending pad life.

BRAKE ROTOR THICKNESS VARIATION MEASUREMENT 1. Andrew Markel visits minimum wear specification on brake rotors and how the specification is related to brake pad wear and how far the caliper has to push the pads. 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. When doing brake repair, rotor thickness is an important aspect to check.

If any portion of the rotor is thinner than the minimum thickness it must be discarded. If after machining the brake disc measures on or below the minimum thickness specified by the vehicle manufacturer, the brake disc shall be replaced. All brake rotors have a discard dimension cast into them. Replace any rotor that does not meet this specification.

The minimum thickness should be cast right into the area around the rotor hat. Thickness brake disc, new mm 1. Brake disc thickness , new front - mm rear - mm. Determining a rotor ’s or drum’s serviceability based on available specifications.

Cause: Many manufacturers do not supply both machine to and discard thickness. Solution: No Machine to Specification Listed.

Many vehicles no longer provide a machine to specification. This does not mean the rotor is not serviceable. Front - Minimum thickness after machining - 23mm Front - Minimum thickness after on-vehicle brake lathe machining - 23.

Rear - Minimum thickness after machining - 8mm Rear - Minimum thickness after on-vehicle brake lathe machining - 8. Measure the thickness in different positions of the rotor. A: Brake -pedal pulsation and other conditions such as steering-wheel shaking while braking are caused by thickness variation in the brake rotor When a thicker spot of the rotor rotates through the caliper, it pushes back against brake flui which can be felt at the brake pedal. It should be very visible. Find brake parts including brake drum hardware at Advance Auto Parts.

If the rotor is not more than 1-1. The best parts at discount prices. Buy online, pick up in-store in minutes. OEM brake rotor specifications ? I need to know the new OEM specified rotor thickness for.

What is the minimum allowable thickness for fullsize OEM front brake rotors? While the rotor is off, measure the runout in the wheel bearing hub unit’s flange. The hub unit is one of the first items to fail on the vehicle.

In most cases, the first signs of a failure will be an open, erratic or weak wheel speed sensor trouble code. It's important to measure your brake rotor wear every 10miles or at the very least every time you change your brake pads. Brake Rotors Specs Front brake rotor minimum thickness.

You want to use a micro measuring caliper to determine your brake rotor thickness.