Receiving Helpdesk

how do you measure brake rotor thickness

by Isabell Schiller DVM Published 3 years ago Updated 2 years ago

To measure your rotor's minimum operational thickness, place a micrometer at the thinnest point on the rotor's surface where it meets the brake pads. If your rotor has worn past this thickness or needs to be cut, you need new rotors. Your rotor may exhibit signs of Disc Thickness Variation (DTV).

What thickness do brake rotors need to be replaced?

Measure the brake rotor thickness 0.40 inches (10mm) inside the outer circumference of the brake rotor every 45° ( 1 / 8 of a rotation). 6. Compare the smallest value measured to the minimum thickness specifications stamped on the brake rotor. If the rotor is below the minimum thickness, the rotor must be replaced.Mar 10, 2021

What is the minimum thickness for brake rotors?

Brake rotors are marked with a “minimum thickness” on the casting (usually 2 mm to 3 mm less than the new rotor thickness). Rotors should be replaced before they reach this minimum thickness and should not be “turned” (machine refinished) below this.

How do I know what size rotors I need?

HOW TO MEASURE A BRAKE DISCID = Inside Diameter: Measure from inside edge to inside edge.OD = Outside Diameter: Measure from outside edge to outside edge.Measurement from inside edge of mounting hole to inside edge of bolt hole.Bolt hole diameter: measure from inside edge of bolt hole to opposite inside edge.More items...

How do you tell if your rotors are too thin?

2:133:01How To Tell If Your Car Needs New Rotors-What To Look For - YouTubeYouTubeStart of suggested clipEnd of suggested clipNumber one is when they are too thin. And that is when you feel for the lip on your rotor. Then theyMoreNumber one is when they are too thin. And that is when you feel for the lip on your rotor. Then they could be getting thin.

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