Testing the minimum thickness of a brake disc | HELLA
General information
The manufacturer's specification of the minimum thickness defines the wear limit of a brake disc. This value in millimetres has been stamped on the outer edge or on the brake disc chamber.
- MIN TH = Minimum thickness
Testing
Check the wear limit of the brake disc using a suitable tool (brake disc gauge).
- Place a gauge at several measuring points (A) across the friction ring and take measurements.
- Compare the measurement results and compare the lowest value with the setpoint value (minimum thickness).
Once the setpoint value has been reached or undercut, the brake disc must be replaced.
Repair notes
- Always replace brake discs in pairs.
- Only install new brake pads if the minimum thickness of the brake discs has not been undercut.
In this context, please observe the specifications in the maintenance and repair notes provided by the respective vehicle manufacturer.
Important safety note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
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