From which part of the brake lining is it measured when determining riveted brake lining?

The measurement of riveted brake lining is specifically taken from the rivet. This is crucial because the rivets are the components that physically attach the brake lining to the brake shoe, and measuring from this point ensures that the thickness of the lining is assessed accurately in relation to its functional attachment.

When evaluating riveted brake linings, the condition and depth of the lining directly affect braking performance. If the lining wears down too thin, it can lead to insufficient braking force, potentially resulting in safety hazards. Thus, establishing a measurement from the rivet provides a precise reference that aligns with the optimal functionality of the braking system.

Other options do not offer a suitable reference point for measurement. For example, measuring from the shoe or the wheel hub does not account for the actual usable thickness of the lining material. The brake drum would not yield an accurate reading of the lining thickness either, since its purpose is to house the brake assembly rather than serve as a reference for the lining's condition. Therefore, focusing on the rivets is essential for accurate evaluation and maintenance of brake linings.