This standard specifies the terms and definitions, classification, requirements, test methods, inspection rules, as well as marking, packaging, transport and storage for clutch facings for automobiles.
This standard is applicable to dry friction clutch facings for automobiles (hereinafter referred to as facings).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection (GB/T 2828.12003, ISO 2859-1, IDT)
GB 5763-2008 Brake linings for automobiles
JB/T 7498 Coated abrasives - Abrasive paper
JC/T 1065 Constant speed friction test machine
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB 5763-2008 and the following apply.
3.1
max flexibility (δ)
during bending test, the deviation distance from the top or bottom surface of the test piece span center to the original position at which the test piece bursts
