JIS C7801 AMD 1-2012 一般照明灯具的测量方法(修改件1)

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标准名称：	热切割 气割表面质量样板
中标分类：	机械 >> 金属切削机床 >> 特种加工机床
替代情况：	被JB/T 10045.5-1999代替
发布日期：
实施日期：	1991-01-01
首发日期：
作废日期：
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Product Code:SAE J1801
Title:Brake Effectiveness Marking For Brake Blocks
Issuing Committee:Truck And Bus Foundation Brake Committee
Scope:This SAE Recommended Practice provides the method to assign numerical values of brake effectiveness, using data from single station inertia dynamometer effectiveness tests, and to identify a uniform procedure to mark these values on the edge of brake blocks in excess of 12.7 mm (0.51 in) in thickness.The edge markings are intended to provide relevant and meaningful data on the normal and hot effectiveness of brake blocks, using the reference full size brake assembly, to aid in the characterization of these brake block frictional properties.This edge marking methodology is intended to permit accurate identification of the effectiveness values over the full wear life of the brake block. This is accomplished by means of permanent markings on one edge of the brake block.