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Chassis Brake Linings Standards Committee Vehicles and equipment

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Standard

Anti-Noise Brake Pads Shims: T-pull Test
2009-09-30
CURRENT
J2694_200909
This recommended practice covers the attachment of bonded anti-noise brake pad shims only. Mechanically attached shims (those without bonding) are not covered by this procedure.
Standard

BRAKE LINING QUALITY TEST PROCEDURE
1997-02-01
HISTORICAL
J661_199702
The purpose of this SAE Recommended Practice is to establish a uniform laboratory procedure for securing and reporting the friction and wear characteristics of brake linings. The performance data obtained can be used for in-plant quality control by brake lining manufacturers and for the quality assessment of incoming shipments by the purchasers of brake linings.
Standard

Best Practices to Define, Dimension, and Measure Disc Brake Plates for Manufacture
2018-01-17
WIP
J3167
Best Practices for defining the dimensional requirements of backing plates on the drawings themselves, and defining the measuring procedures used to validate those dimensions. The proposed standard employs already established methods such as geometric dimensioning and tolerancing (GD&T), including instruction on its proper application to features specific to backing plates. Current ‘best practices’ of design and drafting in our industry are similarly highlighted; drawing clarity, revision control, and dimensioning for both function and manufacturability. Generic examples are used to illustrate both the advantages of best drafting practices, and the potential failure modes that can result from poor drafting practices. The standard also proposes the best methods of measurement required to properly validate requirements such as feature size and location, surface roughness, plate flatness and bow shape
Standard

Brake Lining Quality Test Procedure
2021-10-26
CURRENT
J661_202110
The purpose of this SAE Recommended Practice is to establish a uniform laboratory procedure for securing and reporting the friction and wear characteristics of brake linings. The performance data obtained can be used for in-plant quality control by brake lining manufacturers and for the quality assessment of incoming shipments by the purchasers of brake linings.
Standard

Brake Lining Quality Test Procedure
2012-11-01
HISTORICAL
J661_201211
The purpose of this SAE Recommended Practice is to establish a uniform laboratory procedure for securing and reporting the friction and wear characteristics of brake linings. The performance data obtained can be used for in-plant quality control by brake lining manufacturers and for the quality assessment of incoming shipments by the purchasers of brake linings.
Standard

DETERMINING THE SPECIFIC GRAVITY OF BRAKE LININGS
1969-02-01
HISTORICAL
J380_196902
Specific gravity is a nondestructive test used as a quality control check of the consistency of formulation and processing of brake lining. Specific gravity alone shows nothing about a lining’s ability to develop friction or to resist fade when used as a friction element in brakes. Specific gravity varies with the formulation of the lining. The specific gravity of sintered metal powder linings, particularly those which have steel backing members, is usually determined somewhat differently. Reference ASTM B 376 “Density of Sintered Metal Friction Material” (latest revision).1 The specific gravity and the range of specific gravity are peculiar to each formulation and, therefore, the acceptable values or range must be established for each formulation by the manufacturer.
Standard

Deflection Measurement for Friction Materials Using Segment Applicator
2022-06-13
CURRENT
J3231_202206
This SAE Recommend Practice specifies a method for measuring the deflection of friction materials and disc brake pad assemblies in a manner more consistent with classical material compressive strain testing. This SAE test method differs from SAE J2468 in the preload and maximum load applied to the test sample when deflection is measured. It adopts the material applied stress levels found in ISO 6310 (0.5 to 8.0 MPa) using a 25 mm diameter flat plunger.
Standard

Desorption of Brake Friction Materials
2023-05-10
CURRENT
J3281_202305
This SAE Recommended Practice specifies a method to reduce and stabilize the moisture of products containing brake friction material (disc brake pads, drum brake shoes, friction blocks) so the parts are conditioned and maintained in a stable low moisture state.
Standard

FRICTION COEFFICIENT IDENTIFICATION SYSTEM FOR BRAKE LININGS
1985-03-01
HISTORICAL
J866_198503
This SAE Recommended Practice is intended to provide a uniform means of identification which may be used to classify the friction coefficient of brake linings, based on data obtained from tests conducted in accordance with SAE J661. Note: It is emphasized that this recommended practice does not establish friction requirements for brake linings, nor does it designate significant characteristics of brake linings which must be considered in overall brake performance. Due to other factors that include brake system design and operating environment, the friction coefficients obtained from this recommended practice can not reliably be used to predict brake system performance.
Standard

FRICTION IDENTIFICATION SYSTEM FOR BRAKE BLOCKS FOR COMMERCIAL VEHICLES
1964-03-01
HISTORICAL
J866_196403
This SAE Recommended Practice is intended to provide a uniform means of identification which may be used to describe the initial friction characteristics only of brake blocks (see SAE J660, Brake Linings) for use on commercial vehicles. NOTE: It is emphasized that this recommended practice does not establish friction requirements for brake blocks, nor does it designate other significant block characteristics which must also be considered in overall brake performance. The basis for determining the friction coefficients for brake blocks are tests conducted in accordance with SAE J661, Brake Lining Quality Control Test Procedures.
Standard

Friction Coefficient Identification System for Brake Linings
2002-04-09
HISTORICAL
J866_200204
This SAE Recommended Practice is intended to provide a uniform means of identification which may be used to classify the friction coefficient of brake linings, based on data obtained from tests conducted in accordance with SAE J661.
Standard

Friction Coefficient Identification and Environmental Marking System for Brake Linings
2019-03-11
CURRENT
J866_201903
This SAE Recommended Practice is intended to provide a uniform means of identification which may be used to classify the friction coefficient of brake linings, based on data obtained from tests conducted in accordance with SAE J661 Brake Lining Quality Test Procedure and SAE J2975 Measurement of Copper and other elements in Brake Friction Materials. NOTE: It is emphasized that this document does not establish friction requirements for brake linings, nor does it designate significant characteristics of brake linings which must be considered in overall brake performance. Due to other factors that include brake system design and operating environment, the friction codes obtained from this document cannot reliably be used to predict brake system performance.
Standard

Friction Coefficient Identification and Environmental Marking System for Brake Linings
2012-01-16
HISTORICAL
J866_201201
This SAE Recommended Practice is intended to provide a uniform means of identification which may be used to classify the friction coefficient of brake linings, based on data obtained from tests conducted in accordance with SAE J661 Chase Test and SAE J2975 Measurement of Copper and other elements in Brake Friction Materials.
Standard

Friction Coefficient Identification and Environmental Marking System for Brake Linings
2012-07-16
HISTORICAL
J866_201207
This SAE Recommended Practice is intended to provide a uniform means of identification which may be used to classify the friction coefficient of brake linings, based on data obtained from tests conducted in accordance with SAE J661 Brake Lining Quality Test Procedure and SAE J2975 Measurement of Copper and other elements in Brake Friction Materials. NOTE: It is emphasized that this document does not establish friction requirements for brake linings, nor does it designate significant characteristics of brake linings which must be considered in overall brake performance. Due to other factors that include brake system design and operating environment, the friction codes obtained from this document cannot reliably be used to predict brake system performance.
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