Search Results

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

Road Vehicles - Friction Materials - Elastic Properties Measurements

2023-04-21

CURRENT

J2725_202304

This SAE Standard specifies a method for testing and measuring elastic constants in friction materials by precise ultrasonic velocity measurements. Measurement methods are also described for measurement of the out-of-plane modulus as a function of pre-load as well as the measurement of engineering constants as a function of temperature. Finally, methods are formulated to produce all engineering constants as a function of pre-load and temperature.

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

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

Road Vehicles - Friction Materials - Elastic Properties Measurements

2017-09-29

HISTORICAL

J2725_201709

This SAE Standard specifies a method for testing and measuring elastic constants in friction materials by precise ultrasonic velocity measurements. Measurement methods are also described for measurement of the out-of-plane modulus as a function of pre-load as well as the measurement of engineering constants as a function of temperature. Finally, methods are formulated to produce all engineering constants as a function of pre-load and temperature.

Standard

Thermal Transport Properties Germane to Friction Materials and Brakes

2017-02-02

CURRENT

J2581_201702

This SAE Information report defines the thermal transport properties important in the assessment of heat management capability of brake lining, shoe, disc and drum materials. The report discusses thermal diffusivity, specific heat capacity, thermal conductivity and thermal expansion. Measurement techniques for the appropriate ASTM standards are identified. The thermal transport properties discussed are material sample properties, not the properties of entire components such as pad assemblies.

Standard

Specific Gravity of Friction Material

2017-02-02

CURRENT

J380_201702

Specific gravity is a nondestructive test used as a quality control check of the consistency of formulation and processing of brake lining. 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. Specific gravity alone shows nothing about a materials in use performance. The specific gravity of sintered metal powder friction materials, particularly those which have steel backing members, is usually determined somewhat differently. Reference ASTM B 376.

Standard

Hardness of Brake Lining

2015-08-27

CURRENT

J2654_201508

Hardness measurements are used as a quality control check of the consistency of formulation and processing of brake linings. This hardness method is nondestructive. NOTE—This method is not a measure of friction level. The hardness and the range of hardness are characteristic of each formulation; therefore, the acceptable values and ranges must be established for each formulation and may be affected by processing. NOTE—The hardness of sintered powder metal lining is usually determined with Rockwell superficial hardness equipment. (See ASTM B 347)

Standard

Measurement of Copper and Other Elements in Brake Friction Materials

2015-05-07

HISTORICAL

J2975_201505

This procedure describes a method for generating, preparing and analyzing samples of new and unused brake friction materials for their chemical constituents.

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

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.

Standard

Hardness of Brake Lining

2012-04-19

HISTORICAL

J2654_201204

Hardness measurements are used as a quality control check of the consistency of formulation and processing of brake linings. This hardness method is nondestructive. The hardness and the range of hardness are characteristic of each formulation; therefore, the acceptable values and ranges must be established for each formulation and may be affected by processing.

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

Thermal Transport Properties Germane to Friction Materials and Brakes

2011-03-08

HISTORICAL

J2581_201103

This SAE Information report defines the thermal transport properties important in the assessment of heat management capability of brake lining, shoe, disc and drum materials. The report discusses thermal diffusivity, specific heat capacity, thermal conductivity and thermal expansion. Measurement techniques for the appropriate ASTM standards are identified. The thermal transport properties discussed are material sample properties, not the properties of entire components such as pad assemblies.

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

Specific Gravity of Friction Material

2009-08-26

HISTORICAL

J380_200908

Specific gravity is a nondestructive test used as a quality control check of the consistency of formulation and processing of brake lining. 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. Specific gravity alone shows nothing about a materials in use performance. The specific gravity of sintered metal powder friction materials, particularly those which have steel backing members, is usually determined somewhat differently. Reference ASTM B 376.

Standard

Road Vehicles—Friction Materials—Elastic Properties Measurements

2009-01-20

HISTORICAL

J2725_200901

This SAE Standard specifies a method for testing and measuring elastic constants in friction materials by precise ultrasonic velocity measurements.

Standard

Hardness of Brake Lining

2004-08-16

HISTORICAL

J2654_200408

Hardness measurements are used as a quality control check of the consistency of formulation and processing of brake linings. This hardness method is nondestructive. The hardness and the range of hardness are characteristic of each formulation; therefore, the acceptable values and ranges must be established for each formulation and may be affected by processing.

Standard

Thermal Transport Properties Germane to Friction Materials and Brakes

2003-09-05

HISTORICAL

J2581_200309

This SAE Information report defines the thermal transport properties important in the assessment of heat management capability of brake lining, shoe, disc and drum materials. The report discusses thermal diffusivity, specific heat capacity, thermal conductivity and thermal expansion. Measurement techniques for the appropriate ASTM standards are identified. The thermal transport properties discussed are material sample properties, not the properties of entire components such as pad assemblies.

Standard

Test Procedures for Brake Shoe and Lining Bonds

1998-06-01

HISTORICAL

J840_199806

This SAE Recommended Practices covers equipment and procedures for qualification of bonded or integrally molded drum and disc shoe and lining assemblies. It also provides some short, semi-quantitative test procedures for checking bonding or molding process control.