ASTM G – Free download as PDF File .pdf), Text File .txt) or read online for free. ASTM G 2. Referenced Documents ASTM Standards: B Test Method for Dynamic Coefficient of Friction and. Wear of Sintered Metal Friction Materials Under Dry. ASTM G Standard Guide for Measuring and Reporting Friction Coefficients.
|Country:||Central African Republic|
|Published (Last):||8 December 2014|
|PDF File Size:||16.6 Mb|
|ePub File Size:||17.83 Mb|
|Price:||Free* [*Free Regsitration Required]|
Originallypublished as G – General friction testing precautions are citedand a prescribed method of recording friction data is recom-mended.
We are always happy to assist you. We are nonprofit website to share and download documents. Test surfaces that are prone to blocking or interlock-ing of surface features are particularly prone to showing abreakaway force spike.
Any of the listed tests or other acceptedtests may be used. The appropriate device to use satm the onethat closely simulates a tribosystem of interest. No other units of measurement are included in this standard. The use of the suggested reporting form will increase the long-term usefulness of the test results within a given laboratory and will facilitate the exchange of test results between laboratories.
ASTM G – 04 Standard Guide for Measuring and Reporting Friction Coefficients
In this case an elastic frictionmeasuring system would be appropriate. Standard Costing Jul 25, When pulling a steelcable over the same roll, it would be more appropriate to use astiff testing system. Other important factors to simulate arenormal force contact pressurevelocity, t115 of motion reciprocating versus unidirectional and environment.
Their use will significantly reduce the need for each laboratory to do asrm own testing. All materials on our website are shared by users. It is hoped that the use of a uniform reporting format will provide the basis for the preparation of handbooks and computerized databases. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
April Current version: We Need Your Support. Please download to get full document. Asuperscript epsilon e indicates an editorial change since the last revision or reapproval.
Requirements for minimum data and a format for presenting these data are suggested. Each triboelementcontains one or more tribosurfaces. This guide is intended to promote the use of thisstandard reporting system and standard friction test methods. The overall goal of this guide is to provide a reporting formatthat will enable computer databases to be readily established.
G 40— 93 3. Requirements for minimum data and a format for present-ing these data are suggested.
Blocking is a term used to describe thetendency of some plastic materials to stick to each other afterlong f115 of contact.
These databases can be searched for material couples and tribosystems of interest. If you have any questions about copyright issues, please report us to resolve them. If an application involves materialssuch as friction composites, one of the brake type dynamom-eter tests may be appropriate.
To the running of this website, we need your help to astmm us. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
This breakaway force is commonlyused to calculate static friction Fig. Current edition approved October 10, Link to Active This link will always route to the current Active version of the standard. These databases can be searched for material couples andtribosystems of interest. Weartest machines are often equipped with sensors to measurefriction forces also.
A number in parentheses indicates the year of last reapproval. In addition, elastic beams containing straingages may produce different friction responses than a more rigid load celleven if used on the same friction testing machine.
Plasticizer migration can be the cause. Sufficient information wstm test conditions will be available to determine applicability of the friction data to the engineer’s specific needs.
A superscript asmt e indicates an editorial change since the last revision xstm reapproval. Friction Wear Force Abrasive Shoe. Last previous edition G – 93 e 1. G 40 — The usual manifestation is a cycling decrease andsubsequent increase in the friction force as sliding proceeds Fig.
It is hoped that the use of auniform reporting format will provide the basis for the prepa-ration of handbooks and computerized databases. Historical Version s – view previous versions of standard.
The overall goal of this guide wstm to provide a reporting format that will enable computer databases to be readily established.