ASTM D() – 橡胶/塑料/铁件 磨损率试验标准. ASTM D(). Standard Test Method for Wear Rate and Coefficient of Friction of Materials in Self-Lubricated Rubbing Contact Using. ASTM D(04) – Download as PDF File .pdf), Text File .txt) or read online.

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NOTE 2—Petroleum distillates, formerly used as solvents, have been eliminated due to possible toxic effects.

Coefficient of Friction ASTM D3702

Acetal homopolymer at PV2: Summary of Test Method 3. An elapsed time indicator with reset feature to indicate motor running time should be included.

Individual reprints single or multiple copies of asttm standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Refer to Table 1 to convert the speci?

Coefficient of Friction ASTM D

The specimen is fixed qstm the sample holder using a pin and a bolt, and this assembly is inserted into the tester. Typical spindle speed range is 10 to rpm. The mean rubbing velocity is related to spindle rotational speed: Each user should select a solvent that can meet applicable safety requirements and thoroughly clean machine parts.

Precision and Bias If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

Subscripts 2a, 2b, 2c, and 2d s3702 the corresponding? AA, the hardness Rc 20 6 5.

Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Test durations were h, except for round robin 1 where they ranged from to h.


Certification Formally confirming that your products and services meet all trusted external and internal standards. NOTE 5—Calibrate torque meter such that the anticipated test torque is approximately two-thirds of calibration value. Load is obtained by application of dead weights to the Standards can be obtained from appropriate standards authorities.

Users of this standard s3702 expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

A number in parentheses indicates the year of last reapproval. Falex Friction and Wear test machine. Test materials are machined into a disk approximately 1. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. A break-in period, typically 40 hours, is run to ensure intimate contact between the mating parts. Auditing D3720 Sourcing Training. Whether your business is local or global, we can ensure your products meet quality, health, environmental, safety, and social accountability standards for virtually any market around the world.

It is recommended that clean cotton gloves or clean tweezers or tongs be used. Each test consists of break-in for 40 h followed by a d370 test duration, each at the same selected normal load and speed. It is the product of a restraining force and the radius at 3d702 it acts to balance the frictional torque. Reagents and Materials 6.

Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Formally confirming that your products and s3702 meet all trusted external and internal standards. NOTE 6—A chart recorder can be used to continuously record torque throughout the test.


Wear rate can be calculated as either astj. Last previous edition approved in as D—94 This test data would be used for the design of gears and bushings. It is generally believed that useful wear rate precision 1. Validating the specifications, value and safety of your raw materials, products and assets. PV limit pressure x velocity is the point at which the material fails catastrophically. Torque the bolt to 6. Weights are added to provide the desired contact pressure, and the rotational velocity is set.

The lever arm may be balanced to compensate for the weight of the stationary washer. Wear in h round robins averaged 0. Permission rights to photocopy the standard may also be secured from the ASTM website www.

Optional controlled pneumatic loading systems are available to replace applications of dead weight. The contact can be a test material against steel or against itself. Need help or have a question? The contact area is 1.

The test sample is then weighed and measured, and the test begins. Contact pressure, rotational velocity RPMand the number of cycles hours must be specified for each test. Send us a request Wilton UK: