ASTM D3702 PDF
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 3—Remove all solvents from the washer before testing.
Coefficient of Friction ASTM D3702
Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. No further reproductions authorized. NOTE 2—Petroleum distillates, formerly used as solvents, have been eliminated due to possible toxic effects. The test d37702 is aztm from a larger sample of the test material.
Acetal homopolymer at PV2: Each test consists of break-in for 40 h followed by a selected test duration, each at the same selected normal load and speed.
The specimen is fixed into the sample holder using a pin and a bolt, and this assembly is inserted into the tester. In cases where materials, products, or equipment are available only in inch-pound units, SI values in parentheses are for information only. AA, the hardness Rc 20 6 5.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. A break-in period, typically 40 hours, is run to ensure intimate contact between the mating parts.
NOTE 1—This machine may also be used to measure coefficient of friction. 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. The lever arm may be balanced to compensate for the weight of the stationary washer. Originally approved in NOTE 4—Check compatibility of the test specimen cleaning procedure and reagents with the speci?
Wear in h round robins averaged 0.
This test data would be used for the design of gears and bushings. Certification Formally confirming that your products and services meet all trusted external and internal standards. The contact can be a test material against steel or against itself. Through our network of over 43, people in 1, laboratories and offices in countries, Intertek provides quality and safety solutions to a wide range of industries around the world. The test sample is then weighed and measured, and the test begins.
Coefficient of Friction ASTM D
Auditing Consulting Sourcing Training. Assurance Testing Inspection Certification. The user of this test method should determine to his own satisfaction whether the results of this test procedure correlate with? Each user should asstm a solvent that can meet applicable safety requirements and thoroughly clean machine parts.
Inspection Validating aetm specifications, value and safety of your raw materials, products and assets. Typical wear rates for some commonly used materials at different PV levels are: Send us a request Wilton UK: Mark the test specimen inside the astj test surface so subsequent measurements can be made at the same places. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
NOTE 5—Calibrate torque meter such that the anticipated test torque is approximately two-thirds of calibration value.
A number in parentheses indicates the year of last reapproval. It is the product of a restraining force and the radius at which it acts to balance the frictional torque. Global D702 Intertek is the industry leader with over 42, people in 1, locations in over countries. Optional controlled pneumatic loading systems are available to replace applications of dead weight.
PV limit pressure x velocity is the point at which the material fails catastrophically. Typical d370 speed range is 10 to rpm. Subscripts 2a, 2b, 2c, and 2d are the corresponding? Due to aztm restrictions, we are not able to provide copies of standards. It is recommended that clean cotton gloves or clean tweezers or tongs be used. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
The contact area is 1. Formally confirming that your products and services meet all trusted external and internal standards.
Test durations were h, except for round robin 1 where they ranged from to h. Precision and Bias The mean rubbing velocity is related to spindle rotational speed: Permission rights to photocopy the standard may also be secured from the ASTM website www. Validating the specifications, value and safety of your raw materials, products and assets. Send us a request Need help or dd3702 a question?