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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Wear in h round robins averaged 0.
Coefficient of Friction ASTM D
Need help or have a question? Acetal homopolymer at PV2: It is generally believed that useful wear rate precision 1. Mark the test specimen inside the raised test surface so subsequent measurements can be made at the same places.
Send us a request Need help or have a question? Test durations will often be in the 50 to h d3720. Reagents and Materials 6.
Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Last previous edition approved in as D—94 NOTE 5—Calibrate torque meter such that the anticipated test torque is approximately two-thirds of calibration value. This test data would be used for the design of gears and bushings. NOTE 6—A chart recorder can be asgm to continuously record torque throughout the test.
Test durations were h, except for round robin 1 where they ranged from to h. An elapsed time indicator with reset feature to indicate motor running time should be included. Each user should select a solvent that can meet applicable safety requirements and thoroughly clean machine parts.
Formally confirming that your products and services meet all trusted external and internal standards. PV limit pressure x velocity is the point at which the material fails catastrophically. 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. No further reproductions authorized. The specimen is fixed into the sample holder using a pin and a bolt, and this assembly is inserted into the tester.
Acetal homopolymer at PV1: Refer to Table 1 to convert the speci? NOTE 1—This machine may also be used to measure coefficient of friction. Each test consists of break-in for 40 h followed by a selected test duration, each at the same selected normal load and speed.
Send us a request Wilton UK: Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
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. Inspection Validating the specifications, value and safety of your raw materials, products and assets.
It is the product of a atsm force and the radius at which it acts to balance the frictional torque. Standards can be obtained from appropriate standards authorities. Validating the specifications, value and safety of your raw materials, products and assets. Typical wear rates for some commonly used materials at different PV levels are: Polyamide Type at PV2: Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.
Current edition approved Oct. Precision and Bias Users of this d372 are 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.
The test sample is then weighed and measured, and the test begins.
NOTE 4—Check compatibility of the test specimen cleaning procedure and reagents with the speci? NOTE 2—Petroleum distillates, formerly used as solvents, have been eliminated due to possible toxic effects.
Coefficient of Friction ASTM D3702
Typical atsm speed range is 10 to rpm. Weights are added to provide the desired contact pressure, and the rotational velocity is set. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Optional controlled pneumatic loading systems are available to replace applications of dead weight.