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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Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Contact pressure, rotational velocity RPMand the number of cycles hours must be specified for each test.
The specimen is fixed into the sample holder using a pin and a bolt, and this assembly is inserted into the tester. Load is obtained by application of dead weights to the Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend.
Permission rights to photocopy the standard may also be secured from the ASTM website www. Acetal homopolymer at PV1: Standards can be obtained from appropriate standards authorities. Mark the test specimen inside the raised test surface so subsequent measurements can be made at the same places. The contact can be a test material against steel or against itself. The test specification refers to self-lubricating materials – external lubrication is not part of the specification.
Typical wear rates for some commonly used materials at different PV levels are: A built-in tachometer provides speed indication.
The mean rubbing velocity is related to spindle rotational speed: This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Weights are added to provide the desired contact pressure, and the rotational velocity is set. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Precision and 3d702 Acetal homopolymer at PV2: Test durations will often be in the 50 to h range.
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. An elapsed time indicator with reset feature to indicate motor running time should be included. Wear in h round robins averaged 0.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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. Typical spindle speed range is 10 to rpm.
Due to copyright restrictions, we are not able to provide copies of standards. Last previous edition approved in as D—94 AA, the hardness Rc 20 6 5. Refer to Table 1 to convert the speci? Need help or have a question? 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 test sample is then weighed and measured, and the test begins. PV limit pressure x velocity is the point at which the material fails catastrophically.
Subscripts 2a, 2b, 2c, and 2d are the corresponding? Inspection Validating the specifications, value and safety of your raw materials, products and assets.
Coefficient of Friction ASTM D3702
This test data would be used for the design of gears and bushings. Test durations were h, except for round robin 1 where they ranged from to h. This manufacturer recommends a maximum test load of lb kg. NOTE 1—This machine may also be used to measure coefficient of friction. Certification Formally confirming that your products and services meet all trusted external and internal standards.
Users of this standard 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.
Coefficient of Friction ASTM D
The lever arm may be balanced to compensate for the weight of the stationary washer. The contact area is 1. Current edition astn Oct.
Wear rate can be calculated as either in. Falex Friction and Wear test machine. Send us a request Need help or have a question? It is recommended that clean cotton gloves asstm clean tweezers or tongs be used. Optional controlled pneumatic loading systems are available to replace applications of dead weight.