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 1—This machine may also be used to measure coefficient of friction.
No further reproductions authorized. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. The contact can be a test material against steel or against itself. Need help or have a question? Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
NOTE 4—Check compatibility of the test specimen cleaning procedure and reagents with the speci? This test data would zstm used for the design of gears and bushings.
This manufacturer recommends a maximum test load of lb kg. NOTE 2—Petroleum distillates, formerly used as solvents, have been eliminated due to possible toxic effects.
Coefficient of Friction ASTM D3702
Polyamide Type at PV2: Contact pressure, rotational velocity RPMand the number of cycles hours must be specified for each test. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Inspection Validating the specifications, value and safety of your raw materials, products and assets.
V3702 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. It is generally believed that useful wear rate precision 1.
NOTE 6—A chart recorder can be used to continuously record torque throughout the test. Weights are added to provide the desired contact pressure, and the rotational velocity is set. The contact area is 1. A number in parentheses indicates the year of last reapproval. A built-in tachometer provides speed indication. Send us a request Need help or have a question? Typical spindle speed range is 10 to rpm. It is the responsibility of the user of this standard d33702 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Torque the bolt to 6. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. Typical wear rates for some commonly used materials at different PV levels are: Validating the specifications, value and safety of your raw materials, products and assets. Standards can be obtained from appropriate standards xstm.
Wear in h round robins averaged 0. Wear rate can be calculated as either in. Assurance Testing Inspection Certification.
Send us a request Wilton UK: A break-in period, typically 40 hours, is run to ensure intimate contact between the mating parts. Permission rights to photocopy the standard may also be secured from the ASTM website www. Originally approved in The mean rubbing velocity is related to spindle rotational speed: Load is obtained by application of dead weights to the Test durations will often be in the 50 to h range. The specimen is fixed into the sample holder using a pin and a bolt, and this assembly is inserted into the tester.
Subscripts 2a, 2b, 2c, and 2d are the corresponding? If you feel that your comments have not received s3702 fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Coefficient of Friction ASTM D
Due to copyright restrictions, we are not able to provide copies of standards. Global D302 Intertek is the industry leader with over 42, people in 1, locations in over countries.
It is the product of a restraining force and the radius at which it acts to balance the frictional torque. This test method evaluates the performance of materials in rubbing contact under end use type conditions.
Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Refer to Table 1 to convert the speci? Reagents and Materials 6. Your comments are invited either for aatm of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Each test consists of break-in for 40 h followed by a selected test duration, each at the same selected normal load and speed.