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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Evaluating how asrm products and services meet and exceed quality, safety, sustainability and performance standards. Permission rights to photocopy the standard may also be secured from the ASTM website www. Subscripts 2a, 2b, 2c, and 2d are asrm corresponding? 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. Refer to Table 1 to convert the speci?

NOTE 2—Petroleum distillates, formerly used as solvents, have been eliminated due to possible toxic effects. 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 lever arm may be balanced to compensate for the weight of the stationary washer.

Acetal homopolymer at PV2: It is generally believed that useful wear rate precision 1. The contact can be a test material against steel or against itself. Need help or have a question? Current edition approved Oct. Validating the specifications, value and safety of your raw materials, products and assets. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. If the test conditions are changed, the wear rates may change and the relative value of one material with respect to another may also change.

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Coefficient of Friction ASTM D3702

The test specimen is machined from a larger sample of the test material. Each user should select a solvent that can meet applicable safety requirements and thoroughly clean machine parts. This test data would be used astk the design of gears and bushings. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Typical spindle speed range is 10 to rpm.

Coefficient of Friction ASTM D

No further reproductions authorized. Auditing Consulting Sourcing Training. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Wear rate can be calculated as either in.

Send us a request Need help or have a question? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Inspection Validating the specifications, value and safety of your raw materials, products and assets.

If you feel that your comments d33702 not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.

Wear in h round robins averaged 0.

The test specification refers to self-lubricating materials – external lubrication is not part of the specification. Weights are added to provide the desired contact pressure, and the rotational velocity is set. Precision and Bias 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.

Originally approved in A built-in tachometer provides speed indication. Acetal homopolymer at PV1: This manufacturer recommends a maximum test load of lb kg. Preparation of Apparatus 7. Optional controlled pneumatic loading systems are available to replace applications d370 dead weight.

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Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you atsm attend. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Your comments will receive careful consideration at sstm meeting of the responsible technical committee, which you may attend.

The test sample is then s3702 and measured, and the test begins. PV limit pressure x velocity is the point at which the material fails catastrophically. Typical wear rates for some commonly used materials at different PV levels are: Zstm is the product of a restraining force and the radius at which it acts to balance the frictional torque. Test durations were h, except for round robin 1 where they ranged from to h.

In cases where materials, products, or equipment are available only in inch-pound units, SI values in parentheses are for information only.

Last previous edition approved in as D—94 asrm NOTE 6—A chart recorder can be used to continuously record torque throughout the test. Summary of Test Method 3. Load is obtained by application of dead weights to the Falex Friction and Wear test machine.

An elapsed time indicator with reset feature to indicate motor running time should be included. Test durations will often be in the 50 to h range. A number in parentheses indicates the year of last reapproval.