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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Summary of Test Method 3.

Acetal homopolymer at PV2: Standards can be obtained from appropriate standards authorities. Each test consists of break-in for 40 h followed by a selected test duration, each at the same selected normal load and speed. Current edition approved Oct. Falex Friction and Wear test machine. Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries.

The lever arm may be balanced to compensate for the weight of the stationary washer. 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. 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.

Coefficient of Friction ASTM D3702

Send us a request Need help or have a question? The asrm of this test method should determine to his own satisfaction whether the results of this test procedure atm with? Typical spindle speed range is 10 to rpm. It is the product of a restraining force and the radius at which it acts to balance the frictional torque. Wear rate can be calculated as either in. No further reproductions authorized. The test sample is then weighed and measured, and the test begins.

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Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. AA, the hardness Rc 20 6 5. 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.

Inspection Validating the specifications, value and safety of your raw materials, products and assets.

Subscripts 2a, 2b, 2c, and asmt are the corresponding? Test durations were h, except for round robin 1 where they ranged from to h. The test specification refers to self-lubricating materials – external lubrication is not part of the specification. Formally confirming that your products and services meet all trusted external and internal standards. The contact area is 1. Validating the specifications, value d370 safety of your raw materials, products and assets. Certification Formally confirming that your products and services meet all trusted external and internal standards.

Torque axtm bolt to 6. Need help or have a question? Originally approved in Precision and Bias Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Wear in h round robins averaged 0. Refer to Table 1 to convert the speci? It is generally believed that useful wear rate precision 1.

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Coefficient of Friction ASTM D

Mark the test specimen inside the raised test surface so subsequent measurements can be made at the same places. The test specimen is machined from a larger sample of the test material. Optional controlled pneumatic loading systems are available to replace applications of dead weight. NOTE 6—A chart recorder can be used to continuously record torque throughout the test.

NOTE 5—Calibrate torque meter such that the anticipated test torque is approximately two-thirds of calibration value.

Due to copyright restrictions, we are not able to provide copies of standards. Permission rights to photocopy the standard may also be secured from the ASTM website www. This test method evaluates the performance of materials in rubbing contact under end use type conditions.

A number in parentheses indicates the year of last reapproval. This test data would be used for the aztm of gears and bushings. A built-in tachometer provides speed indication. Send us a request Wilton UK: Polyamide Type at PV2: It is recommended that clean cotton gloves or clean tweezers or tongs be used. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

Preparation of Apparatus d37002. In cases where materials, products, or equipment are available only in inch-pound units, SI values in parentheses are for information only.