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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This test data would be used for the design of gears and bushings. 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. NOTE 6—A chart recorder can be used to continuously record torque throughout the test. Asfm contact area is 1.
The test specification refers to self-lubricating materials – external lubrication is not part of the specification. Acetal homopolymer at PV1: Weights are added to provide the desired contact pressure, and the rotational velocity is set. Test durations were h, except for round robin 1 where they ranged from to h.
Coefficient of Friction ASTM D
Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries. The specimen is fixed into d3072 sample holder using a pin and a bolt, and this assembly is inserted into the tester. Last previous edition approved in as D—94 PV limit pressure x velocity is the point at which the material fails catastrophically.
Due to copyright restrictions, we are not able to provide copies of standards. 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. This test method evaluates the performance of materials in rubbing contact under end use type conditions. Preparation of Apparatus 7. Originally approved in A number in parentheses indicates the year of last reapproval.
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. The test specimen is machined from a larger sample of the test material.
Test durations will often be in the 50 to h range. NOTE 4—Check compatibility of the test specimen cleaning procedure and reagents with the speci? It is the product of a restraining force and the radius at which it acts to balance the frictional torque. The lever arm may be balanced to compensate for the weight of the stationary washer. Reagents and Materials 6.
NOTE 1—This machine may also be used to measure coefficient of friction. A built-in tachometer provides speed indication.
Precision and Bias Contact pressure, rotational velocity RPMand the number of cycles hours must be specified for each test. A break-in period, typically 40 hours, is run to ensure intimate contact between the mating parts. Wear in h round robins averaged 0.
Coefficient of Friction ASTM D3702
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? 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. 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.
No further reproductions authorized. Your comments will receive careful consideration at a asttm of the d33702 technical committee, which you may attend. Each user should select a solvent that can meet applicable safety requirements and d302 clean machine parts. Inspection Validating the specifications, value and safety of your raw materials, products and assets.
Torque the bolt to 6. In cases where materials, products, or equipment are available only in inch-pound units, SI values in parentheses are for information only. AA, the hardness Rc 20 6 5. The user of this d3720 method should determine to his own satisfaction whether the results of this test procedure correlate with? Falex Friction and Wear test machine. Standards can be obtained from appropriate standards authorities.
Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Auditing Consulting Sourcing Training. Test materials are machined into a disk approximately 1. An elapsed time indicator with reset feature to indicate motor running time should be included. Refer to Table 1 to convert the speci? Wear rate can be calculated as either in.