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 Testing Inspection Certification. Acetal homopolymer at PV2: NOTE 5—Calibrate torque meter such that the anticipated test torque is approximately two-thirds of calibration value. 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.

Contact pressure, rotational velocity RPMand the number of cycles hours must be specified for each test. Auditing Consulting Sourcing Training.

Standards can be obtained from appropriate standards authorities. The test specimen is machined from a larger sample of the test material. Need help or have a question? Test asgm are machined into a disk approximately 1.

Coefficient of Friction ASTM D

Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. The lever arm may be balanced to compensate for the weight of the stationary washer.

Last previous edition approved in as D—94 The contact area is 1. Torque the bolt to 6.

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 mean rubbing velocity is related to spindle rotational speed: 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.

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Typical spindle speed range is 10 to rpm. Preparation of Apparatus 7. Wear in h round robins averaged 0. Each user should select a solvent that can meet applicable safety requirements and thoroughly clean machine parts. This test method evaluates the performance of materials in rubbing contact under end use type d372.

A number in parentheses indicates the year of last reapproval. The specimen is fixed into the sample holder using a pin and a bolt, and this assembly is inserted into the tester. 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 sample is then weighed and measured, and the test begins. Current edition approved Oct. Refer to Table 1 to convert the speci? Whether your business is local or global, we can ensure your products meet quality, health, environmental, x3702, and social accountability standards for virtually any market around the world.

Wear rate can be calculated as either in.

Inspection Validating the specifications, value and safety of your raw materials, products and assets. It is the product of a restraining force and the radius at which it acts to balance the frictional torque.

Summary of Test Method 3. A built-in tachometer provides speed indication. The test specification refers to self-lubricating materials – d7302 lubrication is not part of the specification.

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AA, the hardness Rc 20 6 5. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Mark the test specimen inside the raised test surface so subsequent measurements can be made at the same places.

PV limit pressure x velocity is the point at which the material fails catastrophically. Reagents and Materials 6. NOTE 1—This machine may also be used to measure coefficient of friction. Test durations will often be in the 50 to h range. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.

The contact can be a test material against steel or against itself. A break-in period, typically 40 hours, is run to ensure intimate contact between the mating parts. Optional controlled pneumatic loading systems are available to replace applications of dead weight. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend.

Coefficient of Friction ASTM D3702

Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory asfm prior to use. In cases where materials, products, or equipment are available only in inch-pound units, SI values in parentheses are for information only.