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.
|Published (Last):||14 June 2013|
|PDF File Size:||20.31 Mb|
|ePub File Size:||16.38 Mb|
|Price:||Free* [*Free Regsitration Required]|
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.
Each test consists of break-in for 40 h followed by a selected test duration, each at the same selected normal load d302 speed. Certification Formally confirming that your products and services meet all trusted external and internal standards.
The lever arm may be balanced to compensate for the weight of the stationary washer.
Inspection Validating the specifications, value and safety of your raw materials, products and assets. Refer to Table 1 to convert the speci?
A built-in tachometer provides speed indication. Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries.
Send us a request Need help or have a question? NOTE 5—Calibrate torque meter such that the anticipated test torque is approximately two-thirds of calibration value. Current edition approved Oct. Acetal homopolymer at PV1: Last previous edition approved in as D—94 Test durations will often be in the 50 to h range. Wear in h round robins averaged 0. AA, the hardness Rc 20 6 5. 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.
Precision and Bias The test specification refers to self-lubricating materials – external lubrication is not part of the specification. 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.
Preparation of Apparatus 7. NOTE 2—Petroleum distillates, formerly used as solvents, have been eliminated due to possible toxic effects.
The contact can be a test e3702 against steel or against itself.
Coefficient of Friction ASTM D3702
Auditing Consulting Sourcing Training. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which d3720 may attend. Need help or have a question? NOTE 4—Check compatibility of the test specimen cleaning procedure and reagents with the speci?
An elapsed time x3702 with reset feature to indicate motor running time should be included. Optional controlled pneumatic loading systems are available to replace applications of dead weight. Standards can be obtained from appropriate standards authorities. Summary of Test Method 3.
Coefficient of Friction ASTM D
The user of this test d702 should determine to his own satisfaction whether the results of this test procedure correlate with?
It is the product of a restraining force and the radius at which it acts to balance the frictional torque. Subscripts 2a, 2b, 2c, and 2d are the corresponding?
The contact area is 1. Due to copyright restrictions, we are not able to provide copies of standards.
Originally approved in Enabling you to sstm and mitigate the intrinsic risk in your operations, supply chains and business processes. Typical spindle speed range is 10 to rpm.