-
ASTM D566 standard test method for dropping point of lubricating grease
6. Apparatus6.1 Grease Cup - A chromium-plated brass cup conforming to the dimensions shown in Fig.1.6.2 Test Tube - A test tube of heat-resistant glass, with rim, 100 to 103 mm in length and 11.1 to 12.7 mm in inside diameter provided with three indentations about 19mm from the bottom, equally spaced ...
-
ASTM D566 standard test method for dropping point of lubricating grease
4. Summary of Test Method4.1 A sample of lubricating grease contained in a cup suspended in a test tube is heated in an oil bath at a prescribed rate. The temperature at which material falls from the hole in the bottom of the cup is averaged with the temperature of the oil bath and recorded as the dropping ...
-
ASTM D566 standard test method for dropping point of lubricating grease
1. Scope1.1 This test method covers the determination of the dropping point of lubricating grease.1.2 This test method is not recommended for use at bath temperatures above 288°C. For higher temperatures, Test Method D2265 should be used.1.3 The values stated in SI units are to be regarded as standard. ...
-
ASTM D2783 for extreme-pressure properties (Four-ball method)
11. Precision and Bias11.1 Precision - The following criteria should be used for judging acceptability of results (95% probability) for lubricating fluids which follow the compensation line and have weld points of 400kg or less.11.1.1 Load-Wear Index:11.1.1.1 Repeatability - The difference between successive ...
-
ASTM D2783 for extreme-pressure properties (Four-ball method)
10. Calculations and Reports10.1 Corrected Load - Calculate and record (Table 1, Column 5) for each applied load between the last nonseizure load and weld point using the equation10.2 Load-Wear Index - Calculate and report the load-wear index (formerly Mean-Hertz Load) in kilograms-force using the equation:Load ...
-
ASTM D2783 for extreme-pressure properties (Four-ball method)
9. Procedure9.1 Place the three test balls in the test-lubricant cup. Place the lock ring over the test balls and screw down the nut securely (Note 5). Pour the lubricating fluid to be tested over the three test balls until they are covered.NOTE 5 - Subsequent independent investigations reported in 1971 ...
-
ASTM D2783 for extreme-pressure properties (Four-ball method)
6. Apparatus6.1 Four-Ball Extreme-Pressure Tester, illustratedin Figs.2 and 3.NOTE 1 - It is important to distinguish between the four-ball EP tester and the four-ball wear tester. The four-ball EP tester is designed for testing under more severe conditions and lacks the sensitivity necessary for the ...
-
ASTM D2783 for extreme-pressure properties (Four-ball method)
4. Summary of Test Method4.1 The tester is operated with one steel ball under load rotating against three steel balls held stationary in the form of a cradle. Test lubricant covers the lower three balls. The rotating speed is 1760 6 40 rpm. The machine and test lubricant are brought to 18 to 35°C (65 ...
-
ASTM D2783 for extreme-pressure properties (Four-ball method)
3. Terminology3.1 Definitions:3.1.1 compensation line - a line of plot on logarithmic paper, as shown in Fig.1, where the coordinates are scar diameter in millimetres and applied load in kilograms-force (or newtons), obtained under dynamic conditions.3.1.1.1 Discussion - Coordinates for the compensation ...
-
ASTM D2783 for extreme-pressure properties (Four-ball method)
1. Scope1.1 This test method covers the determination of the load-carrying properties of lubricating fluids. The following two determinations are made:1.1.1 Load-wear index (formerly Mean-Hertz load).1.1.2 Weld point by means of the four-ball extreme-pressure (EP) tester.1.2 For the determination of ...
