1、 FORD LABORATORY TEST METHOD BJ 101-04 Date Action Revisions 2001 07 24 Revised Editorial no technical change A. Cockman 1998 09 01 Printed copies are uncontrolled Page 1 of 4 Copyright 2001, Ford Global Technologies, Inc. MEASUREMENT OF FILM LIFE AND ANTI-WEAR PROPERTIES OF GREASES AND DRY FILM LUB
2、RICANTS Application This procedure is used to determine the film life and anti-wear properties of greases and dry film lubricants by means of the Timken Extreme Pressure Machine operating at 800 rpm. Description of Test A Timken roller bearing cup is attached to the rotating shaft of the Timken mach
3、ine. A rectangular test block is brought into contact with the cup at a prescribed load, after the cup and block are film coated with a given amount of test lubricant. The lubricant is evaluated by the width of the wear scar which occurs on the test block in a prescribed time. Apparatus Required Tim
4、ken Extreme Pressure Machine (see attached drawing) Source: Falex Corporation 1020 Airpark Dr. Sugar Grove, IL 60554 Phone: (630) 556-3669 Fax: (630) 556-3679 Required is a 2 hp, 1750 rpm motor and an adjustable pulley of variable diameter to obtain a spindle speed of 800 +/- 5 rpm and a sliding spe
5、ed of approximately 122 m/minute. The pump shall not be used during this test since no liquid lubricant will be circulated. Balance Accurate to 0.001 g. Weight Loading Mechanism A mechanism must be used to raise and lower the load applying arm at a constant speed of 25 mm per minute to avoid impact
6、of the cup on the test block. A suitable loader can be obtained from Falex Corporation. FORD LABORATORY TEST METHOD BJ 101-04 Page 2 of 4 Copyright 2001, Ford Global Technologies, Inc. Stopwatch or Timing Device The time piece shall be capable of measuring 8 h +/- 1.0 minutes. Microscope A low power
7、 50X to 60X microscope fitted with a filar eyepiece is used to measure width of wear scar with an accuracy of +/- 0.05 mm. Materials Required Naphtha, Stoddard Solvent, Kerosene or Pentane These may be used for cleaning the test blocks and cups, machine spindle, and block holder. Do not use chlorina
8、ted solvents inasmuch as they may impart a surface film which may give erroneous results. Caution: Low flash point. Refer to Fire Control Bulletin No. 18. Refer to Industrial Hygiene for health and safety comments. Industrial Hygiene Field Service Telephone: (313) 33-78955. Test Cups Timken test cup
9、s, No. T-48654, similar to the outer race of a small Timken roller bearing. Type of Steel AISI 8720 Case Depth 1.00 - 1.50 mm Hardness HRC 58 - 62 Surface Finish 0.51 - 0.76 mm Test Blocks Timken steel blocks, No. T-45349, 1.27 cm square and 1.9 cm long. Type of Steel AISI 4320 Case Depth 1.00 - 1.5
10、0 mm Hardness HRC 58 - 62 Surface Finish 0.51 - 0.76 mm Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same cond
11、itions unless otherwise specified. FORD LABORATORY TEST METHOD BJ 101-04 Page 3 of 4 Copyright 2001, Ford Global Technologies, Inc. Procedure 1. Wash Timken cup and block with one of the prescribed solvents and dry thoroughly. Avoid finger marking specimens. 2. Assemble cup on spindle of machine and
12、 block in specimen holder. 3. For greases, stir the whole grease sample with a spatula to intermix the oil and soap thoroughly. Weigh 0.30 to 0.35 grams of grease and spread uniformly on cup and test surface of block. 4. For dry film lubricants, use thickness of film as required for test. 5. Locate
13、specimen holder on load lever arm with the minimum disruption of the grease or dry film on the block or cup. 6. Start motor and run for 2 minutes for break-in with no weight load on test specimens. If a Falex loader is used, start applying load mechanism approximately a minute after the break-in was
14、 started. Use weight stated in Engineering Material Specification. 7. Run test for specified hours if no score has occurred. The total time includes the 2 minute break-in. For tests that have passed, measure width of wear scar on specimen block in millimeters under suitable microscope. Scan length o
15、f scar and report averaged width. If scoring occurs, discontinue testing and record the number of hours until scoring. Report as “failed; scored with “X“ hours“. 8. Run a minimum of three tests on the same test block when possible to check the repeatability of test time and amount of wear required i
16、n the Engineering Material Specification. (a) All three consecutive tests must pass the specification requirement. (b) If one of the three tests fail, run two additional tests for a total of five tests of which four must pass the specification requirement. (c) If two out of the first three tests fai
17、l, discontinue further tests. NOTE: If a block “scores“ (failure) during a test, the block can not be reused and should be replaced with a new one. 9. Report the following: (a) Hours passed or failed for each test made. (b) Average wear scar width in millimeters of each test that has passed. Chemica
18、ls, materials, parts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in its facilities. FORD LABORATORY TEST METHOD BJ 101-04 Page 4 of 4 Copyright 2001, Ford Global Technologies, Inc. MEASUREMENT OF FILM LIFE AND ANTI-WEAR PROPERTIES OF GREASES AND DRY FILM LUBRICANTS Diagram of Timken Machine
