ASTM D2670 method for measuring wear properties of fluid lubricants
ASTM D2670 standard test method for measuring wear properties of fluid lubricants (Falex pin and Vee block method)
1. Scope
1.1 This test method covers a procedure for making a preliminary evaluation of the wear properties of fluid lubricants by means of the Falex Pin and Vee Block Lubricant Test Machine.

NOTE 1 - Certain fluid lubricants may require different test parameters depending upon their performance characteristics.

1.2 The values stated in either inch-pound units or SI (metric) units are to be regarded separately as standard. Within the text the SI units are shown in brackets. The values stated in each system are not exact equivalents, therefore each system must be used independently of the other. Combining values of the two systems may result in nonconformance with the specification.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

2. Referenced Documents
2.1 ASTM Standards:
B 16 Specification for Free-Cutting Brass Rod, Bar, and Shapes for Use in Screw Machines

3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 actual gage load, n - the value obtained from the gage while running the test and before any corrections are made.

3.1.1.1 Discussion - The gage reading is irrespective of the particular gage used, and corrections are made by comparison to a standard reference.

3.1.2 direct load, n - the load that is applied linearly, bisecting the angle of the vee block corrected to either the 800 lbf or 3000 lbf gage reference.

3.1.2.1 Discussion - This load is equivalent to the true load times the cos 42°.

3.1.3 true load, n - the sum of the applied forces normal to the tangents of contact between the faces of one vee block and the journal pin corrected to the 4500 lbf gage reference line.

3.1.4 wear teeth, n - a measurement of wear, which in this test, is based on the number of ratchet wheel teeth advanced during the test while maintaining load.

3.1.4.1 Discussion - The number of teeth is directly related to the total wear (inches).