ASTM D3233 for Measurement of Extreme Pressure Properties of Fluid Lubricants
ASTM D3233 Standard Test Methods for Measurement of Extreme Pressure Properties of Fluid Lubricants (Falex Pin and Vee Block Methods)
1. Scope
1.1 These test methods cover two procedures for making a preliminary evaluation of the load-carrying properties of fluid lubricants by means of the Falex Pin and Vee Block Test Machine.
NOTE 1 - Additional information can be found in Appendix X1 regarding coefficient of friction, load gage conversions, and load gage calibration curve.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
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/B 16M Specification for Free-Cutting Brass Rod, Bar and Shapes for Use in Screw Machines
D2670 Test Method for Measuring Wear Properties of Fluid Lubricants (Falex Pin and Vee Block Method)
D2783 Test Method for Measurement of Extreme-Pressure Properties of Lubricating Fluids (Four-Ball Method)
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 - This 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 - that which is applied linearly, bisecting the angle of the vee block corrected to either the 800 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 true load failure value, n - the true load at which the lubricant tested can no longer support the applied load resulting in either test pin or shear pin breakage, or inability to maintain or increase load.
3.1.4.1 Discussion - This value is also referred to as the limit of extreme pressure.
