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)
TEST METHOD B
13. Determination of Actual Gage Load for Run-In and 250-lbf (1112-N) True Load Increments
13.1 The procedure, Section 14, requires a run-in at an actual gage load equivalent to 300-lbf (1334-N) true load (264-lbf direct load), and testing at incremental gage loadings equivalent to 250-lbf (1112-N) true load (224-lbf direct load) over the range from 500 to 4500-lbf (2224 to 20 000-N) true load (412 to 2885-lbf direct load). Determine the equivalent actual gage loads as prescribed in Section 8, and Test Method A. Record on a suitable reporting form, such as shown in Table 3.

14. Procedure
14.1 Run-In - Use the same procedure as prescribed in 12.1, Test Method A.

14.2 Test:
14.2.1 Re-engage the automatic loading ratchet and leave it engaged until the actual gage reading is equivalent to 500-lbf (2224-N) true load (412-lbf direct load), as determined in Section 13. Run for 1 min at this loading.

NOTE 11 - Maintain load at near constant at this load and at subsequent incremental loading by taking up the load by means of the ratchet wheel when necessary.

NOTE 12 - Keep the motor running after run-in and throughout subsequent loadings.

14.2.2 Increase actual gage loads in the increments equivalent to 250-lbf (1112-N) true load (224-lbf direct load), as determined in Section 13, running for 1 min at each increment loading. Record the load at which failure occurs (Note 14, Note 15). If no failure is obtained, record the last load run with a plus (+) sign after the value.

NOTE 13 - Failure is indicated by (a) breakage of shear pin or test pin, or (b) inability to increase or maintain load by means of the ratchet wheel.

NOTE 14 - If failure occurs during run-up between load increments, record the higher increment load as fail.

14.2.3 Determine and record the true load failure equivalent as described in 12.2.2.