ASTM D5001 Standard Test Method for Measurement of Lubricity of Aviation Turbine Fuels by the Ball-on-Cylinder Lubricity Evaluator (BOCLE)
1. Scope
1.1 This test method covers assessment of the wear aspects of the boundary lubrication properties of aviation turbine fuels on rubbing steel surfaces.
1.1.1 This test method incorporates two procedures, one using a semi-automated instrument and the second a fully automated instrument. Either of the two instruments may be used to carry out the test.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address the safety concerns, ifany, associated with its use. It is the responsibility ofthe user ofthis 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:
D4306 Practice for Aviation Fuel Sample Containers for Tests Affected by Trace Contamination
D6708 Practice for Statistical Assessment and Improvement of Expected Agreement Between Two Test Methods that Purport to Measure the Same Property of a Material
2.2 Military Specification:
MIL-I-25017 Inhibitor, Corrosion/Lubricity Improver, Fuel Soluble
2.3 American Iron and Steel Institute Standard:
AISI E-52100 Chromium Alloy Steel
2.4 American National Standards Institute Standard:
ANSI B3.12 Metal Balls
2.5 Society ofAutomotive Engineers Standard:
SAE 8720 Steel
3. Terminology
3.1 Definitions:
3.1.1 lubricity - qualitative term describing the ability of a fluid to minimize friction between, and damage to, surfaces in relative motion under load.
3.1.1.1 Discussion - In this test method, the lubricity of a fluid is defined in terms of a wear scar, in millimeters, produced on a loaded stationary ball from contact with a fluid-wetted rotating cylindrical test ring operating under closely defined and controlled conditions.
3.1.2 wear scar - in the liquid fuels industry, average diameter of a worn and abraded area, measured in two specified directions, produced on a test ball under defined conditions.
3.1.2.1 Discussion - The wear scar generated by Test Method D5001 is often referred to as the BOCLE wear scar.
3.2 Abbreviations:
3.2.1 BOCLE - Ball On Cylinder Lubricity Evaluator
3.2.2 HRC - Rockwell Hardness "C" scale.
3.2.3 WSD - Wear Scar Diameter
