ASTM_D_5620_-_94_1999.pdf

Designation:D 5620 94(Reapproved 1999)An American National StandardStandard Test Method forEvaluating Thin Film Fluid Lubricants in a Drain and DryMode Using a Pin and Vee Block Test Machine1This standard is issued under the fixed designation D 5620;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of the endur-ance(wear)life and load carrying capacity of thin film fluidlubricants that are intended to operate after a single applicationand after excess material has drained from the contact area ofsliding metal to metal surfaces,and which operates in whatfunctionally is a drain and dry mode with no additionallubricant being applied.1.2 The values stated in SI units are to be regarded as thestandard except where equipment is supplied using inch-poundunits which would then be regarded as the standard.The metricequivalents of the inch-pound units given in the body of thestandard may be approximate.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:B 16 Specification for Free-Cutting Brass Rod,Bar,andShapes used in Screw Machines2D 2625 Test Method for Endurance(Wear)Life and Load-Carrying Capacity of Solid Film Lubricants(Falex Pin andVee Method)3F 22 Test Method for Hydrophobic Surface Films by theWater Break Test42.2U.S.Military Specifications:5Mil-P-16232 Phosphate Coatings,Heavy,Manganese orZinc Base(for ferrous metals)TT-C-490 Cleaning Methods for Ferrous Surfaces and Pre-treatment for Organic Coatings3.Terminology3.1 Definitions:3.1.1 drain and dry mode,nthe effect from being sprayed,dipped,or brushed with a fluid lubricant and the excessmaterial draining from the surface leaving behind a thin filmthat remains wet and must act as a lubricant on its own,withoutbenefit of recirculation or continuous supply.3.1.2 Newtonian flow,na Newtonian liquid is one thatflows immediately on application of even the smallest force,and for which the rate of flow is directly proportional to theforce applied.3.1.3 non-Newtonian flow,na non-Newtonian liquid isone whose viscosity depends on the rate of shear.Some willnot flow until the force applied is greater than a definite valuecalled the yield point.3.1.4 thin film fluid lubricant,nfluid lubricants consistingof a primary liquid with or without additives of lubricatingpowders and without binders or adhesives,which form a filmon one or both surfaces to be lubricated and perform theirfunction after application and after excess material has drainedfrom the application area,and without additional materialbeing supplied by either a continuous or intermittent method.3.1.5 wear,ndamage to a solid surface,generally involv-ing progressive loss of material,due to the relative motionbetween that surface and a contacting substance or substances.3.2 Definitions of Terms Specific to This Standard:3.2.1 direct load,nthe load that is applied linearly,bisecting the angle of the vee block corrected to either the800-lbf(3550-N)gage reference or the 3000-lbf(13 300-N)gage reference.3.2.1.1 DiscussionThis load is equivalent to the true loadtimes the cos 42.3.2.2 endurance(wear)lifethe length of the test timebefore failure under a constant loaded condition,in minutes,inwhich the applied test lubricant performs its function.3.2.3 gage load,nthe value obtained from the gage whilerunning the test after being corrected to the standard curveusing the calibration procedure for the 4500-lbf(20 000-N)reference gage.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.L0.05 on Solid Lubricants.Current edition approved Oct.15,1994.Published December 1994.2Annual Book of ASTM Standards,Vol 02.01.3Annual Book of ASTM Standards,Vol 05.01.4Annual Book of ASTM Standards,Vol 10.05.5Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.3.2.4 load carrying capacitythe highest indicated loadsustained for a minimum of 1 min.4.Summary of Test Method4.1 Prior to both tests,the thin film lubricant test fluid isdeposited on the pin and vee blocks and allowed to drain for aminimum of 1 min and not to exceed 4 min unless deemednecessary by the user,such as under conditions where compo-nent evaporation is a consideration for the final data basedesired.4.2 The endurance(wear)life test(Proced