1、MIL-PRF-83261C 07 January 2011 SUPERSEDING MIL-PRF-83261B (USAF) 13 February 1998 PERFORMANCE SPECIFICATION GREASE, AIRCRAFT, EXTREME PRESSURE, ANTI-WEAR AMSC N/A FSC 9150 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. METRIC Comments, suggestions, or questions on
2、this document should be addressed to AFPA/PTPT, 2430 C Street, Bldg 70, Area B, Wright-Patterson AFB OH 45433-7632 or e-mailed to AFPET.AFTTwpafb.af.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/a
3、ssist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83261C 2 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope2. APPLICABLE DOCUMENTS . This specification c
4、overs grease intended to lubricate aircraft accessories which operate at high speeds and under heavy loads in a temperature range of -73C to +232C. 2.1 General2.2. . The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documen
5、ts cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 o
6、f this specification, whether or not they are listed. Government documents2.2.1 . Specification and standardsFEDERAL SPECIFICATIONS . The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the
7、solicitation or contract. FED-STD-791 Testing Method of Lubricants, Liquid Fuels, and Related Products (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch/ 2.3 or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 191
8、11-5094) Non-government publicationsASTM, INTERNATIONAL . The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM D217 Cone Penetration of Lubricating Grease (
9、DoD Adopted) ASTM D1264 Determining the Water Washout Characteristics of Lubricating Greases (DoD Adopted) ASTM D1478 Low-Temperature Torque of Ball Bearing Grease (DoD Adopted) ASTM D1742 Oil Separation from Lubricating Grease During Storage (DoD Adopted) ASTM D2266 Wear Preventative Characteristic
10、s of Lubricating Grease (Four-Ball Method) (DoD Adopted) ASTM D2595 Evaporation Loss of Lubricating Greases Over Wide-Temperature Range (DoD Adopted) ASTM D2596 Measurement of Extreme-Pressure Properties of Lubricating Grease (Four-Ball Method) (DoD Adopted) ASTM D3336 Life of Lubricating Greases in
11、 Ball Bearings at Elevated Temperatures (DoD Adopted) ASTM D4057 Manual Sampling of Petroleum and Petroleum Products (DoD Adopted) (Copies of these documents are available online at http:/www.astm.org or the ASTM International, 100 Barr Harbor Drive, West Conshohocken PA 19428-2959) SOCIETY OF AUTOM
12、OTIVE ENGINEERS (SAE) SAE AMS 6447 Steel Bars, Forgings, and Tubing 1.4CR (0.98 1.10C) (SAE 52100) Electroslag Remelted (DoD Adopted) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83261C 3 SAE AMS 6491 Steel Bars, Forgings, and Tubing 4.1CR
13、 4.0MO 1.0V (0.80 0.85C) Premium Aircraft-Quality for Bearing Applications, Double Vacuum Melted (M-50) (DoD Adopted) (Copies of these documents are available online at http:/www.sae.org or SAE International, 400 Commonwealth Drive, Warrendale PA 15096-0001 USA) 2.3. Order of precedence. In the even
14、t of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQ
15、UIREMENTS 3.1 Toxicity3.2 . The materials shall have no adverse effect on the health of personnel when used for their intended purpose. First article3.3 . When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2. Materials3.4 . The grease shall be a mi
16、xture consisting of a base fluid, a gelling agent and the necessary additives. A formulation of a fluorinated polysiloxane fluid, a non-soap gelling agent, and the necessary additives is recommended but is not mandatory. Properties of finished fluid3.4.1 . The properties of the finished fluid shall
17、be in accordance with those listed in 3.4 and Table I. Un-worked penetration3.4.2 . The un-worked penetration (as measured in units of 0.1 mm) of the grease shall be a minimum of 280 when tested as specified in 4.4.3. Worked penetration3.4.3 . The worked penetration (as measured in units of 0.1 mm)
18、of the grease shall be a minimum of 270 and a maximum of 350 when tested as specified in 4.4.3. Workmanship4. VERIFICATION . The grease shall be a high quality, smooth, homogenous product free from abrasives and impurities when examined as specified in 4.4.2. 4.1 Classification of inspectionsa. Firs
19、t article inspection (see 4.2). . The inspection requirements specified herein are classified as follows: b. Quality conformance inspection (see 4.3). 4.2 First article inspection4.2.1 First article samples4.2.2 . When required, a first article inspection shall be performed on a 5 kg (12.5 pound) sa
20、mple from a bulk lot (see 6.3) to determine conformance with section 3. First article tests4.3 . First article sample(s) shall be subjected to all the tests specified in 4.4 and table II. Quality conformance inspection4.3.1 . Quality conformance inspections shall consist of sampling plans A and B. S
21、amples shall be labeled completely with information which identifies the purpose of the sample, name of the product, specification number, lot/batch number (see 6.3), date of sampling and contract number. Sampling plan A. A 5 kg (12.5 pound) sample from a bulk lot (see 6.3) shall be selected in acco
22、rdance with ASTM D4057 and subjected to inspection and tests specified in 4.4.1 and 4.4.2, and Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83261C 4 shall be subjected to inspections for penetration, evaporation, and steel-on-steel wear as
23、 specified in table II. If the packaged sample size is less than 0.2 kg (0.5 pound), all tests in sampling plan B (see 4.3.2) will also be run on the sample from the bulk lot. The inspection lot shall be rejected if the sample fails any of the tests. 4.3.2 Sampling plan B. A random sample of filled
24、unit containers shall be selected from each packaged lot (see 6.3) of fluid in accordance with the table III. This sample(s) shall be subjected to inspections for worked stability, oil separation, load carrying capacity, water resistance, low temperature torque, and high temperature performance, as
25、specified in table II. If any sample fails, the lot shall be rejected. TABLE I. Physical properties of grease CHARACTERISTIC PERFORMANCE LIMITS UNITS Penetration, Unworked 280, minimum 0.1 mm Penetration, Worked 270 350 0.1 mm Worked Stability, 100,000 Strokes Penetration 375, maximum 0.1 mm Evapora
26、tion 15.0, maximum percent Oil Separation 20.0, maximum percent Load Carrying Capacity 90, minimum kg Water Resistance 20, maximum percent Steel-on-Steel Wear, 52100 Steel 1.30 maximum mm Steel-on Steel Wear, M-50 Steel 1.30 maximum mm Storage Stability, Penetration Unworked 200, minimum 0.1 mm Stor
27、age Stability, Penetration Worked (Change from Original) 30, maximum 0.1 mm Low Temperature Torque Starting 5000, maximum g/cm Low Temperature Torque Running 1000, maximum g/cm High Temperature Performance Average 4 Tests 500, maximum hours Provided by IHSNot for ResaleNo reproduction or networking
28、permitted without license from IHS-,-,-MIL-PRF-83261C 5 4.4 Method of inspection4.4.1 . Inspection4.4.2 . Refer to the contract or purchase order for specific inspection requirements. Examination of the product4.4.3 . Sample grease (see 3.3) shall be inspected visually and a suitable portion shall b
29、e worked with a spatula on a glass surface. After working, the grease shall be spread with a straight edge and observed for uniformity as indicated by a smooth surface. Storage stabilityTABLE II. Test methods for grease . Penetration after the storage test shall be determined on a sample of grease (
30、see 3.2) which has been stored at a temperature of 38C 3C in a 0.5 kg (1 pound), oil-tight container for 6 months subsequent to the original determination of penetration. The unworked and worked penetration after storage shall be determined in accordance with ASTM D217. CHARACTERISTIC TEST METHOD TE
31、ST PARAGRAPH FED-STD-791 ASTM Penetration, Unworked D217 Penetration, Worked D217 Storage Stability 4.4.3 Worked Stability 313.3 Evaporation 1/D2595 Oil Separation 1/D1742 Load Carrying Capacity D2596 Water Resistance 2/D1264 Steel-on-Steel Wear, 52100 Steel 3/D2266 Steel-on-Steel Wear, M-50 Steel 4
32、/D2266 Low Temperature Torque 5/D1478 High Temperature Performance 1/D3336 Notes 1/The test temperature shall be 232C. 2/The test temperature shall be 38C 3C. 3/The test temperature for 52100 steel shall be 75C, in accordance with AMS 6447. 4/The test temperature for M-50 steel shall be 232C, in acc
33、ordance with AMS 6491. 5/The test temperature shall be -73C 3C. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83261C 6 TABLE III. Sample plan B LOT SIZE SAMPLE SIZE 1-4 All 5-50 5 51-90 7 91-150 11 151-280 13 281-500 16 501-12,000 19 (accep
34、tance number is zero, c = 0) 5. PACKAGING 5.1 Packaging6. NOTES . For acquisition purposes, the packaging requirements shall be as specified in the contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD or in-house contractor personnel, these personnel need to conta
35、ct the responsible packaging activity to ascertain packaging requirements. Packaging requirements are maintained by the Inventory Control Points packaging activities within the Military Service or Defense Agency, or within the military services system commands. Packaging data retrieval is available
36、from the managing Military Departments or Defense Agencys automated packaging files, CD-ROM products, or by contacting the responsible packaging activity (This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.) 6.1 Intended use6.2 Acquisition
37、requirements. Acquisition documents should specify the following: . The grease covered by the specification is intended for use in aircraft actuators, gears, gearboxes, anti-friction bearings, plain spherical bearings, miniature bearings, and other applications that involve heavy loads and sliding,
38、rolling, or oscillatory motions. It is particularly suitable for use over the temperature range of -73C to +232C. a. Title, number, and date of this specification. b. Quantity required. d. Packaging requirements (see 5.1). 6.3 Definitions. 6.3.1 Bulk lot. A bulk lot (batch) is an indefinite quantity
39、 of a homogenous mixture of material (3.2) offered for acceptance in a single, isolated container; or manufactured in a single plant run (not to exceed 24 hours), through the same processing equipment, with no change in ingredient material. 6.3.2 Packaged lot. A packaged lot is an indefinite number
40、of 55-gallon drums, or smaller unit Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-83261C 7 containers (such as one-gallon cans) of identical size and type, offered for acceptance and filled with a homogenous mixture of material from one iso
41、lated container; or filled with a homogeneous mixture of material manufactured in a single plant run (not to exceed 24 hours), through the same processing equipment, with no change in ingredient material. 6.4 Material Safety Data Sheets. Contracting officers will identify those activities that requi
42、re copies of completed Material Safety Data Sheets (MSDS) prepared in accordance with FED-STD-313. The pertinent Government mailing addresses for submission of data are listed in FED-STD-313. 6.5 Shelf-life. This specification covers items where the assignment of a Federal shelf-life code is a consi
43、deration. Specific shelf-life requirements should be specified in the contract or purchase order, and should include, as a minimum, shelf-life code, shelf-life package markings in accordance with MIL-STD-129 or FED-STD-123, preparation of a material quality storage standard for type II (extendible)
44、shelf-life items, and a minimum of 85 percent shelf-life remaining at the time of receipt by the Government. These and other requirements, if necessary, are in DoD 4140.27-M, Shelf-Life Management Manual. The shelf-life codes are the in Federal Logistics Information System Total Item Record. Additiv
45、e information for shelf-life management may be obtained from DoD 4140.27-M, or the designated shelf-life Points of Contact (POC). The POC should be contacted in the following order: (1) the Inventory Control Points that manage the item and (2) the DoD Service and Agency administrators for the DoD Sh
46、elf-Life Program. Appropriate POCs for the DoD Shelf-Life Program can be contacted through the DoD Shelf-Life Management website: https:/www.shelflife.hq.dla.mil/. 6.6 Subject term (keyword) listing. Evaporation Fluorinated Oil separation Polysiloxane fluid Worked stability 6.7 Changes from previous
47、 issue. Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extent of the changes. Custodians: Preparing activity: Air Force - 68 Air Force 68 DLA-GS (Project 9150-2011-001) Note: The activities listed above were interested in this docum
48、ent as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
