1、MIL-G-BL827A 73 H 777770b 0330522 4 H- 08-63 MIL-G-81827A - MIL-G-81827(AS) 9 June 1971- P4 January 1983 MILITARY SPECIFICATION GREASE, AIRCRAFT, HIGH LOAD CAPACITY, WIDE TEMPERATURE RANGE This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1
2、.1 SCOPE This specification covers the requirements for one grade of grease for use as a lubricant on heavily loaded sliding steel surfaces. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards and handbooks. Unless otherwise specified, the following specifications, stan
3、dards and handbooks listed in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL Qu-C-465 - Copper-Al umi num Al 1 oys (Al umi num Bronze) (Coppe
4、r Alloy Numbers 606, 614, 630 and ,642) , Rod, Flat Products with Finished Edges, (Flat Wire, Strip and Bar) , Shapes and Forgings MILITARY -7866 - Molydenum Disulfide, Technical , Lubricant Grade. MIL-G-23549 - Grease , General Purpose. Beneficial comments (recommendations, additions, deletions) an
5、d any pertinent data which may be of use in improving this document should be addressed to: Engineering Specifications and Standards Department (Code 93), Naval Air Engineering Center, Lakehurst, New Jersey 08733, by using the self-addressed Standardization Document Improvement Proposal (DD Form 142
6、6) appearing at the end of the document or by letter. FSC 9150 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STANDARDS FEDERAL FED-STD-313 FED-STD-791 MILITARY MIL-STD-105 MIL-STD-290 (Copies of spec - Material Safety Data Sheets Preparation and -
7、Lubricants, Liquid Fuels and Related Products, Submission of. Methods of Testing. - Sampling Procedures and Tables for Inspection Attributes. Packaging of Petroleum and Related Products. ifications, standards, handbooks, drawings and pubTicat ions required by manufacturers in connection with specifi
8、c acquisition functions should be obtained from the contracting activity or as directed by the contracting officer. ) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. The issues of the documents in the current which are indicated as Do
9、D adopted shall be the issue listed DoDISS and the supplement thereto, if applicable. NERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM D 217 ASTEY1 D 235 ASTM D 270 ASTM D 740 ASTM D 942 ASTM D 1264 ASTM D 1478 ASTM D 1743 ASTM D 2265 ASTM D 2595 ASTM D 2596 ASTM D 271 4 ASTM D 3336 ASTM D 4048
10、 Cone Penetration of Lubricating Grease. Petroleum Spirits (Mineral Spirits). Sampling Petroleum and Petroleum Products. Methyl Ethyl Ketone. Oxidation Stability of Lubricating Greases by the Oxygen Bomb Method. Water Washout Characteristics of Lubricating Greases. Low-Temperature Torque of Bal 1 Be
11、ari ng Greases. Corrosion Preventive Properties of Lubricating Greases. Dropping Point of Lubricating Grease Over Wide Temperature Range. Evaporation Loss of Lubricating Greases Over Wide Temperature Range. Measurement of Extreme-Pressure Properties of Lubricating Grease (Four-Bal 1 Method). Calibra
12、tion and Operation of the Alpha Model LFW-1 Friction and Wear Testing Machine. Performance Characteristics of Lubricating Greases in Ball Bearings at Elevated Temperatures. Detection of Copper Corrosion from Lubricating Grease by the Copper Strip Tarnish Test. (Application for copies should be addre
13、ssed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Industry association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and using Federal agencies.) 2 Provided by IHSN
14、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-BL827A 71 m 7777706 OLL052q 8 - MIL-G-81827A 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this specification shall take p
15、recedence. 3. REQUIREMENTS 3.1 Qualification. The grease furnished under this specification shall be products which are qualified for listing on the applicable Qualified Products List at the time set for opening of bids (see 4.4 and 6.3). 3.2 First article. When specified (see 6.2.1), a sample shall
16、 be subjected to first article inspection (see 4.5 and 6.6). 3.3 Material. The grease shall consist essentially of a suitable liquid lubricant, a gelling agent and molybdenum disulfide. The molybdenum disulfide shall be a powder in the 4 - 10 micron particle size range and of a purity and grade suit
17、able for general lubricating use. Use of improved fluids such as synthetic hydrocarbons may be required as base oi 1 constituents to meet th requirements of this specification. 3.4 Physical properties. Physical properties of the grease shall be in accordance with table I. 3.5 Toxicity. The grease sh
18、all have no adverse effect on the health of personnel when used for its intended purpose. Questions pertinent to this effect shall be referred by the contracting activity to the appropriate depart- mental medical service who will act as an advisor to the contracting agency. 3.6 Workmanship. The grea
19、se, when examined visually, shall be a smooth and homogeneous mixture, free from lumps and extraneous materials. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all i
20、nspection requirements as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reser
21、ves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Classification of inspection. The inspection requirements specified herein are classified as follows: a.
22、qualification inspection (see 4.4). b. First article inspection (see 4.5). c. Quality conformance inspection (see 4.6). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.3 Inspection conditions. 4.3.1 Test conditions. Test conditions shall be in acco
23、rdance with 4.7 and the physical values specified in table I apply to the average of determinations made on the sample. Unless otherwise specified, all tests shall be conducted on unworked grease. 4.4 Qualification inspection. Qualification inspection shall consist of a review of the test report (se
24、e 4.4.2) to determine that the qualification inspection sample (see 4.4.1) complies with all the requirements for the physical properties specified in table I when tested in accordance with the inspection methods specified in table II. In order to determine the suitability of the grease for specific
25、 service applications, the qualifying activity also rserves the right to conduct wheel bearing or actuator or compatibility tests. 4.4.1 Qualification inspction sample. The qualification inspection sample shall consist of 10 pounds of grease. The sample shall be forwarded to the Aircraft and Crew Sy
26、stems Technology Directorate, Code 60612, Naval Air Development Center, Warminster, PA 18974. The sample shall be plainly identified by a securely attached durable tag or label marked with the following information: Sample for qualification inspection. GREASE, AIRCRAFT, HIGH LOAD CAPACITY, WIDE TEMP
27、ERATURE RANGE Name of manufacturer. Product code number. Batch number. Date of manufacture. Submitted by (name) (date) for qualification inspection in accordance with MIL-G-81827A under authorization of (reference authori zing 1 etter) (see 6.3). 4.4.2 Test reports. Two copies of the manufacturers t
28、est report, containing complete test data showing that materi al submitted for qualification conforms to the requirements of this specification, shall be submitted with the qualification sample. Location and identity of the plant which produced the sample tested shall also be supplied. Material safe
29、ty data sheets on toxicity shall be prepared and submitted to the qualifying laboratory (see 4.4.1) in accordance with FED-STD-313 (see 3.5). 4.4.3 Retention of qualification . In order to retain qualification of a product approved for listing on the Qualified Products List (QPL), the manufacturer s
30、hall verify by certification to the qualifying activity, that the manufacturers product complies with the requirements of this specification. The time of periodic verification by certification shall be in two-year intervals from the date of original qualification. The Government reserves the right t
31、o re-examine the qual if ied product whenever deemed necessary to determine that the product continues to meet any or all of the specification requirements. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-G-BLB27A 91 7777706 0330526 L MIL-G-81827
32、A 4.6 Quality conformance inspection. The quality conformance inspection of the grease shall consist of tests of samples from 4.6.2.2 in accordance with table III and an examination of samples from 4.6.2.1 for conformance with 4.7.1. Samples shall be labeled completely with the information identifyi
33、ng the purpose of the sample, name of product, specification number, lot and batch number, date of sampling and contract number. 4.6.1 Lot formation. A lot shall consist of all the grease produced by one manufacturer, at one plant, from the same materials and under essentially the same conditions, p
34、rovided the operation is continuous and does not exceed a 24 hour period. In the event the process is a batch operation, each batch shall constitute a lot (see 6.7). 4.6.2 SamPlina. 4.6.2.1 For examination of filled containers. A random sample of filled containers, fully prepared for delivery, shall
35、 be selected from each lot of grease in accordance with MIL-STD-105, inspection level I with an acceptable quality level (AQL) of 2.5 percent defective. 4.6.2.2 For tests. The sample for tests shall consist of two five-pound samples of grease taken at random from filled containers from each lot of g
36、rease. For users who obtain grease in 1 arge containers, two f ive-pound samples shall be taken in accordance with ASTM D 270. One sample shall be tested for all the tests specified in 4.7.2; the other sample shall be retained. If a test result does not comply with the requirements of any of the tes
37、ts specified in 4.7.2, the test in question shall be repeated using the retained sample. The lot shall be unacceptable if the average of both test results fails to comply with any of the tests specified in 4.7.2. 4.7 Methods of examinations and tests. 4.7.1 Examinations. Each of the filled container
38、s, selected in accordance with 4.6.2.1, shall be examined for defects of the container and closure, for evidence of leakage and for unsatisfactory markings to determine conformance with 5.1. Each sample container shall also be weighed to determine the amount of contents. If the number of defective c
39、ontainers exceeds the acceptance number of the sampling plan specified in 4.6.2.1, the lot shall be rejected. 4.702 Tests. Tests shall be performed in accordance with table 11 and 4-7.3 through 4.7.3.7 to determine conformance with the requirements specified in 3.4. 5 Provided by IHSNot for ResaleNo
40、 reproduction or networking permitted without license from IHS-,-,-I 4.7.3 Oscillation - friction and wear test. 4.7.3.1 Apparatus. The apparatus used consists of the following: a. Falex model number 1 ring and block test machine, or equivalent, equipped with an osci 1 latory drive mechanism, load c
41、e1 1 transducer and a transducer amplifier/indicator (see 6.5). b. Measuring magnifier glass, with metric or English Unit calibration with a precision of 0.05 mm (0.002 in.), Or equi val ent. c. Analytical balance, capable of weighing to the nearest 0.1 mg. 4.7.3.2 Test ring. The test ring shall be
42、made of SAE 4620 steel having a Rackwell hardness of C58 to C63. The ring shall have a ground face 8.15 + 0.127 mm (0.321 + 0.005 in.) wide and diameter of 35, +0.0025, -0.0127 mm- (l. 3775, +0.0001; -0.0005 in. ) having an eccentricity between the inner and outer surface no greater than 0.038 mm (0
43、.0015 in.). The surface finish range of the outside diameter surface of the ring shall be 0.102 to 0.381 micro r11 rms (5 to 15 micro in. rms) in the direction of the motion. 4,7.3.3 Test block. The test block shall be made of copper alloy conforming to QQ-C-465, alloy 642 with the test surface 6.35
44、, +0.012, -0.000 mm (0.250, +0.0005, -0.0000 in.) wide and 15.7 + 0.127 mm (0.620 + 0.005 in.) long. The height of the test block shall be-10.16 + 0.051 mm T0.400 + 0.002 in. ). The Rockwel f hardness shall be B88 + 3. EacE block shall havea test surface polished to a surface finish of 0.702 to 0.20
45、3 micro m rms (4 to 8 micro in. rms) , being perfectly square W th al 1 outside edges. 4.7.3.4 Reagents. The reagents used are: a. Heptane ACS grade b. Methyl ethyl ketone conforming to ASTM D 740. c. Petroleum spirits conforming to ASTM D 235. 4.7.3.5 Calibration of apparatus. The apparatus shall b
46、e calibrated in accordance with ASTM D 2714. . 4,7.3.6 Preparation of apparatus. Before each test, thoroughly clean the specimen holder, threaded section, locknut and lockwasher. Use heptane as the cleaning agent and rinse with methyl ethyl ketone. Clean a new test ring and block for each test using
47、 the following procedure: a. Immerse in petroleum spirits and scrub with lint-free cloth. b. Rinse in a second bath of petroleum spirits. c. Suspend in the vapor of boi ling heptane for 30 seconds. d. Immerse in boiling methyl ethyl ketone for 30 seconds. 6 Provided by IHSNot for ResaleNo reproducti
48、on or networking permitted without license from IHS-,-,-MIL-G-BLBZ7A 91 m 9999906 OLL0528 5 m MIL-G-81827A e. Allow part to drip dry. f. When part has dried, suspend it in vapor of boi 1 ing heptane for 30 seconds. g. Allow part to air dry. h. Weigh each test ring and block to the nearest 0.1 mg. i.
49、 Store specimens in desiccator until ready to use. Lubricate the quarter segment of the specimen holder and the threaded section with grease conforming to MIL-G-23549. Apply the grease to be tested to the test ring surface, making sure that the entire wear surface is completely covered with test grease. Mount the test block in the quarter segment (clean lint-free cotton gloves should be used in handling the specimens) and position both in the specimen holder
