1、- y MIL-L-17701B 71 M 7779706 0102738 7 MIL-L-19701 B 8 November 1983 SUPERSEDING 28 March 1969 MIL-L-l9701A(AS MILITARY SPECIFICATION LUBRICANT, ALL-WEATHER, SEMI-FLUID, FOR AIRCRAFT ORDNANCE, METRIC This specification is approved for use by all Departments and Agencies of the Department of Defense
2、. 1. SCOPE 1.1 Scope. This specification covers the requirements for a semi-fluid lubricant intended for the lubrication of aircraft machine guns and accessory equipment between -55C and 70C and under cold-sweat-cold cycling conditions. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifi
3、cations, standards, and handbooks. Unless otherwise specified, the following specifications, standards, and handbooks of the issue 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 e
4、xtent specified herein. SPECIFICATIONS FEDERAL PPP-C-96 - Can, Metal, 28 Gage and Lighter. MI LI TARY MIL-P-5516 - Packing, Preformed, Petroleum Hydraulic Fluid Resistant, 160 Degree Fahrenheit. STANDARDS FEDERAL FED-STD-313 - Material Safety Data Sheets Preparation and Sub- mission of Beneficial co
5、mments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Engineering Specifications and Standards Department (Code 931, Naval Air Engineering Center, Lakehurst, NJ 08733, by using the self-addressed Standardization D
6、ocument Improve- ment Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 9150 THIS DOCUMENT CBNTAINS PAGES. % m Licensed by Information Handling ServicesY MI LI TARY MI L-STD-105 d Sampling Procedures and Tables for Inspection by Attributes. MI L-STD-2 90 - Packaging of
7、Petroleum and Related Products. AIR FORCE - NAVY AERONAUTICAL AN 6227 - Packing, O-Ring Hydraulic. 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this specifi- cation to the extent specified herein. PU
8、BLICATIONS CODE OF FEDERAL REGULATIONS 49 CFR - Transportation - Hazardous Materials. (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Nashington, DC 20402.) (Copies of specif i cations, standards, handbooks, drawings, and pub1 i cations re-
9、 quired by manufacturers in connection with specific acquisition functions should be obtained from the cbntracting activity or as directed by the contracting officer.) The following documents form a part of this specifi- cation to the extent specified herein. The issues of the documents which are in
10、- dicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. 2.2 Other publications. AMERICAN SOC1 ETY FOR TESTING AND MATERIALS (ASTM) ASTM D 471 - Rubber Property - Effect of Liquids. ASTM D 942 - Oxidation Stability of Lubricating Greases by
11、the Oxygen Bomb Method. ASTM D 972 - Evaporation Loss of Lubricating Greases and Oils. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.1 AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ANSI 2129.1 - American Nationa
12、l Standard for the Precautionary Labeling of Hazardous Industrial Chemical s. (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, NY 10018.) (Industry association specifications and standards are generally available for reference from li
13、braries. They are also distributed among technical groups and usin Federal agencies. 1 2 Licensed by Information Handling ServicesMIL-L-19701 B 2.3 Order of precedence. specification and the references cited herein, the text of this specification shall take precedence. In the event of a conflict bet
14、ween the text of this 3. REQUIREMENTS 3.1 Qualification. The lubricant 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 4.3 and 6.3). 3.2 Composition. The lubricant shall be of an a
15、pproved composition consisting of components of a grade and quality which have been demonstrated under firing tests to be suitable for the purpose intended and which will formulate a semi- fluid lubricant that conforms to all of the requirements of this specification (see 6.5). 3.3 Physical properti
16、es. Physical properties of the lubricant shall be in accordance with Table I. 3.4 Material safety data sheets. Material safety data sheets shall be prepared and submitted in accordance with FED-STD-313. Material safety data sheets shall also be forwarded as specified in 4.3.2. The grease shall have
17、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 departmental medical service who will act as an advisor to the contracting agency (see 4.3.2 and 6.2.1.e). QUALITY ASSU
18、RANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspec- tion requirements as specified herein. tract or purchase order, the contractor may use his own or any other facilities su
19、itable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves 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
20、prescribed requirements: Except as otherwise specified in the con- 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. Qualification inspection (see 4.3). b. Quality conformance inspection (see 4.4). 4.3 Qualification inspection. Qualificatio
21、n inspection shall consist of a review of the test report (see 4.3.2) for approval, and by testing to determine that the qualification inspection sample (see 4.3.1). complies with all the require- ments for the physical properties specified in Table I when tested in accordance with the inspection me
22、thods specified in Table II and 4.6.4 through 4.6.10.2. 4.3.1 Qualification inspection sample. The qualification inspection sample shall consist of 5 kilograms of lubricant. The sample shall be forwarded to the 3 Licensed by Information Handling Services- _- _- - MIL-L-1970LB 71 W 4797406 01012741 7
23、 m MIL-L-197018 4.4.2.1 For examination of filled containers. A random sample of filled con- tainers, fully prepared for delivery, shall be selected from each lot of grease in accordance with MIL-STD-105, Inspection Level I with an Acceptable Qual i ty Level I (AQL) of 2.5 percent defective, Aircraf
24、t and Crew Systems Technology Directorate, Code 60612, Naval Air Development Center, Warminster, PA 18974. The sample shall be plainly identified by a secure- ly attached durable tag or label marked with the following information: Sample for qualification inspection. Name of manufacturer. Product co
25、de number. Batch number. Date of manufacture. Submitted by (name) (date) for qualification inspection in accordance with MIL-L-1970lB under authorization of (reference authorizing letter) (see 6.3). LUBRICANT, ALL WEATHER, SEMI-FLUID, FOR AIRCRAFT ORDNANCE, METRIC 4.3.2 Test reports. Two copies of t
26、he manufacturers test report, containing complete test data showing that the material submitted for qualification conforms to the requirements of this specification (see 4.3), shall be submitted with the qualification sample. Location and identity of the plant which produced the sample tested shall
27、also be supplied. Material safety data sheets on toxicity (see 3.4) shall be prepared in accordance with FED-STD-313 and submitted to the qualifying laboratory (see 4.3.1). In order to retain qualification of a pro- duct approved for l i sting on the Qualified Products List (QPL), the manufacturer s
28、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
29、o re-examine the qualified product whenever deemed necessary to determi ne that the product continues to meet any or all of the specification requirements. 4.3.3 Retention of qualification. O 4.4 Quality conformance inspection. .The quality conformance inspection of the lubricant shall consist of te
30、sts of samples from 4.4.2.2 in accordance with Table III and an examination of samples from 4.4.2.1 for conformance with 4.6.2. Samples shall be labeled completely with information identifying the purpose of the sample, name of product, Specification number, lot and batch number, date of sampling, a
31、nd contract number. 4.4.1 Lot information, A lot shall consist of all the lubricant produced by one manufacturer, at one plant, from the same materials and under essentially the same conditions, provided the operation is continuous and does not exceed a 24 hour period. In the event the process is a
32、batch operation, each batch shall constitute a lot (see 6.4). 4 I Licensed by Information Handling ServicesMIL-L-ll70LB 9ll 9999906 OL027q2 O MIL-L-19701B 4.4.2.2 For tests. The sample for tests shall consist of 1.5 kilogram sample of lubricant taken at random from filled containers from each lot of
33、 lubricant. The lot shall be unacceptable if the sample fails to comply with any of the require- ments for the tests specified in Table III. 4.5 Test conditions. Test conditions shall be in accordance with 4.6 and the physical values specified in Table I apply to the coverage of determinations made
34、on the sample. 4.6 Methods of examinations and tests. 4.6.1 Composition. The composition of the lubricant shall be certified by the manufacturer at the time of delivery. 4.6.2 Examinations. Each of the fil led containers, selected in accordance with 4.4.2.1, shall be examined for defects of the cont
35、ainer and closure, for evidence of leakage and for unsatisfactory markings to determine conformance with 5.1, 5.1.1 and 5.1.2. Each sample container shall also be weighed to determine the amount of contents. If the number of defective containers exceeds the accep- tance number of the sampling plan s
36、pecified-in 4.4.2.1, the lot shall be rejected. 4.6.3 Tests. Tests shall be performed in accordance with the applicable ASTM test methodcsted in Table II and 4.6.4 through 4.6.10.2 to determine conformance with the requirements specified in 3.3. Brookfield Model LVF or LVT viscometer under the follo
37、wing conditions. The immersed portion of the rotating spindle shall be a cylinder 31 mm long and 3.2 mm in diameter (number 4 spindle immersed to center of immersion groove). The lubri- cant shall be contained in a beaker or cylinder not less than 30 mm in diameter to a depth of not less than 45 mm.
38、 All measurements shall be made with the rotor guard removed from the instrument, and apparent viscosity shall be computed wi tkout the application of the correction factors normally applied when the instrument is used with a guard. Lubricant samples shall be stirred to ensure uniformity but shall n
39、ot be worked (except as required for worked stability and after storage) (see Table I). The temperature of the lubricant shall be checked before measure- ments by immersing a thermocouple or thermometer in the lubricant to ensure that the temperature is at 25 2 0.5“C or -55 2 1C. viscosity at -55“C,
40、 the sample shall be held undisturbed at -55“C, with the spindle immersed, for two hours before beginning measurements. The instrument shall be used with an extension shaft if necessary, so that the instrument proper remains outside the cold chamber. for at least one minute, after which readings sha
41、ll be made at 60, 30, 12 and 6 rpm followed immediately by a series of 6, 12, 30 and 60 rpm. The spindle shall be allowed to rotate at each speed until a constant reading is obtained. readings at the same speed should not differ by more than TO percent. The value of apparent viscosity reported shall
42、 be that computed from the average of the two readings at 12 rpm. The apparent viscosity of a portion of the lubricant sample shall be determined at 25 5 0.5“C in accordance with 4.6.4. shall then be worked an amount equivalent to ten passes through a 100-mesh screen in the Naval Research Laboratory
43、 (NRL) microworker (see 6.6). 4.6.4 Apparent viscosity. The apparent viscosity shall be measured with a When measuring the apparent The spindle shall be rotated in the lubricant at 60 rpm Pairs of 4.6.5 Worked stability. This portion The apparent viscos- 5 Licensed by Information Handling Servicesit
44、y of the worked lubricant shall be determined, again at 25 2 0.5OC in accordance with 4.6.4, and the change in apparent viscosity calculated. e 4.6.6 Storage stability. 4.6.6.1 After 7 days (168 hours). A well mixed sample of the lubricant shall The sample shall be held at 50 5 1C for 168 hours be p
45、laced in an oil sample bottle or other glass container 30 to 50 mm in diameter to a depth of 100 above the 100 r. 3.0 mm level. and then examined for the presence of a separated oil layer (see Table I). 3 mm. No lubricant shall be on the walls of the container 4.6.6.2 After one year. The sample of t
46、he lubricant shall be stored at 25 4 2“C, for a period of one year and then examined for evidence of oil separation. Suffi- cient sample shall be utilized so that the lubricant can be tested after the stor- age period for compl lance with the worked stabi 1 i ty and evaporation requirements (see Tab
47、le I). 4.6.7 Rust prevention. Steel panels, SAE 1010 or 1020, 76 mm x 152 mm x 0.8 mm, shall be prepared as follows: atives, etc., (b) wash with hot water and detergent, (cl rinse thoroughly with hot water, (d) rinse with acetone, (e) polish with clean, grade 1 emery paper, (f) rinse with hot tap wa
48、ter followed by distilled water, and (g) allow to dry. lubricant shall immediately be applied with a glass rod, worked into the surface, and the excess struck off with the rod spaced 0.127 mm above the surface (two layers of cellophane tape) to leave an even film of the lubricant of approximately th
49、is thickness. The panel shall be placed with one end elevated so that the panel is inclined 15 degrees from the horizontal. A glass buret tip or other small glass tube shall be mounted verticaly above the panel with the end of the tube 0.8 to 1.6 mm above the lubricant film. The tube shall be located equidistant from the sides of the panel and 25 to 50 mm from the upper end. A one percent solution of pure sodium chloride in distilled water shall be allowed to run from the tube onto the lubricant film at 3 2 0.2 ml/minute. Constant flow rate can be achieved by siphoning the solutio
