1、DOD-G-2450BA 71 7777906 0104613 T W D6D- Methods of testing. MILITARY MIL-STD-290 - Packaging, Packing, and Marking of Petroleum and Related Products. MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. in connection wi$h specific procurement functions should be obtained from
2、the procgring activity or as directed by the contracting officer.) (Copies of specifications standards, drawings, and publications required by cqntractors Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addre
3、ssed to: Washington, DC 20362 by using the self-addressed Standardization Document Commander, Naval Ship Engineering Center, SEC 6124, Department of the Navy, by letter. Improvement Proposal (DD Form 1426) appearing at the end of this document or “ F FSC 9150 THIS DOCUMENT CONTAINS f 7 PAGES. “- Pro
4、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-G-24508A(NAVY) 2.2 Other ublications. The following documents form a part of this specification to the extent speci!ied herein. Unless otherwise indicated, the issue in effect on date of invitation for
5、 bids or request for proposal shall apply. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 211 - Cone Penetration of Lubricating Grease, Test for. D 235 - Petroleum Spirits (Mineral Spirits). D 140 - Methyl Ethyl Ketone. D 942 - Oxidation Stability of Lubricating Greases by the Oxygen Bomb Metho
6、d, Test D 1264 - Water Washout Characteristics of Lubricating Greases, Test for. D 1478 - Low-Temperature Torque of Ball Bearing Greases, Test for. D 1743 - Rust Preventive Properties of Lubricating Greases, Test fdr. D 2265 - Dropping Point of Lubricating Grease of Wide Temperature Range, Test for.
7、 D 2266 - Wear Preventive Characteristics of Lubricating Greases (Four-Ball Method). D 2595 - Evaporation Loss of Lubricating Greases Over Wide-Temperature Range. D 2596 - Extreme Pressure Properties of Lubricating Grease (Four-Ball Method), D 2714 - Calibration and Operation of the Alpha Model LFW-
8、1 Friction and Wear for. Measurement of. Testing Machine. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pennsylvania 19103.) available for reference from libraries. They are also distributed among technical groups and u
9、sing Federal agencies.) (Technical society.and technical association specifications and standards are generally 3. REQUIREMENTS 3.1 Qualification. Grease furnished under this specsfication shall be products which are qualified for listing on the applicable qualified products list at the time set for
10、 open- ing of bids (see 4.3 and 6.3). 3.2 Material. The grease shall consist essentially of-a wide temperature range liquid lubricant and suitable gelling agent. The grease shall not be comprised of silicones nor contain silicone additives. 3.3 Composition. The composition of the grease shall be pro
11、vided by the manufacturer to the Naval Ship Engineering Center at the time of ualification. Material purchased under contract shall be the same , within normal manufacturqng tolerances , as that given qualifi- cation appraval . perfume, or free alcohol. (450F) when deteLined as specified in 4.5.1. s
12、pecified m.- not less than 265 nor more than 320. 3.4 Odor. The grease shall not have an objectionable odor, or odor of rancidity, 3.5 Droppin W. The dropping point of the grease shall be not less than 232OC 3.6 Worked enetration. The worked penetration of the grease, when determined as show no gree
13、n color, pitting or etching on copper, nor shall a dark brown or black stain remain on the copper strip after washing with N-hexane. A slight brown stain will not be cause for failure. 3.7 Corrosiveness (copper strip). The grease, when tested as specified in 4.5.1, shall other foreignparticles excee
14、ding the following limite: 3.8 Dirt. The grease, when tested as specified in 4.5.1, shall not contain dirt or (a) 1,000 papticles per cubic centimeter (cm ) of grease for particles 25 .miCr- (b) None of, particles 75 um or larger. 3 meters ;(Mm) or larger. 3.9 Oxidation stabiaity. Whew-tested in.iIc
15、cordance with 4.5.1, the grease shall not cause a pressure drop exceeding 172 kilopascals (kPa) (25 pounds per square inch (lb/in ) in 500 hours on qualification test or more than 103 kPa (15 lb/in2) in 100 hours on inspection tests. 2 2 Provided by IHSNot for ResaleNo reproduction or networking per
16、mitted without license from IHS-,-,-the bearing- 3.10 Water DOD-G-24508A (NAVY) resistance. Not more than 10 percent of the grease tested as specified in 4.5.1 at 38C (100OF). shall be washed from average dia= Escars on the three steel balls shall not exceed 1.30 millimeters (mm). 3.11 Steel on stee
17、l wear. When the grease is tested in accordance with 4.5.1, the accordance with 4.5.1 shall be not more than 350 after 100,000 double strokes. 3.12 Penetration after prolonged working. The penetration of the grease tested in in 30 hurswhen tested at 177C 2 3C (350OF 5 5F) as specified in 4.5.1. 3.13
18、 Oil separation. The grease shall separate not more than 10 percent of its weight less than 30 mil1:imeter scar diameter when tested as specified in 4.5.1. 3.14 Load csrrying capacity. The load carrying capacity of the grease shall be not than 12 percent of its weight after 22 hours at 177OC 2 3OC (
19、350F 2 5F). 3.15 Evaporation. When tested as specified in 4.5.1, the grease shall not lose more or during storage awaiting completion of the other qualification tests. It shall possess a smooth unctuous consistency without lumps, crusts, or granular particles. 3.16 Homogeneity. The grease shall be c
20、ompletely homogeneous at the time of inspection 0.441 newtoxe- a running torque exceeding 0.147 Nm at -29C (-20OF) when tested as specified in 4.5.1. give a maxiibzaring rati:g Ef two. 3.17 Low tem erature torque. The grease shall not cause a starting torque exceeding 3.18 Rust reventive ro erties.
21、The grease, when tested as specified in 4.5.1, shall 3.19 Performance life. The grease shall lubricate a size 315 radial ball bearing satisfactorlly for at least 7000 hours at 104C (200F) when tested as specified in 4.5.2.1. in 4.5.2.2, shall show performance equivalent to Navy Reference Grease Z-1
22、+ 5 percent when judged by the criteria given in 4.5.2.2.4.2. 3.20 Bearing temperature rise and grease leakage. The grease, when tested as specified ture of 38Od 7+5“F), the undisturbed penetration shall be not less than 200 and 3.21 Stora e stabilit . After the grease has been stored for six months
23、 at a tempera- the worked pefietration shail not have changed from the original worked penetration by more than 30 points. The grease shall show no formation of crystalline material when stored for a total of one year at a temperature of 38C 2 3C (100F 2 5OF). Both tests shall be conducted as specif
24、ied in 4.5.3. the L type synthetGbber (see 6.5) is immersed in grease for seven days as specified in 3.22 Rubber swell. The average rubber swell volume shall not exceed 10 percent when 4.5.1. 3.23 High temperature performance. The grease, when tested as specified in 4.5.1, shall satisfactorlly lubri
25、cate ball bearings for 400 hours at 177C 2 3C (350F 5 5F). The average of four tests shall be 400 hours minimum. than 2.5 mg per thousand cycles under a 2-1/2 kg (5-pound) load nor more than 3.5 mg per thousand cycles under a 5 kg (10-pound) load when tested as specified in 4.5.1. 3.24 Gear wear. Th
26、e grease coated brass gear of a helical gear set shall not wear more 3.25 Oscillation tests. shall perform satisfactorimor 35,000 cycles. 3.25.1 Friction and wear testing machine. The grease when tested as specified in 4.5.1 3.25.2 Friction oxidation tester. The grease when tested as specified in 4.
27、5.4 shall perform satisfactorily for 200 hours. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-WD-G-Z4508A(NAVY) 4. QUALITY ASSURANCE PROVISIONS 4.1 Res onsibilit for ins ection. Unless otherwise specified in the contract, the contractor isPrespon
28、sibIe%r th: performance of all inspection requirements as specified herein. Except as otherwise specified in the contract, 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 Go
29、vernment 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 prescribed requirements. classified as follows: 4.2 Classification of inspections. The inspection (a) Qualification insp
30、ection (see 4.3). (b) Quality conformance inspection (see 4.4). requirements specified herein are I 4.3 Qualification tests. Qualification tests shall be conducted at a laboratory satisfactory to the Naval Ship Engineering Center. Qualification tests shall consist of the tests specified in 4.5. Appl
31、ication for qualification tests shall be made in accordance with “Provisions Governing Qualification SD-6” (see 6.3 and 6.3.1). 4.4 Quality conformance inspection. 4.4.1 E. For purposes of sampling, a lot shall consist of all grease manufactured as one batch. 4.4.2 Examination of filled containers.
32、A sample of filled containers selected from each lot in accordance wTth“STD-105 at inspection level I and acceptable quality level (AQL) of 2.5 percent defective shall be examined to verify compliance with all stipulations of this specification regarding fill, closure, marking, andcother requirement
33、s not involving tests. Containers shall be examined for defects of the container and the closure, for evidence of leakage, and for unsatisfactory markings; each sample filled container shall also be weighed to determine the amount of the contents. Any container in the sample having one or more defec
34、ts, or under required fill shall cause rejection of the container, and if the number of defective containers in any sample exceeds the acceptance number for the appro- priate sampling plan of MIL-STD-105, this shall cause rejection of the lot represented by the sample, 4.4.3 From each lot, container
35、s shall be selected as follows, and sealed, marked, and forwarded to a testing laboratory satisfactory to the command or agency concerned: (a) If grease is furnished in 250 g (one-half pound) or 500 g (one-pound) containers, enough containers to form two separate specimens of 2-1/2 kg (five pounds)
36、each shall be furnished. be furnished, (b) If grease is furnished in 2-1/2 kg (5-pound) containers two containers shall One of the two 2-1/2 kg (5-pound) sample specimens shall be subjected to the tests specified in 4.5.1 except those for 500 hours oxidation stability, high temperature performance,
37、rust preventive properties, rubber swell, storage stability, gear wear, and oscillation. The other 2-1/2 kg (!+pound) sample specimen shall be retained by the manufacturer for verifi- cation testing, if required, at a later date. or order and thereafterat such intea Gy be considered necessary by the
38、 Naval Ship Engineering Center to verify the consistency of production quality, one 2-1/2 kg (5-pound) sample and two 500 g (1-pound) samples of grease shall be forwarded to a laboratory satis- factory to the command or agency concerned. These samples shall be subjected to any of the tests specified
39、 in 4.5 deemed necessary by the command or agency concerned to determine that the sample conforms with that given qualification. 4.4.4 Samplinq for production check tests. From the first lot produced on a contract 4.5 Test procedures. 4.5.1 The following tests shall be performed in accordance with t
40、he applicable methods of FED-STD-791, ASTM standards on petroleum and lubricants, or applicable test paragraphs as shown in table I. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-G-24508A 71 7777706 0104bL7 7 TABLE I. Test mel Test Dropping p
41、oint Penetration, worked Corrosiveness (copper strip) Oxidation stability, 100 and 500 Water resistance Evaporation/ oil separationy Load carrying capacity Low temperature torque Steel on steel wear Penetra.tion after prolonged Dirt Rust preventive properties High temperature perform- Rubber swell G
42、ear wear Oscillation (Friction Storage stability (see 4.5.3) hours- 1/ working ance- 3/ oxidation and tester) FED-STD-791 5309 321 30 O5 3603 333 335 6 516 ASTM /When tested in accordance with ASTM D 942, the grease shall not cause a pressure drop exceeding 172 kPa (25 lb/in ) in 500 hours on qualif
43、ication tests or more than 103 kPa (15 lb/in ) in 100 hours on inspection tests. 3 2 2 D 2265 D 217 D 942 D 1264 D 2595 D 2596 D 1478 D 2266 D 217 D 1743 1 YTest temperature shall be 177OC + 3OC (35O0F t 5F). An air bath (oven) may be used to perform this test provied the exit Eemperature is within
44、3OC of the test temperature. To insure this, it may be necessary to include an additioqal length of coiled tubing in the line contained.in the air bath (oven). YTest temperature shall be 177OC (350OF). 4.5.2 Performance tests. 4.5.2.1 Performance life test. 4.5.2.1.1 Apparatus. The test apparatus sh
45、all consist of the following: (a) Vertical shaft double bearing grease life test unit with pneumatic loading piston for applying a thrust load of 4000 newtons (900 pounds force) to the end-most bearing outer race (see figures la and lb). Test assembly shall be heater tape of sufficent capacity to ma
46、intain specified bearing temperature, mounted on shock mounts. The test bearing cylinder shall have an electric wound around its outer surface, 13 mm by 1.2 m (l/l-inch by 4 foot) long, found suitable for this purpose). The outer (or load end) bearing should (288 watt tape with heavy duty insulation
47、 for use on metal surfaces has been have two thermocouples located so as to contact the bearing outer diameter at mid-width; one thermocouple shall be used to determine bearing outer race temperature, the second, to actuate a temperature controller for the heater tape. The inner (or motor end) beari
48、ng shall have one thermocouple in contact with the bearing outside diameter at mid-width to determine outer race temperature of this bearing. Detais /of ithe test bearing spindle and cylinder are shown in figure 2. I _ . _- . . -_ _ . -_ 5 Provided by IHSNot for ResaleNo reproduction or networking p
49、ermitted without license from IHS-,-,-DOD-G-24508A(NAVY) (b) Driving motor,. 3550 f 50 revolutions per minute tr/min) rated speed, 3.7 kilowatt (kW) (5 horse-power (hp), with double end shaft connected to one test unit on each end through flexible couplings. The motor circuit shall incorporate a motor overload breaker which will secure the unit when motor current exceeds breaker setting. Rating of breaker to be 140 percent of normal running curren
