1、- . . .- . . - - MIL-L-22624A (Wep) 13 June i964 SOP;HYISDING MIL-L-22624 (Wep) i5 August 1960 MILITARY SPECIFICATION LINK, AMMUNITION, 20MM, MARK 6 MODS 4, 5, AND 6 (ASSEMBLY) 1. SCOPE 1.1 Scope. This specification covers the 20MM Ammu- nition Link Mark 6 Mods 4, 5, ana 6, referred to herein as the
2、 Link. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids form a part of this specifi- cation to the extent specified herein. SPECIFICATIONS Military MIL-P-16232 STANDARDS Federal Federal Test Method Standard No. i51 Mi-litary MIL-STD-105 MIL-ST
3、D-129 Phosphate Coatings, Heavy, Manganese or Zinc Base (for Ferrous Metals) . . Metals; Test Methods Sampling procedures and Tables for Inspection by Attributes. Marking far Shipment and Storage . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-
4、L-22 624A DBAWINGS Bureau of Naval Weapons (Code Ident. 10001) LD 522056 LD 615425 LD 615433 LD 6154.34 LD 615435 LD 615436 LD 61.5437 LD 615438 982519 144996 PUBLICATIONS Bureau of Naval Weapons (Code Ident. 10001) OP 2719 Pod, Gun, Mark 4 Mod O (Assembly) . Link, Ammunition, 20MM Mark 6 Mod 4 (Ass
5、embly. Kit, Tool, Gun Pod Ammunition. Link, Cartridge, 20MM, Leading, Mark 6 Mod 5 (Assembls) . Link, CaGtridge, 20”, Wailing, Mark 6 Mod 6 (Assembly). 2OMM Link Packaging, Mark 6 Mod 4. 2OMM Link Packaging, Mark 6 Mod 5 Leading Link. 2OMM Link Packaging, Mark 6 Mod 6 Trailing Link. Target Practice
6、Round, ZOMM, Mark i05 Mod O. Dummy Round, ZOMM, Mark 104 Mod O. Gun Pod Mk 4 Mod O; Descrip- tion, Operation, and Mainte- nance. (Copies of documents required by contra.ctors in connec- tion with specific procurement functions should be obtained from the procuring activity or as directed by the cont
7、ract- ing officer. ) 3.1 Premoduotion samisle. Unless otherwise specified in the contract or order, a preproduction sample of links shall be delivered for testing at a facility designated in the contract or order (see 6.2). The links shall be delivered as follows: 1. . Provided by IHSNot for ResaleN
8、o reproduction or networking permitted without license from IHS-,-,-(a) 486 links shall be Mod 4 links. (b) 36 links shall be Mod 5 links. (o) 36 links shall be Nod 6 links. Fifty-two of the Mod 4 links shall be delivered unbelted. The remainder shall be belted into one belt of 60 links, seven belts
9、 of 50 links, one belt of 13 links, and one belt of 11 links. The preproduction sample shall be manu- factured using the methods proposed for production. Any production by the supplier prior to approval of the pre- production sample shall be at the suppliers risk. 3.2 Compliance with documents. Unle
10、ss otherwise speci- fied, the link shall be in accordance with the require- ments specified herein and in the applicable documents listed in section 2. 3.3 Materials. Materials used in the manufacture of the link shall conform to the material specifications listed in the applicable drawings (see sec
11、tion 2). 3.4 Construction. The link shall meet the requirements specified in 3.4.1 to 3.4.8, inclusive. Nomenclature for link component parts shall be as specified in Figure 1. 3.4.1 Round retention. When tested as specified in 4,6.1.3, the link detent shall retain the stud simu- lating the ammuniti
12、on round at the extractor groove. 3.4.2 Round separation. When tested as speoified in 4.6.i.4, the link shall permit the stud simulating the ammunit.ion round to separate from the link. 3.4.3 Flanae strenath. When the link is tested as speci- fied in 4.6.1.5, the carrier flanges shall not be deforme
13、d to an extent that would permit them to pass beyond the extractor groove in the test stud. 3.4.4 Linking. The lug of any link shall engage com- pletely with the spring and rivet of any link when as- sembled using the linking tool assembly shown in drawings listed in Lists of Drawings (LU) 615433. 3
14、.k5 Unlinkinq. The lug of one link shall not disengage from the spring and rivet of an adjacent link when the links are subjected to the test of 4.6.1.7 (a). Mating parts of two adjacent links shall disengage when the links are subjected to the test of 4.6.1.7 (b). P 3 Provided by IHSNot for ResaleN
15、o reproduction or networking permitted without license from IHS-,-,-MIL-L-Z2624A 13 7749406 0302668 h - _ - MIL-L-22624A 3,4:-6 Pitch distance. Pitch distance shall be defined as The pitch distance for the Mark 6 Mod 4 link shall be 1,601 inches plus or minus 0.024 inch. shown in Figure 1. 3.4.7 Bel
16、t strength, When tested as specified In 4.6.1.9, the ammunition belt formed by the links shall not separate. me increase in average pitch distance of the links shall not exceed 0.010 inch. 3.4.8 Belt flexibilitg. -3i4.8.1 Twist. The belt formed by the links shall be capable of being twisted 360 degr
17、ees in not more than i3 links, 3.4.8.2 Fanning, projectile. end out. Belted links, loaded with dummy ammunition rounds (see 3.7), shall be fanned in a circular pattern with the flanged ends of the carriers touching. The diameter of the circle, measured across the tips of the prodectiles, shall be no
18、t more than 40.0 inches. 3.4.8.3 Fanning, case end out. Twenty-five belted links, loaded with dummy ammunition rounds, shall be fanned in a circular pattern on a smooth surface with the projectile ends of. the rounds pointing inward. The loop formed shall not exceed 20 inches overall (flanged end to
19、 flanged end), 3.4.8.4- Stackin$. There shall be sufficient flexibility in roll to assure feeding a loaded belt into a stacked con- figuration and withdrawfng the belt from that configuration. Roll. is defined as belt flexibility about the longitudinal centerline of the individual links. 3.5 Perform
20、ance characteristics. Links formed into belts and loaded with ZOMM, Mark 100 series ammunition shall be capable of fitting into and functioning with the Mark 4 Gun Pod and its components (Mark 11 Gun Mechanism and Mark 2 Loader). See 3.7 and 3.8. 3.5.1 Belt feeding. Belted links shall be capable of
21、being withdrawn from the gun pod magazine or from stowage containers at the prescribed rate of fire of the gun. The belted links shall pass through feed chutes without catch- ing or binding. 3.5.2 Link positioninq. The belted links of 3.5.1 shall engage the sides of the loader link guide rail and pa
22、ss between the guide rail and the loader sprockets without catching or binding. During the loader ramming operation, 4 - r- - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-the links shall permit stripping of ammunition rounds. 3.5.3 Link and case e
23、jection. When an empty cartridge 4 case or a cartridge is ejected from the gun mechanism revolver, the link receiving the case or cartridge shall unlink from its adjacent link. case or cartridge shall clear the loader without blocking succeeding ejected links. 3.6 Environmental requirements. The lin
24、k containing the 3.6.1. Resistance to salt sprag. Each link tested in accordance with 4.6.1.2 shall be examined visually for evidence of rust. Rust staining and rust drainage shall not be considered when measuring the area of rust spots. Each carrier assembly shall show not more than six rust spots,
25、 each measuring not more than 1/8 inch in diameter or equivalent area. Each loop shall show not more than three rust spots of-the specified diameter. Fkch lug and each spring shall show not more than one rust spot of the specified diameter. Not more than one rust spot, detect- able using a i5 power
26、reading lens, is permissible on the rivet. 3.6.2 Temperature extremes. The belted links shall feed ammunition into the loader, permit ramming of ammunition rounds, accept and retain ejected cartridge cases or car- tridges, and unlink from adjacent links at any temperature between minus 65 degrees Fa
27、hrenheit (F.) and plus 1.65 degrees F. 3.7 Government-furnished property. The following, in quantities specified In the contract or order, are re- quired to determine compliance of the link with the re- quirements of this specification: (a) (b) Target Practice Bounds, 20MM Mark lo5 Duramy Rounds, 2O
28、MM, Mark i04 Mod O. Mod O. 3.8 Government-loaned property. The following are re- quired to determine link conformance to the requirements of this speaification: (a) Loader, Gun, 20plirl, Mark 2 Mod 1. o) Pod Assembly (for Gun Pod Mark 4 Mod O). (a) Ejector Rack Assembly, Aero 7A-l. b) Gun Mechanism,
29、 ,20MM, Mark 11 Nod 5. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.- MIL-L-22 62 4A 3.9 Packaging, P acking and marking. Packaging, packing and marking of the link shall conform to the requirements of section j of this specification. 3.10 Workma
30、nship. Links shall be uniform In quality and temper and shall be free from splits, cracks, scale, scrapes and other defects. shall assure conformance to all requirements of this specification and the applicable documents listed in sec- tion 2. 4. QUALITY ASSURANCE PROVISIONS The quality of workmansh
31、ip 4.1 Responsibility for inspection. Unless otherwise speci- fied In the contract or purchase order, the supplier is re- ments as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any commer- cial laboratory acceptable to the Government. The Govern- men
32、t reserves the right to perform any of the inspections set forth in this specifioation where such inspections are deemed necessary to assure that supplies and services oon- form to prescribed requirements. 4.2 Classification of tests. The inspection and testing of the link shall be classified as fol
33、lows: (a) Preproduction tests. (b) Acceptance tests. . sponsible for the performance of al1 inspection require- 4.3 Lot. A lot shall consist of all links manufactured by the same process at the same plant location and sub- mitted for Government aoceptance at the same time, except that the lot size s
34、hall not exceed 25,000 links. 4.4 Sampling. Unless otherwise specified herein, the provisions set forth in Standard MILSTD-105 shall govern the establishment of sampling plans and procedures for inspection by attributes. 4.5 Examination. 4.51 Components. Prior to assembly of the link, it shall be.as
35、certained that all components procured under separate documents have been inspected, tested, and ac- cepted in accordance with their respective documents. 4.5.2 Packing and marking. It shall be ascertained that packing and marking of the links conform to the require- ments of this specification. 6 g
36、e _ _s- - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-22624A 13 7777906 0302671 b - - /- Y MIL-L-22624A 4.6 - Tests. 4.6.1 Acceptance tests. 4.6.1.1 Visual and mechanical inspection. Link samples selected in accordance with 4.4 shall be t
37、ested for con- formance to 3.2, 3.3, and 3.10. Lot quality shall be judged as specified in 4.6.2 . 4.6.1.2 Salt sprag resistance test. After components of the Mod 4 link have received the phosphate coating of Specification MIL-P-16232, 10 samples of the assembled link shall be subjected to the test
38、of Federal Test Method Standard No. 151, Method 811.1. The link shall meet the requirements of 3.6.1. Test links shall not be reused for other tests nor shall they be delivered to the Government as units of production. 4.6.1.3 Round retention test. links and 10 Mod 6 links shall be selected for the
39、round retention test. equipment shown in Figure 3. The test fixture weight of 2.0 pounds shall be allowed to fall freely a distance of 4.0 inches and strike the test stud. the requirements of 3.4.1. 4.6.1.4 Round separation test. The sample links and test equipment of 4.6.1.3 shall be reused for thi
40、s test. The weight shall be allowed to fall freely a distance of 11.0 inches and strike the test stud. The link shall meet the requirements of 3.4.2. 4.6.1.5 Flange strength test. The test samples of 4.6.1.3 and 4.6.1.4 shall be used with the equipment shown in Figure 4 The test fixture stud shall b
41、e positioned to rest against the upper edges of the carrier detents. weight of 20.0 pounds shall be allowed to fall freely a distance of 30 inches and strike the stud. The link shall meet the requirements of 3.4.3. 4.6.i.6 Linkin test. Twenty Mod 4 links, 10 Mod 5 links and 10 Mod Ib-p- links shall
42、be selected for the linking test. The test shall be performed using the hand linking tool of 3.4.4. The Mod 5 and Mod 6 links will be joined by a Mod 4 link for 10 groups of three. The lug slot of one link shall be positioned to receive the spring and rivet of another link. The link shal3 meet the r
43、equirements of 3.4.4. Ten Mod b links, 10 Mod 5 The test shall be performed using the The link shall meet The Ten Mod 4 links shall be joined as a single belt. 7 -. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-22b29A 13 77777Ob 0302b72 8 M M
44、IL-L-22 624A 4.6.1.7 Unlinking test. Link samples used in the test of 4.6.i.b shall be tested using the equipment shown in Figure 2. The test shall be performed in two stages, as follows : (a) The test fixture weight of 2.0 pounds shall be allowed to fall freely a dis- tance of 3.0 inches and strike
45、 the test stud. Test samples unlinking from each . other are defective. If partial disen- gagement occurs, the links shall be re- stored to their original test position for test (b). The same weight shall be allowed to fall freely a distance of 12.0 inches. Test samples failing to disengage complete
46、ly are defective. (b) 4.6.1.8 Pitch distance test. Eleven Mod 4 links shall be linked and loaded with dummy rounds (see 3.7) and sus- pended vertically from an appropriate holdi device. The pitch distance (defined as shown in Figure 1 shall be measured between the rivet of the second link and the ri
47、vet of the last link. The link shall meet the requirements of 3.4.6. 4.6.1.9 Belt strength test. The belted links of 4.6.i.8 shall be reused with the test equipment shown in Figure 5. The test arbors shall be used t attach the weight assembly to the center link and to attach the first and last links
48、 to their mounting brackets. Measure the distance from the bottom of the weight assembly to the reference line. Raise the 8,O pound weight 18 inches and release it. Again measure the distance between the weight assembly and the reference line. If the change in measurement exceeds 0.288 inch, the inc
49、rease in link pitch does not meet the requirements of 3.407. 4.6.1,lO Twist test. Thirteen Mod 4 links shall be belted and tested for conformance to 3.4.8.1. 4.6.i.ii Fannina test, projectile ends out. Sixty Mod 4 links shall be belted, loaded with dummy rounds, and placed on a plane surface. The links shall be fanned in a circle with the flanged ends of the carriers touching. The belt may be separated to provide the numb
