1、Comments, suggestions or questions on this document should be addressed to Defense Supply Center Columbus, ATTN: VAT, Post Office Box 3990, Columbus, OH 43218-3990, or emailed to switchdla.mil. Since contact information can change, you may want to verify the currency of this address information usin
2、g the ASSIST Online database at http:/assist.daps.dla.mil. AMSC N/A FSC 5930 INCH-POUND MIL-DTL-21604F 27 March 2009 SUPERSEDING MIL-DTL-21604E 23 February 2004 DETAIL SPECIFICATION SWITCHES, ROTARY, MULTIPOLE AND SELECTOR, GENERAL SPECIFICATION FOR This specification is approved for use by all Depa
3、rtments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the general requirements for closed construction rotary multipole and selector switches which are able to make, break, and carry electrical loads up to and including 10 amperes. 1.2 Classification. Switc
4、hes will be classified as specified in the applicable specification sheet (see 3.1 and 6.5). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this spec
5、ification 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 documents cited in sections 3 and 4 of this specification, whether or not they are
6、 listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks 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 cont
7、ract. FEDERAL STANDARDS FED-STD-H28 - Screw-Thread Standards for Federal Services. FED-STD-595/26307 - Gray, Semigloss. DEPARTMENT OF DEFENSE SPECIFICATION MIL-A-8625 - Anodic Coatings, for Aluminum and Aluminum Alloys. MIL-PRF-23827 - Grease, Aircraft and Instrument, Gear and Actuator Screw, NATO C
8、ode Number G-354. MIL-I-24768/13 - Insulation, Plastic, Laminated, Thermosetting, Cotton-Fabric-Base, Phenolic-Resin (FBE). MIL-I-24768/1 - Insulation, Plastic, Laminated, Thermosetting, Glass-Cloth, Melamine-Resin (GME). MIL-DTL-83488 - Coating, Aluminum, High Purity. (See supplement 1 for a list o
9、f associated specification sheets.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-21604F 2 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited
10、.) MIL-STD-202 - Test Method Standard Electronic and Electrical Component Parts. MIL-STD-810 - Environmental Engineering Considerations and Laboratory Test MIL-STD-889 - Dissimilar Metals MIL-STD-1285 - Marking of Electrical and Electronic Parts. DEPARTMENT OF DEFENSE HANDBOOKS MIL-HDBK-454 - Genera
11、l Guidelines for Electronic Equipment. (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or www.assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications.
12、 The following document(s) 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. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) ISO 10012-1 - Quality Assurance Requirements for Measuring E
13、quipment - Part 1: Metrological Confirmation System for Measuring Equipment. (Copies of these documents are available online at http:/dod.nssn.org/search.html or from the American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 10036-8002, telephone 212-642-4900, fax 212-302-1
14、286.) AMERICAN SOCIETY FOR TESTING AND MATERIALS INTERNATIONAL (ASTM) ASTM B139/B139M - Phosphor Bronze Rod, Bar, and Shapes. ASTM B152/B152M - Copper Sheet, Strip, Plate, and Rolled Bar. ASTM B633 - Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel (DoD adopted). ASTM B
15、700 - Electrodeposited Coatings of Silver for Engineering Use. ASTM D3955 - Standard Specification for Electrical Insulating Varnishes ASTM D5948 - Molding, Compounds, Thermosetting. (Copies of these documents are available online at www.astm.org or from the American Society for Testing and Material
16、s, 100 Barr Harbor Drive, West Conshohocken, Pennsylvania, 19428-2959.) SOCIETY OF AMERICAN ENGINEERS (SAE) SAE AMS-QQ-N-290 - Nickel Plating (Electrodeposited). (Copies of these documents are available online at www.sae.org or from Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale
17、, Pennsylvania, 15096-0001) 2.4 Order of precedence. Unless otherwise note herein or in the contract, in the event 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 do
18、cument, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-21604F 3 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements sha
19、ll be as specified herein and in accordance with the applicable specification sheet. In the event of any conflict between requirements of this specification and the specification sheet, the latter shall govern. 3.2 Qualification. Switches furnished under this specification shall be products which ar
20、e authorized by the qualifying activity for listing on the applicable qualified products lists at the time of award of contract (see 4.5 and 6.3). 3.3 Switch types. Switches furnished under this specification shall be as defined in 3.3.1 and 3.3.2. 3.3.1 Switches covered by specification sheet and i
21、dentified by type designation. Switches which are completely defined by a military specification sheet (see 3.1), and switches differing from the specification sheet only in the number of sections and having a number of sections within the minimum and maximum number shown on the specification sheet,
22、 shall be as specified in 6.2. 3.3.2 Switch types not shown on a specification sheet. Where the applicable specification sheet does not show a specific switch type (see 3.3.1), the individual part requirements shall be as specified (see 6.2). The switches shall be a product of the basic style, desig
23、n, and construction as the switches shown on the specification sheets and shall be acquired from a source listed on the qualified products list for the same specification sheet (see 3.2). Unless otherwise specified (see 6.2), the individual switch shall comply with the inspection requirements shown
24、in 4.6. 3.4 Material. Material shall be as specified herein. When a definite material is not specified, a material shall be used which will enable the switches to meet the performance requirements of this specification (see 6.2). Acceptance of any constituent material shall not be construed as a gua
25、ranty of the acceptance of the finished product. 3.4.1 Metals. Metals shall be of sea water corrosion-resistant alloys or shall be plated with IVD aluminum with chromate treatment, type II, class 3 (plate thickness .0003 inch (.008 mm) in accordance with MIL-DTL-83488 immersion zinc flake/chromate d
26、ispersion, zinc plated in accordance with class 2, type II of ASTM B 633; nickel plated in accordance with class 1, grade G of SAE-AMS-QQ-N-290 or anodized in accordance with MIL-A-8625 (aluminum alloys only), to resist corrosion. Aluminum shall not be used for structural parts and operating shaft.
27、3.4.1.1 Contact material and plating. Unless otherwise specified (see 3.1 and 6.2), the movable (rotor) switch blade contact shall be composition A phosphor bronze in accordance with ASTM B139/B139M. The stationary (stator) contacts shall be copper in accordance with ASTM B152/B152M. Threaded holes
28、shall have a minimum of three full threads. The electrical contact surfaces shall be silver plated in accordance with ASTM B700. The movable contact surface shall have an inlay or overlay of a minimum .002 inch (.05 mm) of fine silver or silver alloy. The stationary electrical contact surface shall
29、have a minimum thickness of .0001 inch (.003 mm). 3.4.1.2 Current-carrying parts. Ferrous material or aluminum shall not be used for current-carrying parts, including terminal hardware. 3.4.1.3 Dissimilar metals. When dissimilar metals are used in intimate contact with each other, protection against
30、 electrolysis and corrosion shall be provided. The use of dissimilar metals in contact, which tend toward active electrolytic corrosion (particularly copper alloys, copper, or steel used in contact with aluminum or aluminum alloy) is not acceptable. However, metal plating or metal spraying of dissim
31、ilar base metals to provide similar or suitable abutting surfaces is permitted. (The use of dissimilar metals separated by a suitable insulating material is also permitted.) Dissimilar metals are defined in MIL-STD-889. 3.4.1.4 Lubrication. 3.4.1.4.1 Detent mechanism. The detent mechanism and other
32、mechanical moving parts shall be lubricated with a compound in accordance with MIL-PRF-23827. 3.4.1.4.2 Contacts. Contacts shall be lubricated with a compound in accordance with MIL-PRF-23827, or equal. The method for lubricating with contacts shall result in the application of a minute amount of lu
33、brication on the contacts. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-21604F 4 3.4.1.5 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin content of switch components and so
34、lder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.4.8) 3.4.2 Insulation. 3.4.2.1 Plastic laminates. Unless otherwise specified (see 3.1 and 6.2), plastic laminates shall be in accordance with MIL-I-24768/13, type FBE, or MIL-I-24768/1, t
35、ype GME. 3.4.2.2 Plastic molding. Unless otherwise specified (see 3.1 and 6.2), plastic molding material shall be type MAI-30 or MAI-60 of ASTM D5948. Color shall be gray, approximating color chip of FED-STD-595/26307. 3.4.2.3 Fungus resistance. Switches shall withstand 90 days of exposure to fungus
36、 with no degradation in performance (see 4.8.16). 3.4.2.4 Flammable material. Insulation material shall be fire retardant. 3.4.3 Recovered materials. Unless otherwise specified herein, all equipment, material, and articles incorporated in the products covered by this specification shall be new and m
37、ay be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materials“ means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as o
38、pposed to virgin raw materials. Unless otherwise specified, none of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification. 3.5 Interface and physical dimension requirements. Switches shall be of closed construction so that the switching m
39、echanism and the switching contacts are fully enclosed (except terminals), to prevent foreign matter from entering the switch mechanism or interfering with the contacts. Switches shall be constructed to ensure proper operation when mounted in any position. The switches shall be of the design, constr
40、uction, and physical dimensions specified (see 3.1) and the switch circuit configuration shall conform to the applicable rotor designation specified (see 3.1 and 6.2). 3.5.1 Threaded parts. Unless otherwise specified (see 3.1 and 6.2), threaded parts shall be in accordance with FED-STD-H28. Wherever
41、 possible, unified screw threads shall be used. Where a special diameter-pitch combination is required, the thread shall be of American National Form and of any pitch which is used in the fine-thread series. 3.5.1.1 Engagement of threaded parts. Threaded parts shall engage at least three full thread
42、s in soft metals like aluminum and its alloys. A minimum of two full threads shall be used in harder materials such as brass or steel. When a screw mates with a plastic part, a threaded metal insert shall be contained herein. 3.5.1.2 Locking of screw-thread assemblies. Unless otherwise specified (se
43、e 3.1), all screw-thread assemblies shall be rendered resistant to loosening under vibration. Unless otherwise specified (see 3.1), bronze, stainless steel, or suitably plated steel split type, or internal-tooth lockwashers shall be provided under all nuts or screw heads. The use of locknuts is perm
44、itted in lieu of lockwashers. 3.5.1.3 Hardware. 3.5.1.3.1 Mounting hardware. The mounting hardware shall be as specified (see 3.1). Unless otherwise specified (see 6.2), mounting hardware shall be assembled in the proper order as shown on the applicable specification sheet for direct Government acqu
45、isition or supplied un-assembled along with terminal hardware as specified (see 3.5.1.3.2). 3.5.1.3.2 Terminal hardware. The terminal hardware shall be as specified (see 3.1 and 6.2). If the terminal hardware is not assembled to the switch, it shall be placed in a bag and firmly secured to the switc
46、h. 3.5.1.3.3 Knobs. Unless otherwise specified (see 6.2), switches shall be provided with knobs as specified (see 3.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-21604F 5 3.5.2 Stops. Switches shall be provided with adjustable stops as
47、required (see 3.1) to limit switch positions. Unless otherwise specified (see 6.2), screws and lockwashers required as parts of adjustable stops shall be placed in sturdy bags firmly attached to the switches. 3.5.3 Operating shaft. The shaft shall be steel and shall be insulated from all current-car
48、rying members. The configuration and dimensions shall be as specified (see 3.1). 3.5.3.1 Perpendicularity of operating shaft (applicable to JR, JM, RJR, and RJRA switches). For JR and JM switches with 15 decks or more, the plane generated by the mounting surfaces of the mounting pads shall be perpen
49、dicular to the operating shaft within 1 degree. For RJR and RJRA switches, the mounting surface shall be perpendicular to the centerline of the operating shaft, at the lock arm, within .055 inch (1.40 mm). 3.5.3.2 Rotational float of shaft. For types RJR and RJRA switches, the rotational float of the operating shaft shall not exceed 3 degrees in the detent position before and after the endurance tests. For all other switches, the rotational float of the operating shaft shall
