1、NIL-S-52028C 59 = 9999906 0415902 5 A -as- 63 MIL- S-5 20 28 C 27 January 1988 SUPERSEDING MIL-S-52028B 11 October 1967 MILITARY SPECIFICATION SWITCH, VEHICULAR IGNITION : WATERPROOF, STARTER AND MAGNETO, WITH DEGACSER CONTROL This specification is approved for use by all Departments and Agencies of
2、 the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers ignition switches for controlling magnetos and auxiliary equipment on engines in military vehicles. 2. APPLICABLE DOCUMENTS 2.1 Government documents. * 2.1.1 Specifications and standards. The following specifications and stand
3、ards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation. Beneficia
4、l comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: US Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000, by using the self-addressed Standardization Document Improvement Proposal (DD Form
5、 1426) appearing at the end of this document, or by letter. AMSC NIA FSC 5930 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. THIS DOCUMENT CONTAINS / 3 PAGES. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-S-5
6、2028C 59 9 9999906 0435903 7 i- MIL-S-52028C SPEC1 F I CAT IONS FEDERAL QQ-A-59 1 QQ-S-57 1 - Aluminum Alloy Die Castings. - Solder, Tin Alloy: Tin-Lead Alloy; and Lead Alloy. MILITARY MIL-M- 14 - MIL-F-13927 - MI1-C-46168 - MIL-C-53039 - STANDARDS FEDERAL FED- STD-H28 - MILITARY MIL-STD-105 - MIL-
7、STD- 1 3 O MIL-STD-193 - - MIL- STD- 202 MIL-STD-1184 - MIL-STD-45662 c MS24570 - (Copies of specifications and Molding Plastics and Molded Plastic Parts, Thermosetting . Fungus Resistance Test; Automotive Components. Coating, Aliphatic Polyurethane, Chemical Agent Resistant. Coating, Aliphatic Poly
8、urethane, Single Component, Chemical Agent Resistant. Screw-Thread Standards for Federal Services . Sampling Procedures and Tables for Inspection by Attributes. Identification Marking of US Military Property. Painting Procedures and Marking for Vehicles, Construction Equipment and Material Handling
9、Equipment. Test Methods for Electronic and Electrical Component Parts. Electrical Components for Automotive Vehicles; Waterproofness Tests. Calibration Systems Requirements. Switch, Vehicular Ignition: Waterproof, Starter and Magneto, with Degasser Control. standards required by the contractors in c
10、onnection with specific acquisition functions -should be obtained from the contracting activity or as directed by the contracting activity.) * 2.2 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for the MS standard), the
11、text of this specification shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-5202C 54
12、I 9999906 0415904 9 I * sha MIL-S-52028C 3 . REQUIREMENTS 3.1 First article. Unless otherwise specified (see 6.2), 1 furnish switches wich shall be subjected to first artic the contractor e inspection (see 4.5). First article inspection samples, properly marked with identifying information, shall be
13、 representative of the units to be furnished to the Government. All subsequent switches delivered to the Government shall conform to these samples in all of their pertinent physical and performance attributes. 3.2 Materials. Materials shall be as specified herein, in applicable specifications, and o
14、n applicable drawings (see 4.8.1). 3.2.1 Dissimilar metals. Except where necessary to complete an electrical circuit, contact between dissimilar metals, which would encourage galvanic action, shall be avoided. Separation of dissimilar metals shall be accomplished by providing insulation between mati
15、ng surfaces (see 4.8.1). * 3.2.2 Aluminum castings. Aluminum castings shall conform to alloy A380.0 or 413.0 of QQ-A-591 (see 4.8.1). 3.2.3 Molded plastic insulating material. Molded plastic insulating material shall conform to type MFE of MIL-M-14 (see 4.5.1). 3.2.4 Solder. Solder shall conform to
16、composition Sn50 or Sn60 of QQ-S-571. A rosin flux shall be used (see 4.8.1). * 3.2.5 Recycled, virgin and reclaimed materials. There are no requirements for the exclusive use of virgin materials. The use of recycled or reclaimed (recovered) materials is acceptable provided that all other requiremen
17、ts of this specification are met (see 6.3.1). 3.3 Design and construction. Unless otherwise specified (see 6.2), the switch shall conform to MS24570 (see 4.8.1 and 4.8.2). 3.3.1 Standard parts. Military standard parts shall be incorporated wherever applicable. Commercial standard parts may be used p
18、rovided they are interchangeable with military standard parts without modification, and the .1 equivalent military standard part is identified by the manufacturer (see 4.8.1). 3.3.2 Locking devices. Lockwashers, self-locking nuts, or other approved locking devices shall be incorporated where specifi
19、ed or where required to prevent loosening of components (see 4.8.1). 3.3.3 Springs. Springs shall not be used to transmit current (see 4.8.1). 3.3.4 Threaded parts. Screw threads shall conform to PED-STD-H28 (see 4.8.1) . 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without
20、 license from IHS-,-,-MIL-S-5202C 59 E 9999906 0435705 O MIL-S-52028C 3.3.5 Weight. The weight of the switch shall be as specified on the applicable military standard (see 4.8.3). 3.4 Physical requirements. 3.4.1 Lever torque. The torque required to move each lever to its operating position, at temp
21、eratures of -65 degrees Fahrenheit (OF) to 165OF, shall be 3 to 6 pound-inches for the MAGNETOS lever and 7 to 11 pound-inches for the START and BOOST levers. Each lever, when in its operating position, shall withstand a torque of not less than 3 pound-feet without damage at temperatures of -65 to 1
22、65F. requirements of 3.5.1 (see 4.8.4.1). “ The switch shall subsequently meet the 3.4.2 Plunger force. The force required to depress the DEGASSER plunger to its operating position, at temperatures of -65 to 165OF, shall be 7 + 3 pounds. The plunger shall have positive spring return and shall turn r
23、adially in either direction without drag or binding (see 4.8.4.2). 3.4.3 Vibration. Shen tested as specified in 4.8.4.3, the switch shall show no evidence of intermittent or accidental circuit operation and shall subsequently meet the requirements of 3.5.1 and 3.5.3. 3.4.4 Shock. When tested as spec
24、ified in 4.8.4.4, the switch shall show no evidence of intermittent or accidental circuit operation and shall subsequently meet the requirements of 3.5.1 and 3.5.3. 3.5 Electrical requirements. 3.5.1 Circuit continuity. Circuits shall provide continuity through the switch at the various positions of
25、 the levers as specified on the applicable military standard (see 4.8.5.1). 3.5.2 Circuit voltage drop. The voltage drop across each circuit, at a load of 10 amperes, shall be 500 millivolts (see 4.8.5.1). 3.5.3 Dielectric strength. When tested as Specified in 4.8.5.2, the switch shall show no evide
26、nce of burning, charring, loosening, arcing, or uother damage to the insulation. 3.5.4 Endurance. When tested as specified in 4.8.5.3, the switch shall show no evidence of electrical or mechanical failure and shall subsequently meet the requirements of 3.5.1 and 3.5.3. 3.6 Environmental requirements
27、. * 3.6.1 Waterproofness. The switch shall show no evidence of leakage and shall be electrically and mechanically operable during and subsequent to submersion when tested as specified in MIL-STD-1184 for type II, class 2 components (see 4.8.6.1). 4 Provided by IHSNot for ResaleNo reproduction or net
28、working permitted without license from IHS-,-,-MIL-S-52028C 3.6.2 Corrosion. When tested as specified in 4.8.6.2, the switch shall show no evidence of corrosion affecting operation and shall subsequently meet the requirements of 3.5.1 and 3.5.3. 3.6.3 Fungus. When tested as specified in 4.8.6.3, the
29、 switch shall show no evidence of fungus growth affecting operation and shall subsequently meet the requirements of 3.5.1 and 3.5.3. 3.7 Finish. Cleaning, pretreatment, and priming shall conform to MIL-STD-193 (see 4.8.1). * 3.7.1 Painting. Unless otherwise specified (see 6.2), the switch shall be p
30、ainted with pafnt conforming to MIL-C-46168 or MIL-C-53039, color forest green (see 4.8.2). 3.8 Markinq. 3.8.1 Identification marking. identification marking shall conform to MIL-STD-130 and as a minimum shall include the following (see 4.8.2): Military part number Manufacturers identification (see
31、6.2) Manufacturers serial number Date of manufacture (month, year, e.g., JUN 85) us 3.8.2 Operational marking. Operational marking shall be permanent and shall conform to MIL-STD-130 and the applicable military standard (see a 4.8.2). 3.9 Workmanship. Workmanship shall be such as to assure a product
32、 free of sharp edges, burrs, chips, scratches, and rust (see 4.8.2). 4 . QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order (see 6.21, the contractor is responsible for the performance of all inspection requirements as specifi
33、ed 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 reserves the right to perform or witne
34、ss any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. * 4.1.1 Responsibility for compliance. All items must meet all requirements of sections 3 and 5. The inspection set forth in this s
35、pecification shall become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of 5 I. Provided by IHSNot for ResaleNo reproduction or networking permitted withou
36、t license from IHS-,-,-MIL-S-5202C 57 = 7777906 0435707 4-C MIL-S-5 20 28 C assuring that all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, eithe
37、r indicated or actual, nor does it commit the Government to acceptance of defective material. 4.2 Inspection equipment. Unless otherwise specified in the contract (see 6.2), the contractor is responsible for the provision and maintenance of all inspection equipment necessary to assure that supplies
38、and services conform to contract requirements. Inspection equipment must be capable of repetitive measurements to an accuracy of 10 percent of the measurement tolerance. Calibration of inspection equipment shall be in accordance with MIL-STD-45662. Records of calibration of inspection equipment shal
39、l be made available to the Government. 4.2.1 Standard measuring instruments. Standard measuring instruments shall be accurate within the tolerances specified in table i. TABLE I. Measuring instrument accuracy. Tolerance Voltmeter dc L/ + 0.50 percent Millivoltmeter dc + 0.50 percent Ammeter dc (mult
40、i-range) + 0.50 percent i/ dc = direct current - 4.2.2 Apparatus. In addition to standard measuring i.nstruments (see table I), test apparatus shall include a submersion tank and a chamber capable of maintaining air temperatures of -65 to 165F. chamber shall bc held to a minimum to prevent a tempera
41、ture gradient within the chamber and any cooling resulting from excess air motion. Air movement in the * 4.3 Inspection conditions. Unless otherwise specified (see 6.2), all inspections shall be conducted under the following conditions: a. b. Barometric pressure 28.5 (+2, -3) inches mercury. C. Air
42、temperature 73 f: 18F. Relative humidity 50 2 30 percent. Unless otherwise specified herein, test samples shall be temperature stabilized for 1 hour before being subjected to the tests. When specified herein, mounting shall be in the manner as in intended use. 6 Provided by IHSNot for ResaleNo repro
43、duction or networking permitted without license from IHS-,-,-MIL-S-52028C 57 I 7777706 0435708bM MIL-S-52028C e * 4.4 Classification of inspections: a. First article inspection (see 4.5). b. Quality conformance inspections (see 4.6). ( 1) Examination (see 4 . 6.2). (2) Tests (see 4.6.3). C. Control
44、tests (see 4.7). * 4.5 First article inspection. Unless otherwise specified (see 6.2), the Government shall select four switches produced under the Droduction contract for first article inspection. First aiticle samples shali be examined for the defects specified in table III, and tested as specifie
45、d in table 11 in the order listed. fully representative of those inspected as first article samples. Any changes or deviation of the production units from the first article samples shall be subject to the approval of the contracting officer. Approval of first article samples by the Government shall
46、not relieve the contractor of his obligation to supply switches that are * 4.5.1. First article inspection failure. Deficiencies found during, or as a result of, first article inspection shall be cause for rejection of the first article sample until evidence has been provided by the contractor that
47、corrective action has been taken to eliminate the deficiency. found during, or as a result of, first article inspection shall be evidence that all items already produced prior to completion of first article inspection are similarly deficient unless contrary evidence satisfactory to the contracting o
48、fficer is furnished by the contractor. Such deficiencies on all items shall be corrected by the contractor. The Government will not accept products until first article inspection is completed to the satisfaction of the Government. Any deficiency TABLE II. Order of first article tests. I Sample numbe
49、r 1 2 Paragraph 4.8.5.1 4.8.4.2 4.8.4.3 4.8.5.1 4.8.6.3 4.8.5.1 4.8.5.3 4.8.5.1 4.8.6.2 Title Circuits Plunger force Vibration Fungus Circuits Circuits Endur ance Circuits Corrosion I 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-52028C 57 7777906 0435707 8 - Paragraph 4.8.5.1 4.8.4.1 4.8.4.4 4.8.5.1 4.8.5.2 4.8.5.1 4.8.6.1 4.8.5.2 MIL-S-52028C TABLE II. Order of first article te
