1、f-+P - MIL-M-4b309B 12 H 7797706 0310725 7 H - MILiM-4a309Kim) 2 September i965 S UPEIISEDI EG MIL-M-46309A (MU) 5 December 1961 MILITARY SPECIFICATION MOUNT, TELESCOPE: Mi38 1. SCOPE 1.1 This specification covers performance requirements, quality assurance provisions, and packaging data relative to
2、 a telescope mount designed primarily to provide adjustments in elevation and azimuth for direct fire (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invitation for bids or request for proposal, form a part of this specifi- cation to the extent speci
3、fied herein: SPECIFICATIONS Military MIL-F- 13926 Fire Control Materiel: General Specification Governing the Manufacture and Inspection of MIL-P-14232 MIL-1-45607 Inspection Equipment, Supply and Parts, Equipment and Tools for Army Materiel, Packaging and Packing of ._ - Maintenance of STANDARDS Mil
4、 it ary MIL-STD- 105 MIL-STD-109 MIL-STD- 202 Sampling Procedures and Tables for Quality Assurance Terms and Definitions Test Methods for Electronic and Inspection by Attributes Electrical Component Parts DRAWINGS U.S. Amy, Frankford Arsenal F85 87500 Mount, Telescope: M138 FSC 1240 Provided by IHSN
5、ot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.- PACKAGING DAT? SHEET W- 8587500 Packaging of Mount, Telescope: M138 (Copies of specifications, standards, drawings, and packaging data sheets required by suppliers in connection with specific procurement functions s
6、hould be obtained from the procuring activity or as directed by the con- tracting officer.) 3.1 Fabrication.- The mount shall be manufactured in accordance with Drawing F8587500 and drawings pertaining thereto. 3.2 General specification.- The contractor shall be responsible for adherence to the foll
7、owing requirements of MIL-F-13926: (a) Order of precedence (b) Protective finished surfaces (c) Special accuracy (d) Finish, painting and protective (e) Electrical (E) Part identification and marking (g) Workmanship 3.3 Environmental, 3.3.1 Operating temperatures.- The mount shall meet the applicabl
8、e requirements of 3.4.3 while exposed and thermally stabilized at ambient temperatures of plus 150 degrees and minus 40 degrees Fahrenheit (F) subsequent to which the mount shall meet the requirements of 3.3.2. 3.3.2 Vibration.- with the mount in the normal operating position, it shall be vibrated i
9、n a vertical plane at a constant frequency of 30 cycles per second with an amplitude of 1/16 inch (1/8 inch maximum excursion) for a period of 5 minutes plus or minus 15 seconds. the mount shall show no evidence of loose or damaged parts and the mount shall meet the requirements of 3.3.3 to 3.5 incl
10、usive. Subsequent to vibration, 3.3.3 Sealing.- of the rain test of MIL-F-13926. The mount shall meet the requirements of Procedure I 3.4 Performance. 3.4.1 Orientation.- The mount shall be positioned as follows: (a) (b) The flat mounting surfaces of mount in a horizontal plane. The axis of the tele
11、scope socket parallel to the flat mount- ing surface and parallel to the plane of the centers of the two mounting bolt holes on the left side of the mount. 2 . - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-M-6307B 32 77777Ob 0330727 O W MIL
12、-M-46309B(MU) 3.4.2 Locks. (a) The telescope locking device shall lock and securely hold a 1.375 minus 0.001 inch diameter surface representative of the telescope (see Figure 1). (b) A torque of 4 pound-inches applied to the azimuth eccentric Plug 8587407 shall not change the azimuth alignment of th
13、e mount after the eccentric locking screw has been tightened with a torque of 15 & 1 pound- inche s. (c) A torque of 5 pound inches applied to the elevation adjust- ment screw shall not change the elevation alignment of the mount. 3.4.3 Movement. 3.4.3.1 Deflection.- Rotation of the deflection (azim
14、uth) eccentric Plug 8587407 shall move the adapter at least 12 mils to the right and 12 mils to the left from the position established in 3.4.1. 3.4.3.2 Elevation.- Rotation of the elevation adjustment screw shall move the telescope socket at least 25 degrees (444.45 mils) above and 25 degrees (444.
15、45 mils) below the position established in 3.4.1. 3.4.4 Torque.- With boresight locks released, the running torque required to rotate the adjustment screw for elevation and deflection adjust- ment shall not exceed 5 pound-inches at standard ambient temperature (plus 60 degrees to 90 degrees F). cord
16、ed at standard ambient temperature by more than 5 pound-inches when subjected to extreme temperature of 3.3.1. at extreme temperatures. The torque shall not exceed the values re- The rheostat shall be operable 3.4.5 Instrument light.- The instrument light shall be checked for functional operatton an
17、d illumination when the contacts of the mount are energized with 24 Vdc. knob is actuated. Intensity of the lamp shall vary when the rheostat 3.5 Electrical. 3.5.1 Insulation resistance.- Insulation resistance shall not be less than 10 megohms with a potential of 100 volts direct current applied. 3.
18、5.2 Continuity.- The continuity of the wiring shall be checked for conformance with the applicable wiring and continuity drawing requirements. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection.- Unless otherwise specified in the contract or purchase order, the supplier is responsible
19、 for the per- formance of all inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own facilities or any 3 . _- ,A Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-N-63078 12 7977706 031072 2 W M
20、IL-M-46309B (MU) other facilities suitable for the performance of the inspection require- ments specified herein, unless disapproved by the Government. The Govern- ment reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to
21、assure supplies and services confofm to prescribed requirements, . 4.1.1 General provisions.- The component and subassembly inspection requirements of mL-F-13926 form a part of the Quality Assurance Provisions of this specification. Definitions of inspection terms shall be as listed in MIL-STD-109.
22、4.2 First article (initial production) approval. - The requirement for first article approval and the responsibility (Government or contractor) for first article testing shall be as specified in the contract. The sample for first article approval tests shall consist of three (3) mounts and three (3)
23、 each of every component and subassembly covered by SQAP. The sample shall be manufactured in the same manner, using the same materials, equipment, processes, and procedures as used in regular production. All parts and materials, including packaging and packing, shall be obtained from the same sourc
24、e of supply as used in regular production. 4.2.1 Government testing.- When the Government is responsible for conducting first article approval tests, the contractor, prior to sub- mitting the sample to the Government, shall inspect the sample to insure that it conforms to all the requirements of the
25、 contract and submit a record of this inspection with the sample, including certificates of conformance for materials . 4.2.2 Contractor testin%.- When the contractor is responsible for conducting first article approval tests, the sample shall be inspected by the contractor for all the requirements
26、of the contract. and a record of this inspection, including certificates of conformance for materials, shall be submitted to the Government for approval. The Government reserves the right to witness the contractors inspection. The sample 4.3 Inspection provisions. 4.3.1 Submission of product.- Unles
27、s otherwise specified by the contracting officer, inspection lot size, lot formation and presentation of lots shall be in accordance with Submission of Product“ provisions of MIL-STD-105. 4,3.2 Examination and tests.- Components and subassemblies shall be inspected in accordance with the inspection
28、provisions contained in MIL-F-13926, and the Supplementary Quality Assurance Provisions (SQAP) listed in the List of Inspection Documents (IEL) when provided with the technical data package (TDP). Examinations and tests related to Section 3 herein shall be performed on a single defect (individual ch
29、aracteristic) basis in accordance with MIL-STD-105, and the sampling plans specified in Tables 1 and II. Examinations and tests for Packaging, Packing and Marking 4 i. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-shall be in accordance with MIL-P-
30、14232 and Section 5 herein. classification of defects in Tables I and II shall constitute the minimum inspection to be performed by the supplier prior to Government acceptance or rejection by lot. The tabulated TABLE 1 - CIASSIFICATION OF DEFECTS CRITICAL: “E REQUIREMENT TEST PROCEDURE - MAJOR: AQL
31、1.0% Defective 102. Locks 3.4.2 4.6.5 103. Deflection 3.4.3.1 4.6.6 104 . E leva t ion 3.4.3.2 4.6.7 105. Torque 3.4.4 4.6.8 106. Instrument Light 3.4.5 4.6.9 107. Insulation Resistance 3.5.1 4 . 6 . 10 . 1 108. Continuity 3.5.2 4 . 6 . 10 2 101. Vibration 3.3.2 4.6.2 4.3.3 Acceptance and rejection.
32、- Rejected lots shall be screened for all defective characteristics. units and resubmittance of rejected lots shall be in accordance with “Acceptance and Rejection“ as specified in MIL-STD-105. Removal or correction of defective 4.4 Environmental,- Three (3) mounts shall be selected at random from e
33、ach 50 produced or from each months production, whichever occurs first, for the following tests specified in Table II. TABLE II CONTROL TEST REQUIREMENT TEST PROCEDURE 301. Operating temperature 3.3.1 4.6.1 302.- Sealing 3.3.3 4.6.3 4.4.1 Failure of sample.- Shouid any one item of a special sampling
34、 fail to meet the specified test requirements, acceptance of the product will be suspended by the Government until necessary corrections have been made by the contractor and the resubmitted samples have been approved , (see 4.3.3). 4.5 Inspection equipment.- Except as otherwise provided for by the c
35、ontract, the contractor shall supply and maintain inspection equipment in accordance with the applicable requirements of MIL-1-45607. 4.5.1 Government furnished inspection equipment.- Where the contract provides for Government furnished test equipment, supply and maintenance of test equipment shall
36、be in accordance with the applicable requirements specified in MIL-1-45607. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.5.2 Contractor furnished inspection equipment. 4.5.2.1 Government decipn.- Unless otherwise specified in the contract, all
37、 inspection equipment specified by drawing number in specification or SQAP forming a part of the contract shall be supplied by the contractor in accordance with technical data listed in the List of inspection Docu- ments (IEL), when provided with the Technical Data Package (TDP). 4.5.2.2 Contractor
38、design.- The contractor shall provide inspection equipment compatible with the l1Tes t Methods and Procedures“ specified in 4.6 and with the “Component Inspection“ and “Test Facilities“ requirements of MIL-F-13926. Since tolerance of test equipment is normally considered to be within loo/, of the pr
39、oduct tolerance for which it is intended, this inherent error in the test equipment design must be considered as part of the prescribed product tolerance limit. materials, dimensions and tolerances used in the design of test equipment shall be so selected and controlled as to insure that the test eq
40、uipment will reliably indicate acceptability of a product which does not exceed 90% of the prescribed tolerance limit, and permit positive rejection when non-conforming. Construction shall be such as to facilitate routine calibration of test equipment. Thus, concept, construction, 4.6 Test methods a
41、nd procedures. 4.6.1 Operating temperatures.- The mounts shall be subjected to the temperatures specified in 3.3.1 utilizing the test facilities referenced in 4.5.2.2. The temperature shall be changed gradually to avoid thermal shock. When the mount has been thermally stabillzed at each extreme temp
42、erature it shall meet the requirements of 3.4.3 and 3.4.4. Upon return to standard ambient temperature, the mount shall be tested in accordance with all remaining tests specified herein to determine compliance with respective requirements referenced in each test. 4.6.2 Vibration.- The mount shall be
43、 mounted on a vibration machine equipped with facilities to securely hold the mount while the machine is in motion. amplitude and for the period of time specified. a visual examination shall be made to determine evidence of physical failure or damage and the mount shall then meet all requirements as
44、 defined in 3.3.2. The mount shall be vibrated in accordance with-3.3.2 at the Subsequent to vibration, 4.6.3 rain test, Procedure I of MIL-F-13926. shall be examined by visual and tactile means for evidence of moisture or damage, then successfully tested for the performance requirements specified h
45、erein. Sealing.- This test shall be performed as specified in the Subsequent to this test, the mount - 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-4b307B 12 M 7779706 03L073L 2 M MIL-M-46309B (HU) 4.6.4 Orientat ion. (a) The mounting surf
46、aces of the mount shall be positioned and secured on a mounting plate that is level within 1.0 mil. The axis through the telescope socket shall be parallel to the flat mounting surfaces within 3 minutes (OO3). (b) Secure the auxiliary telescope, held by bushing (Figure l)., in the mount socket with
47、telescope locking clamp. pattern and target shall be aligned. The reticle cross line (c) The elevation locking lever shall be in the locked position and torque of 15 5 1 pound-inches to the deflection locking screw shall be applied. 4.6.5 Locks.- The mount shall be positioned as specified in 4.6.4 w
48、ith the auxiliary telescope aligned on the target. A torque of 4 pound- inches applied to the deflection eccentric plug shall not change the line of sight of the auxiliary telescope. to the elevation adjustment worm shall not change the line of sight of the auxiliary telescope. A torque of 5 pound-i
49、nches applied 4.6.6 Deflection.- The mount shall be in position as established in 4.6.4. Loosen the deflection locking screw. Rotate the deflection (azimuth) eccentric plug to move the auxiliary telescope to the right and then to the left. During this rotation view through the auxiliary telescope and ascer- tain if the movement, as measured by the target markings, meets the minimum requirements specified in 3.4.3.1. Return line o
