1、DOD-B-2Yb73 b3 W 77777Ob 0237078 5 = I METRIC I DOD-B-24673 31 July 1986 SUPERSEDING MIL-B-6 74 C 17 February 1965 MILITARY SPECIFICATION BELLS, SHIPS AND SMALL CRAFT This specification is approved for use by all Departments and Agencies of the Department of the Defense. 1. SCOPE 1.1 Scope. This spe
2、cification covers bells for use aboard ship and small craft. 1.2 Part identification. Bells and gongs furnished under this specifica- tion shall be of the following sizes as specified (see 6.1 and 6.2) and shall be identified by part numbers as defined below: PART NUMBER D24673- 1 D24673-2 D2 467 3-
3、3 D24673-4 D2 46 7 3-5 D24673-6 D246 73-7 D246 7 3-8 DESCRIPTION 1.4 Kilogram bell 2.2 Kilogram bell 4.5 Kilogram bell 9 Kilogram bell 14 Kilogram bell 27 Kilogram bell 34 Kilogram bell 90 Kilogram bell 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The followi
4、ng specifications and stan- dards 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 i
5、n the solicitation. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed
6、Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 6350 DISTRIBUTION STATEMENT A Approved for public release; distribution unlimited THIS DOCUMENT CONTAINS 10 - PAGES. Provided by IHSNot for ResaleNo reproduction or networkin
7、g permitted without license from IHS-,-,-DOD-B-ZLIb73 b3 W 7777706 0237077 7 DOD-B-24673 SPECIFICATIONS FEDERAL PPP-B-576 - Boxes, Wood, Cleated, Veneer, Paper Overlaid. PPP-B-585 - Boxes, Wood, Wirebound. PPP-B-591 - Boxes, Shipping, Fiberboard, Wood-Cleated. PPP-B-601 - Boxes, Wood, Cleated-Plywoo
8、d. PPP-B-621 - Boxes, Wood, Nailed and Lock-Corner. PPP-B-636 - Boxes, Shipping, Fiberboard. PPP-B-640 - Boxes, Fiberboard, Corrugated, Triple-Wall. STANDARDS FEDERAL FED-STD-H28 - Screw-Thread Standards for Federal Service. MILITARY MIL-STD-129 - Marking for Shipment and Storage. MIL-STD-143 - Stan
9、dards -and Specifications, Order of Precedence for the Selection of. (Copies of specifications and standards required by contractors in connec- tion with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Other publication
10、s. The following documents form a part of this speci- fication to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted shall be those listed in the issue of the DoDISS specified in the solicitation. Unless otherwise specified, the issues of docum
11、ents not listed in the DoDISS shall be the issue of the nongovernment docu- ments which is current on the date of the solicitation. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) B 584 - Standard Specification for Copper Alloy Sand Castings D 3951 - Standard Practice for Commercial Packaging. for
12、 General Applications. (DoD adopted) (DoD adopted) (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Nongovernment standards and other publications are normally available from the organizations which prepare or
13、which distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited herein (except for associated detail specifications, spe
14、cification sheets or MS standards), the text of this specifi- cation shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. Provided by IHSNot for ResaleNo reproduction or networking permitted with
15、out license from IHS-,-,-DOD-B-24673 63 3777706 0237300 T DOD-B-24673 3. mQUIREMENTS 3.1 Material. 3.1.1 Bell bodies and clappers. Bell bodies and clappers shall be copper- silicon alloy castings in accordance with ASTM B 584, Copper Alloy, UNS No. C87200. Bell castings shall be free from internal s
16、tresses or strains which may cause cracking of the bell. 3.1.2 Fittings. Fittings such as bolts, nuts, washers, pins, and sup- porting lugs shall be of copper-silicon alloy in accordance with ASTM B 584. ? 3.1.3 Selection of materials. Specifications and standards for all materials, parts, and gover
17、nment certification and approval of processes and equipment which are not specifically designated herein and which are necessary for the execution of this specification shall be selected in accordance with MIL-STD-143. 3.2 Construction. The construction mass, and dimensions shall conform to figures
18、1, 2, 3 and 4. The shape of the bodies and clappers shall be as shown on figures 1, 2, 3 and 4. 3.3 Marking. The letters “U.S“ shall be cast in relief (raised) or engraved no deeper than 1 millimeter (mm) and shall conform to figures 1, 2, 3 and 4. 3.4 Finish. The exterior of the bell and the interi
19、or from the open end of the bell to the area where the clapper strikes shall have a smooth polished finish. O 3.5 Acoustic properties. Bells shall have full, clear, round, and far- reaching tones as specified in table I, when examined as specified in 4.3. Tone key frequency and sound pressure requir
20、ements for 1.4 and 2.2 kilogram bells are not required; however the examination of 4.3 is required. TABLE I. Tone kevs and sound Dressure levels. Bell mouth size (mm) Bell mass 200 250 300 360 400 5 50 4.5 9.0 14.0 27 -0 34.0 90.0 I “A“6 Natural “G“6 Natural “c“ #6 “B“5 Natural “A“5 Natural “F“ #5 F
21、undamental frequency Hz (+lo) - Sound pressure level (minimum) re: 2x10-i pascal 1760 1570 1100 990 880 740 110 dB 111 dB 112 dB 114 dB 115 dB 117 dB Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-B-2Yb73 b3 M 777770b 0237LOL L DOD-B-24673 3.6 W
22、orkmanship. Surfaces, including threads, shall be free from burrs, sharp edges, and adhering sand. Materials shall be sound, of uniform quality andcondition, and free from seams, cracks, and other defects which may adversely affect the strength, endurance, usefulness/serviceability, appearance or we
23、ar resistance of the part. ceal defects therein shall not be offered for Government acceptance. Any material which has been treated in a manner to con- 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is r
24、esponsible for the performance of all inspection requirements as specified herein. Except as otherwise speci- fied 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 disapprove
25、d by the Government. The Government 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. 4.1.1 Responsibility for compliance. All items must meet all require
26、ments of sections 3 and 5. The inspection set forth in this specification 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 assuring that all p
27、roducts 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, either indicated or actual, nor does it commit the Government to acceptance of defective material. 4
28、.1.2 Each bell shall be supported by the yoke or eyebolt with the clapper in place, and rung by striking the side of the bell with the clapper. The clapper shall be activated by a lanyard. 4.2 Acoustic properties. The tone key produced shall be determined by comparison with a tuning fork calibrated
29、to the fundamental frequency of the bell, or by measurement of the actual frequency of the bell sound pressure levels as specified in 3.5. Table I requirements shall be determined by measurement at one meter distance from the bell. 4.3 Visual examination. While the bell is supported as specified in
30、4.1.2, it shall be visibly examined for compliance with the requirements of 3.1.1 through 3.6. 4.4 Inspection of packaging. Sample packages and packs, and the inspection of the preservation-packaging, packing and marking for shipment and storage shall be in accordance with the requirements of sectio
31、n 5 and the documents specified therein. 4 I( . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-B-24673 63 U 9777706 0237302 3 DOD-B-24673 5. PACKAGING (The packaging requirements specified herein apply only for direct Govern- ment acquisition.)
32、5.1 Preservation. Not applicable. 5.2 Packing. Packing shall be level A, B, C or commerical, as specified (see 6.2). 5.2.1 Packing general requirements. The bells shall be cushioned, blocked, or braced within the containers in a manner to prohibit movement, and the clap- pers shall be secured or cus
33、hioned to prevent knocking. fied (see 6.2) one bell shall be packed per container. When more than one bell is required to be packed in each container the gross mass of the wood or wood cleated boxes shall not exceed 100 kilograms (220 pounds). Unless otherwise speci- 5.2.1 Level A. Bells shall be pa
34、cked in containers conforming to any one of the following specifications at the-option of the contractor: Specification Type or class PPP-B- 58 5 PPP-B-601 PPP-B-621 Class 3 Overseas type Class 2 Boxes shall be closed and banded in accordance with the applicable box specifi- cation or appendix there
35、to. 5.2.2 Level B. Bells shall be packed in boxes conforming to any of the following specifications at the option of the contractor: Specification Type or class PPP-B-576 Class 2 PPP-B-585 Class 2 use PPP-B-591 Weather-resistant PPP-B-60 1 Domestic type PPP-B-621 Class 1 PPP-B-636 Weather-resistant
36、PPP-B-640 Class 2 Box closure and banding or reinforcement shall be as specified in the box specifi- cation or appendix thereto with method V closure applicable to PPP-B-636 boxes. The gross mass of wood or wood-cleated boxes shall not exceed 100 kilograms. Fiberboard boxes shall not exceed the gros
37、s mass (weight) of the box used. 5.2.3 Level C. Bells shall be packed as specified for level B except that the containers may be of the non weather-resistant type or grade and method I closure shall apply for PPP-B-636 boxes. 5.2.4 Commercial. Bells shall be packed in accordance with ASTM D 3951. Pr
38、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-B-24673 63 9999906 0237103 5 M I: DOD-B-24673 5.3 Marking. In addition to any special marking requi ed, (see 6.2), level A, B, and C shipments shall be marked in accordance with MI,L7STD-129, commeric
39、al shipments in accordance with ASTM D 3951. 7 6. NOTES 6.1 Intended use. The ships bells covered by this specification are intended for use on the following: Bellmouth dia. 150 and 200 200 250 300 360 400 550 6.2 Ordering data. Mass weight Usage 1.4 and 2.2 Small crafts less than 12 meters in lengt
40、h. 4.5 Boats 12 meters and over in length but less than 20 meters, and ships watch and fire bell. 9.0 Navy and marine craft 12 meters and over in length but less than 20 meters in length. Submarines less than 100 meters in length. 14.0 Ships and boats 20 meters and over in length but less than 50 me
41、ters. Submarines over 100 meters in Leng th 27 .O Ships 50 meters or over in length but less than 75 meters. 34.0 Ships 75 meters or over in length but less than 15.0 meters. 90.0 Ships 150 meters or over in length. Acquisition documents should specify the following: (a) Title, nun.,er, and date of
42、this specification. (b) (c) (d) Size of bell required (see 1.2)# Level of packing required (see 5.2). Special marking required (see 5.3). 6.3 Subject term (key word) listing. Bells Bells castings Gongs Sound pressure Custodians : Army - ME Navy - SH Preparing activity: Navy - SH (Project 6350-0104)
43、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-B-24673 b3 7777706 023730i.i 7 W DOD-B-24673 ACORN OR CAP NUT DOVETAIL SH 13202937 TABLE II. Mass and dimensions of bells. Mass of bell in Dimensions in millimeters kilograms except as noted A B. C“
44、PER 1 e4 150 105 2.2 200 133 I A I DOVETAIL BULKHEAD PLATE NOTES: Dimensions in millimeters. Mass of clapper to be no less than 3 percent of bell mass. Tolerance: Bell mass and clapper - + 0.2 kilogram. Except where otherwise indicated, tolerances on dimensions less than 150 mm are + 2 mm; over 150
45、mm are - + 3 mm. - Screw threads shall be in accordance with FED-STD-H28. FIGURE 1. 1.4 and 2.2 kilogram bell. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-B-24b73 63 H 777770b 0237105 7 m DOD-B-24673 SECTION A-A I BRACKET (OPTIONAL- i i SH 77
46、698 . BELL ASSEMBLY 82O CSK 14DIA 4- HOLES BULKHEAD PLATE 50 i-Ct-tl CLAPPER NOTE: Dimensions in millimeters. Tolerance: Mass of clapper to be no less than 3 percent Bell mass and clapper + 0.3 kilogram. of bell mass. Screw threads shall be in accordance with FED-STD-H28. FIGURE 2. 4.5 kilogram bell
47、. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-DOD-B-24673 63 7777706 0237306 O M DOD-B-24673 /HEX NUT M14x21MT.,MIN.22 across flats ITH SHWLDER 13 13 CLAPPER SH 2346 NOTES: Except where otherwise indicated, tolerances on dimensions less than 12
48、5 mm are + 2 mm; over 125 mm are + 3 mm. Mass of bell-castings - 9.0 + 0.45 kylograms. Mass of clapper - 0.5 + 0.05kilogram. Dimensions in millimet&s. Screw threads shall be in accordance with FED-STD-H28. FIGURE 3. 9.0 kilogram bell. 9 Provided by IHSNot for ResaleNo reproduction or networking perm
49、itted without license from IHS-,-,-DOD-B-24b73 b3 W 9999906 0237307 2 W DOD-B-24673 pNLY KioGR*ER(KILOGRAMS) MASS OF 14 0.70 10.60 0.04 27 1.35 10.95 0.07 rXHlWL fOLERANC4NOML?IALTOERAHCE STD. HEX. NUT (METRIC) tt-HD-t / DIMENSIONS IN MILLIMETERS EXCEPT AS NOTED 300 200 267 381168 4013 64 I08 i0 5 21 2 13 I638p5 Ml6 x 2 360248 317 51 i 216 15414 03 119 II 6 26.29,16 1-31 2c44!38 M202.
