1、27 April 1983 - SUPERSEDING MIL-M-21649B(SH) 28 March 1966 (See 6.11) MILITARY SPECIFICATION MOUNT, RESILIENT, TYPE 5M10,OOO-H This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department o
2、f Defense. 1. SCOPE 1.1 This specification covers the type 5M10,OOO-H resilient mount assembly consisting of three elements: a compression component, a shear component, and a snubber component. Tests are provided for evaluating the rubber compounds in the components and the components themselves. Th
3、is mount assembly has an assigned load capacity of 5,000 to 10,000 pounds and shall support loads only in its axial direction. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. Unless otherwise specified, the fol- lowing specifications and standards of the issue l
4、isted in that issue of the Department of Defense Index of Specifications and Standards (DoDISS) specified in the solicitation form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL QQ-S-781 - Strapping, Steel and Seals. PPP-T-97 - Tape, Packaging/Industrial, Filamen
5、t Reinforced. PPP-B-591 - Boxes, Shipping, Fiberboard, Wood-Cleated. PPP-B-601 - Boxes, Wood, Cleated Plywood. PPP-B-621 - Boxes, Wood, Nailed and Lock-Corner. PPP-B-636 - Boxes, Shipping, Fiberboard. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of
6、use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 5523, Department of the Navy, Washington, DC 20362 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. FSC 5340 Pr
7、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MILITARY MIL-L-10547 - Liners, Case and Sheet, Overwrap; Water-Vaporproof or Waterproof, Flexible. STANDARDS MILITARY MIL-STD-129 - Marking for Shipment and Storage. MIL-STD-407.- Visual Inspection Guide
8、for Rubber Molded Items. 2.1.2 Government drawing. The following Government drawing forms a part of this specification to the extent specified herein. DRAWING NAVAL SEA SYSTEMS COMMAND (NAVSEA) NAVSHIP 803-1385873 - Mount, Resilient; Type 5M10,OOO-H (Copies of specifications, standards, and drawings
9、, required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following documents form a part of this The issues of the documents specification to the extent specifi
10、ed herein. which are indicated as DoD adopted shall be the issue listed in the current DoDISS and the supplement thereto, if applicable. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) D 395 - D 412 - D 429 - D 471 - D 573 - D 792 - D 1149 - D 1186 - D 1229 - D 2240 - D 2632 - Rubber Property - Co
11、mpression Set, Standard Test Method Rubber Properties in Tension, Standard Test Method for. Rubber Property - Adhesion to Rigid Substrates, Standard Rubber Property - Effect of Liquids, Standard Test Rubber - Deterioration in an Air Oven, Standard Test Specific Gravity and Density of Plastics by Dis
12、placement, Rubber Deterioration - Surface Ozone Cracking in a for. (DoD adopted) (DoD adopted) Test Method for. (DoD adopted) Method for. (DoD adopted) Method for. (DoD adopted) Standard Test Method for. (DoD adopted) Chamber (Flat Specimen), Standard Test Method for. (DoD adopted) Nondestructive Me
13、asurement of Dry Film Thickness of Nonmagnetic Coatings Applied to a Ferrous Base, Method for. (DoD adopted) Standard Test Method for. (DoD adopted) Method -for. (DoD adopted) Test Method for. Rubber Property - Compression Set at Low Temperatures, Rubber Property - Durometer Hardness, Standard Test
14、Rubber Property - Resilience (Vertical Rebound), Standard 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-mIL-M-21b47C 53 777770b 0303345 b MIL-M-21649C(SH) (Application for copies should be addressed to the American Society for Testing and Materia
15、ls, 1916 Race Street, Philadelphia, PA 19103.) UNIFORM CLASSIFICATION COMMITTEE AGENT Uniform Freight Classification Ratings, Rules and Regulations (Application for copies should be addressed to the Uniform Classification Committee Agent, Tariff Publication Officer, Room 1106, 222 South Riverside Pl
16、aza, Chicago, IL 60606.) (Industry association specifications and standards are generally available They are also distributed among technical groups for reference from libraries. and using Federal agencies.) 2.3 Order of precedence. In the event of a conflict between the text of this specification a
17、nd the references cited herein, the text of this specifica- tion shall take precedence. 3. REQUIREMENTS 3.1 Qualification. The mounts furnished under this specification shall be products which are qualified for listing on the applicable qualified products list at the time set for opening of bids (se
18、e 4.3 and 6.3). 3.2 Materials. 3.2.1 Metal. The metal components of the mount shall be made of a material equivalent to that specified on the drawing for the mount. The con- tracting activity shall specify (see 6.2) whether the mount is to be manufac- tured from steel or manganese bronze, as shown o
19、n Drawing 803-1385873. The metal components for the mounts shall be formed to shape and shall be finished in accordance with the dimensions and allowable tolerances specified by the applicable drawing. 3.2.2 Rubber. 3.2.2.1 Resilient elements. The components of the 5M10,OOO-H mount assembly shall be
20、 molded to the specified form shown on Drawing 803-1385873. The load carrying resilient elements of the shear and compression components shall be molded from a compound using natursl rubber (see 6.8 and 6.9) as the basic material. ozone resistant compound (see 6.7 and 6.9). The rubber element of the
21、 snubber component shall be fabricated of an oil resistant compound (see 6.7 and 6.9) utilizing polymerized chloroprene or a copolymer product of butadiene and acrylonitrile as the basic material. Coating of the mounts may be accomplished by, but not limited to, dipping, painting, or spraying. BUNA-
22、N components shall be coated with an oil-ozone resistant compound (see 6.7 and 6.9). The natural rubber components shall be coated with an oil- 3.2.2.1.1 Porosity and delamination. The rubber elements in the components of the finished mount shall have no porosity or air pockets, nor delamination in
23、any portion. for these defects. The cut specimens obtained in 4.6.13 and 4.6.19 shall be examined 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-fl-216q9C 53 m 9999906 OLO33Llb m MIL-M-21649C(SH) 3.2.2.1.2 Bond. The rubber elements shall be b
24、onded to the metal compo- .nents, as specified on Drawing 803-1385873. 3.2.2.1.3 Surface condition. There shall be no backrinding nor blisters on the outer surfaces of the rubber elements of the three components. 3.2.2.1.4 Physical reauirements. 3.2.2.1.4.1 Rubber compounds. The vulcanized rubber co
25、mpounds used for the resilient elements of the shear, compression, and snubber components shall conform to the physical requirements specified in table I. TABLE I. Physical requirements for rubber compounds in mount components. Tensile strength (min), lb/in2 Before aging After aging at 194F for 46 h
26、ours Elongation at break (niin) percent Before aging After aging at 194F for 46 hours Compression set (max) after aging at 194F for 46 hours, percent Cold compression set (max), percent Volume change in oil (max), percent Adhesion of rubber to metal (min) lb/ in2 Resilience (max), percent Cut growth
27、 of shear and compression Rubber element components of snubber 2700 2300 2400 2300 400 400 300 250 600 450 No increase in length Test met hods 4.6.2 4.6.4 .4.6.2 4.6.4 4.6.3.1 4.6.12 4.6.13 3.2.2.1.4.2 Hardness. The hardness of the rubber compounds used in the resilient elements and snubbers shall b
28、e determined in accordance with 4.6.10. The hardness found during qualification inspection of the contractors mount and snubber compounds shall be recorded as a requirement with a tolerance of plus or minus a5 points for subsequent quality conformance testing of the contractors mount and snubber com
29、pounds. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-fl-21bLt7C 53 m 7977706 03033Lt7 T m 3.2.2.1.4.3 Specific gravity. The specific gravity of the rubber com- pounds used for the resilient elements and snubbers shall be determined in accor
30、dance with 4.6.11. The specific gravity found during qualification inspection of the contractors mount and snubber compounds shall be recorded as a requirement with a tolerance of plus or minus 0.01 for subsequent quality conformance testing of the contractors mount compounds. 3.2.2.1.4.4 Oil-ozone
31、resistant coating. The oil-ozone resistant coating shall conform to the physical requirements specified in table II (see 6.7). TABLE II. Physical requirements for oil-resistant coating. Property ProDerties of dried film Tensile strength, lb/in2 (min) Elongation at break, percent (min) Properties of
32、coated test specimens Volume change percent (max), after immersion in oil at 158F for 70 hours Adhesion of coating Before immersion in oil After immersion in oil at 158F Ozone resistance after 1 week at 104F in air containing 100 p/m ozone Flexibility of coating after flexing for 6 cycles to 100 per
33、cent elongation Pronerties of coated mount Appearance Film thickness (min) as measured on coated metal, inch Requirement 2000 400 5 No failures No failures No cracks No cracks Shall be free from blisters or other imper- f ections O. 003 Test 4.6.2 4.6.2 4.6.6 e2 4.6.6.2 4.6.7 4.6.8 4.4.3.1.2 4.6.9 3
34、.2.3 Protective treatment. The metal components and elastomers used in the manufacture of the mounts shall be resistant to, or protected against, corro- sion by seawater, spray or other atmospheric conditions encountered in service. Unless otherwise specified (see 6.2), the minimum protective treatm
35、ent shall be equivalent to that specified on Drawing 803-1385873. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3 Recovered materials. Unless otherwise specified herein, all equip- ment, material, and articles incorporated in the products covered
36、 by this spec- ification shall be new and shall 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 reproces
37、sed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless otherwise specifically specified. Mount Shear Compression 3.4 Requirements for finished moun
38、t. Test load, pounds Dynamic stiffness requirement, lb/in 1600 2300 - 3500 8400 18000 - 26000 - 3.4.1 Dynamic stiffness. The dynamic stiffness of individual compression and shear mounts when tested in the axial direction, in accordance with 4.6.14, shall be within the specified limits of table III.
39、TABLE III. Axial dynamic stiffness requirements for shear and cornDression mounts. 3.4.2 Deflection at rated load. Each shear and compression mount, when tested in accordance with 4.6.15, shall not deflect less than 0.55 inch or more than 0.78 inch, and shall not show any break or separation between
40、 com- ponent parts. 3.4.3 Quality of rubber to metal bond. Individual compression and shear mounts, when tested in accordance with 4.6.16, shall show no breaks, cracks, or tears in the rubber elements or evidence of delamination at rubber to metal to bond interfaces. 3.4.4 Strength. Individual compr
41、ession and shear components when tested in the axial direction in accordance with 4.6.17.1, and shear components when tested in the radial direction in accordance with 4.6.17.2, shall not show any separation or break between the parts or any permanent deformation in excess of 1132-inch. The snubber
42、components, when tested in accordance with 4.6.17.3, shall have axial deflections within the range of 0.39 to 0.50 inch under 50,000 pounds load and axial deflections within the range of 0.50 to 0.63 inch under 150,000 pounds load. 3.4.5 Drift. The individual compression and shear mounts, when teste
43、d in accordance with 4.6.18, shall not drift more than SO mils under their respective loads. When tested after the drift test, the dynamic stiffness of the mounts shall be within the specified limits of table III. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license
44、 from IHS-,-,-MIL-M-21b49C 53 7799706 0103347 3 = 3.4.6 Porosity and delamination. The resilient elements of the mounts, when tested and examined in accordance with 4.6.19, shall not show evidence of porosity in the rubber elements nor separation of the rubber elements into distinct layers or lamina
45、tions. 3.5 Identification. Each mount component shall be identified with the markings, specified on Drawing 803-1385873. 3.6 Mount design. shown on Drawing 803-1385873. The mount shall conform to all applicable details 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwi
46、se specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements as specified herein. fied in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirem
47、ents specified herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where suchpinspections are deemed necessary to assure supplies and services conform to prescribed requirements. Except as otherwise speci- 4
48、.2 Classif ication of inspections. The inspection requirements specified herein are classified as follows: (a) Qualification inspection (see 4.3). (b) Quality conformance inspection (see 4.4). 4.3 Qualification inspection. Qualification inspection shall be conducted at a laboratory satisfactory to N
49、AVSEA (see 6.3) on sample units as specified herein. 4.3.1 Samples for qualification inspection. . 4.3.1.1 Rubber samples. For the tests specified in 4.3.2, the prospective contractor shall provide the samples listed in table IV, 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-2Lb3C 53 3333706 0103350 T Type of rubber Quant i ty compound Description of sample Shear and compres
