1、-_ - MIL-R-q233A 13 m 7979706 031765q q m MIL-R- 4 8 2 3 3A (MI) 24 June 1980 Superseding 13 July 1973 MIL-R-48233 (MU) MILITARY SPZCIFICATION ROD, STABILIZING, COATED FOR 2.75 INCH ROCKET MOTOR MK$/1 also 90% (min.) passing No. 100 U.S. Std. Sieve I Shall meet the re- quirements of Table II TIZBLE
2、II - Composition of Ethyl Cellulose Compound Mat e ria 1 Ethyl Cellulose Plasticizer Normal Butyl Stearate Color or Color Masking Materia tercent by Weight 70 + 2- 10 + 2 - I 20 0.01 (max.) 4 Requirements MIL-B-21465 Red Oil, Dye or Approved Equivalent Provided by IHSNot for ResaleNo reproduction or
3、 networking permitted without license from IHS-,-,-MIL-R- 4 8 2 3 3A (MI ) 3.7.2 Chemical analysis. A chemical analysis of each lot of coating material, showing the percentage of potassium sulfate, shall be furnished to the procuring activity by the contractor. 3.7.3 Thermal shock. The stabilizing r
4、od coating shall show no evidence of loosening, cracking, chipping or other failure after severe thermal shock. 3.7.4 Concentricity. The concentricity, after the thermal shock test, between the outermost surface of the coating and the stabilizing rod shall be as specified on the drawing. 3.7.5 Adhes
5、ion. The minimum average load required to shear the salt coating from a two inch section of the metal rod shall be sixty (60) pounds. 3.7.6 Compression. The inside diameter of the forward portion of the stabilizing rod, when the O.D. is compressed to 2.589 - .O01 inch, shall be sufficient to securel
6、y position the Igniter, MK125. 3.8 Workmanship. All part shall be fabricated and furnished in a thorough, workmanlike manner. They shall be free of burrs, chips, sharp edges, cracks, unblended radii, surface defects, metal shavings, dirt, grease, rust, corrosion products and other foreign matter. Th
7、e cleaning method used shall not be injurious to any part, nor shall the parts be contaminated by the cleaning agent. All required markings shall be neat and sharply defined. Known item defects shall not be submitted with the lot. 3.9 First article inspection. This specification makes provisions for
8、 first article inspection. Requirements for the submission of first article samples-by*e contractor shall be as specified in the contract. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility fpr inspection. Unless otherwise specified in the contract, Che contractor is responsible for the performance
9、of all. inspection requirements as specified herein. otherwise specified in the contract, 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. of the inspecti-ons set forth in the sp
10、ecification where such inspections are dee the filtrate shall be added to the above solution. The solution shall then be dfluted to one liter in a volumetric flash and mixed well. Two 50-ml iiliquots of the coating solution shall be taken for analysis. 4.4.1.3 Analysis. ml beaker, diluted with disti
11、lled water to 400 ml, and 2 ml of concentrated hydrochloric acid shall be added. This solution shall be heated to boiling and 20 ml of 10% barium chloride solution added by pipette. The boiling shall be restarted and continued for five minutes. The sample shall stand overnight and shall then be filt
12、ered through a number 42 Whatman filter paper or equivalent, andwashd uniil the filter paper is free of chloride. The filter paper and precipitate shall then be ignited in a weighed crucible at 600C.to constant weight. 4.4.1.4 Calculation. The percentage of potassium sulfate shall be calculated by t
13、he -following- equation; A 50-1111 aliquot shall be transferred to a 600- * 17 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- R-4 82 3 3A (MI ) 4.4.2 Thermal shock test (see 4.3.3.2). Each of the twenty-five (25) stabilizing rods shall be place
14、d on wood supports in an air bath test chamber at -65F + 2OF, for not less than 6 hours. Within one minute after removal of stabilizing rods from the low temperature air bath test chamber, the stabilizing rods shall be placed in an air bath test chamber at +165F, + 2F, for not less than 6 hours. int
15、erruption. 4.4.3 Concentricity test (see 4.3.3.3). Each of the ten (10) test samples shall be tested for concentricity, using an approved gage. This cycle shall be repeated onCe again without 4.4.4 Adhesion Test (see 4.3.3:4). The adhesion test shall be performed on samples passing the thermal shock
16、 test as follows: 4.4.4.1 Pz. Three (3) test specimens, one from each end and one from the middle, shall be cut from each of the ten stabilizing rods, shall have one-half inch of coating removed from each end, leaving a test specimen of 2 inches + 1/16 inches, The end faces of the coating on the tes
17、t specimen-shall be free of coating material and burrs. Each specimen shall be three inches in length and 4.4.4.2 Conditioning of specimens. Prior to testing, the specimens shall be conditioned at a temperature of +7OoF, + - 5F, for not less than two hours, 4.4,4.3 Test equipMent. - The test equipme
18、nt for the adhesion test shall be any testing machine having a moveable head whose speed can be adjusted to 2 inches 3. 0.250 inches per minute when the machine is running idle, The load indicating mechanism shall be capable of accurately indicating load readings to within + 3 pounds. The jig for ap
19、plying the load to the stabilizing rod test specimen shall be such that the load is applied through surfaces that are flat and parallel to the ends of the stabilizing rod specimens, normal to the long axis of the specimen, so as to shear the chemical coating from the rod. The entire surface area of
20、the coating should be in contact with the test fixture applying the load. 4.4.4.4 Test procedure. Each stabilizing rod specimen shall be tested with the test machine crosshead speed set at 2 inches + 0.250 inches per minute, specimen at time of failure shall be recorded. The maximum load carried by
21、the stabilizing rod 18 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-4 82 33A (MI) 4.4.5 Plating adequacy test (see para 4.3.3 5.1) . for this test are those prescribed by para. 4.4.1 of QQ-P-416 for cadmium plating. The procedures 4.4.6 Plat
22、ing adequacy test (see para 4.3.3.5.2). The procedures for this test are those prescribed by para. 4.5.1 of QQ-Z-325 for electro-deposited zinc. 4.4.7 Inside diameter compression test (see 4.3.3.6). The outside diameterof the forward portion of the rod shall be placed into a gage whose inside diamet
23、er is 2.589 - dol. The inside diameter of the compressed rod shall freely accept a gage of 1.485 5 ,001 O.D., having a .125R corner at the engaging end. * .I * 5. PACKAGING * 5.1 Commercial Packaging (see 6.2) . Preservation, Packing. Unitization. and Marking - Level A, B or * 5.1.1 Level A or B, Pr
24、eservation, packing, unitization, and marking shall be in accordance with MIL-STD-1169 and specifications referenced therein, 5.1.2 ComineTcial. PTeservation, packing, unitization and marking shall be in accordance with MIL-STD-1188. i 6. NOTES “6.1 Intended use. The coated stabilizing rod is intend
25、ed for use as a component of the 2.75 Inch Rocket Motor. 6.2 Ordering data, Procurement documents shall specify the following: a. Title, number and date of this and the item detail specifi- cation. b. Data cards. Data cards shall be prepared for each lot in accordance with the information specified
26、in MIL-STD-1167, except when propellant or explosivelots are involved. and Description Sheets shall be prepared in accordance with MIL-STD- 1171 and the contract. Acceptance with C. Quantity required and deliverey schedules. 19 Provided by IHSNot for ResaleNo reproduction or networking permitted wit
27、hout license from IHS-,-,-MIL-R- 4 8 2 3 3A (MI ) d. Serialization requirements, if applicable. e. Production lot acceptance, if other than specified in Section f. First article sample requirements, if other than specified 4 of this specification. in Section 4 of this specification. g. Packaging req
28、uirements, if other than specified in Section 5 of this specification, h. Tnspection equipment design requirements (see 4.3.4 and 6.3). 6,3 Inspection equipment designs. Inspection equipment designs are of two types - Government Special Inspection Equipment (SIE) designs and contractor designs. STE
29、designs are designated by drawing numbers (under the “Method of Inspection“ headings in Section 4). Design responsibility for all other inspection equipment is assigned to the contractor, Equipment to be designed by the contractor is des i gn ate d I CD It The contractor need not furnish any design
30、when a complete Government SIE design is provided. Unless otherwise speci- fied, however, the contractor may submit alternate or modified contractor designs of SIE in accordance with 6.3.2 and 6.3.3 should he elect to do so. 6.3.1 SIE designs. STE designs may consist of any of the following: a. Deta
31、iled drawings which completely depict all information necessary for the fabrication and use of the item of inspection equipment, as defined in.MIL-STD-LOO. b. A source control drawing or a specification control drawing, C. An envelope drawing, as defined in MIL-STD-100, which establishes the criteri
32、a which a detail design shall mket. When envelope drawings are specified, the contractor shall prepare designs which comply with the criteria therein. 20 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R4 82 3 3A (MI) * c 6.3.2 Contractor designs
33、. Contractor designs are required for all inspection equipment for which SIE designs are not specified, and may include commercial equipment which the contractor proposes to use. which is cataloged and available for purchase by the general public). Contractor designs shall include appropriate operat
34、ing instructions, calibrakion procedures and maintenance procedures. Commercial equipment shall be fully described by cataloging listings or other means whPch provide sufficient information to permit identification and evaluation by the Government, and may include illustrations and engineering data.
35、 any special fixture(s) required to be used with commercial equip- ment, or with SIE designs if not otherwise covered thereby (see 6.3.1.). Designs shall be of the level (per MIL-D-loo?) pecified in the Contract Data Requirements Lists DD Form 1423). contractor s referred to MIL-HDBK-204, “Inspectio
36、n Equipment Design“ for guidance. The specification number and the applicable five-digit code number Cor other specific identifying information) of this specification shall be referenced on each contractor design, together with the component or assembly drawing number and revision letter to which th
37、e specific design applies. (Comercial equipment is defined as unmodified equipment Designs shall be prepared,for E Th from Section 4 6.3.3 Submission of designs for approval. Contractor designs shall be approved by the Government prior to fabricating or procuring the equipment. with the stipulations
38、, time frame and distribution specified in the Contrqct Data Requirements List (DD Form 1423) or in the contract. Partial submission of inspection equipment designs is hermissible and encouraged, However, the completion date for design review will be based on the date of the final submission of desi
39、gns. Designs shall be submitted for approval in accordance * 6,4 Submission of first article sample. Instructions as to the submission and location for testing and evaluation of the first article sample shall be obtained from the Contracting Officer. All inquiries should be forwarded to tne address
40、specified in the contract. 6.5 Definitions. 6.5.1 Contractor. Unless othe&ise specified, the word “Contractor“, used throughout this specification, shall mean any supplier or producer of items or material to the Government. commercial contractors, sub-contractors, Government-Owned, Contractor- Opera
41、ted, (GOCO) and Government-Owned, Government-Operated (GOGO) plants. , This shall include 21 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-48233A 13 7979906 0317675 L MIL-R-48233A (MI) 6. Changes to previous issue. The margins of this specifi
42、cation are marked with an asterisk to indicate where changes (additions, modification, correction, deletions) from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are
43、 cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Custodian: Army-MI 22 Preparing activity: Army-MI Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
