1、A-A-52422 m 9999974 0342279 767 m NOT MEASUREMENT SENSITIVE A-A- 52 42 2 January 12, 1993 SUPERSEDING (see 5.6) COMMERCIAL ITEM DESCRIPTION BELTS, V: INDUSTRIAL DRIVE, NARROW TYPE The General Services Administration has authorized the use of this commercial item description (CID) as a replacement fo
2、r MIL-B-52919A, MS39277A, MS39278A, and MS39279A, which are canceled. 1.0 Abstract. This CID covers endless, narrow, single and multiple-drive V-belts of three different cross-sectional designations and of various lengths within each designation (see 2.4.1 and 2.4.2). The belts are used in transmitt
3、ing power in industrial applications. 1.1 CID coveraae. This CID does not include all varieties of belts as - indicated by the title (see 2.4.1). 2.0 Salient characteristics. 2.1 Description. The V-belts shall be endless loops having a trapezoidal cross section, measured in inches and millimeters (m
4、m). 2.2 Material. Material shall be as specified herein. The use of recovered material made in compliance with regulatory requirements is acceptable providing that all requirements of this CID are met (see 5.7). 2.2.1 Cord. Cords shall be natural or synthetic fibers twisted into a cord - and treated
5、 for low growth and adhesion to the supporting polymer. 2.2.2 Fabric. Fabric shall be woven or knit natural or synthetic fibers impregnated with rubber. 2.2.3 Rubber. Rubber shall be either natural or a synthetic polymer compound. 2.3 Construction. The belts shall consist of tension members (inserts
6、) and a compression member. The members shall be tightly bonded with rubber, forming an integral unit. A cover may be used (see 2.3.3). Beneficial comments, recommendations, additions, deletions clarifications, etc. and any other data which may improve this document should be sent by letter to: U.S.
7、 Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000. AMSC NIA FSC 3030 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52422 m 9999974 Ol142280 48
8、9 m A-A- 52 4 2 2 2.3.1 Tension members. Tension members shall be either cord or fabric and shall be arranged in a symmetrical pattern parallel to the circumference of the belt and imbedded in the belt structure. 2.3.2 Compression member. The compression member shall form the narrower trapezoided po
9、rtion of the belt in the section below the tension members and shall support the belt in the pulleys. The base that forms the inner circumference of the belt may be plain, cogged, or notched. The compression member shall be rubber and may contain cords or fabrics. 2.3.3 Cover. The cover, if used, sh
10、all consist of one or more plies of stretchable fabric or cord, frictioned or impregnated for adhesion. 2.4 Dimensions. 2.4.1 Cross-sectional designation. The nominal cross-sectional designations in inches and millimeters shall be as shown below, and the belt angle shall be determined by the rideout
11、 and bottom clearance. 3V/9N 3V - 0.38-inch wide by 0.31-inch thick and 9N - 9 mm wide by 8 mm thick. 5V/15N 5V - 0.62-inch wide by 0.53-inch thick and 15N - 15 mm wide by 13 mm thick. 8V/25N 8V - 1.00-inch wide by 0.91-inch thick and 25N - 25 mm wide by 23 mm thick. 2.4.2 Lengths. The standard effe
12、ctive lengths and length tolerance shall be as specified in the engineering standard IP-22 of the rubber manufacturers association. 2.4.3 Rideout and bottom clearance. The position of the top of the belt with respect to the top of the measuring pulley groove (rideout) and bottom clearance between th
13、e bottom of the measuring pulley groove and the bottom of the belt shall conform to the tolerances specified in table I. 2.5 Breaking strength and elongation. The belts shall have the minimum breaking strength shown in table II. The elongation of the belts at the minimum specified breaking strength
14、shall not exceed 8 percent. 2.6 Electrical resistivity. When specified (see 5.2), electrical resistance shall not be greater than 6 megohms. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52422 m A-A- 5 2 42 2 TABLE I. Details for dimensional
15、checking of V-belts. Belt size des ig- nat io1 Pulley groove depth (minimum ) Pulley effect ive outside circumference Pu 1 lei groove angle Pulley groove top width Pulley O.D. mm +0.25 Ggree +O. OO! inch - inch +O. 005 inch 3.820 - - 7.958 - 15.916 - +o. 1 - mm - 95.5 - 191.0 - 318.3 Total inch 12 *
16、 ooc - 25. OOC - 50.000 - +0.13 - mm 3v 9N 5v 15N 8V 2 5N - 300 - 600 - 1000 38 38 38 38 38 38 0.35( - O. 60( - 1. ooc - - 8.6 - 15.0 - 25.1 - 0.340 - O. 590 - o. 990 - - 8.89 - 15.24 - 25.40 Belt size iesig- nation Bottom clear ance (minimum) Rideout ( maximum ) tension inch mm inch pounds Newtons
17、mm - 2.0 - 3.0 - 4.1 3v 9N 5v 15N 8V 2 5N 100 - 225 - 500 - - 445 - 1000 - 2225 0.10 - o. 12 - O. 16 - - 2.5 - 3.0 - 4.1 0.08 - o. 12 - 0.16 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A- 52 42 2 TABLE II. Breaking strength. Cross-sectional t
18、ype designation 1 Designation 1 Breaking strength, minimum Torque required to start I I 3v 9N 5v 15N 8V 2 5N Pounds 400 900 2000 - - - Kilograms - 181 408 907 - - 2.7 Resistance to temperature extremes. The belts shall not be damaged when exposed to a temperature of 158 degrees Fahrenheit (OF), plus
19、 or minus 3.6OF, for 12 hours. The belts shall neither crack nor require a greater torque for the applicable cross-sectional type designations than is specified in table III while exposed to temperatures of minus 32OF, plus or minus 3.6OF. TABLE III. Maximum torque requirements. 3v 9N 5v 15N 8V 2 5V
20、 ft. lb 25 30 35 - - - N m i/ - - 34 41 47 - - to continue ft. lb Nm 12 - - 16 15 - - 20 20 - 27 - i/ Newton Meter per radian. - 2.8 Oil resistance. When specified (see 5.2), the belt thickness shall increase not more than 20 percent or decrease (shrink) not more than 1 percent after exposure to AST
21、M oil no. 1 and ASTM oil no. 3, as cited in ANSI/ASTM D471, at a temperature of 158OF for 22 hours. 2.9 Age. When specified (see 5.2), the age of the belts shall be not more - than 12 months (four quarters) from the time of manufacture to the date of acceptance. belts of the matched set shall confor
22、m to the dimensional requirements for single belts; however, the maximum length difference between the shortest and longest belts in any one set shall not exceed the matching limits shown below: 2.10 Matched sets. When matched sets of belts are required, the individual 4 Provided by IHSNot for Resal
23、eNo reproduction or networking permitted without license from IHS-,-,-A -A-5 2 9 2 2 4 0342283 398 A-A-5 2 422 Matching limits for one set inch Cross-section designation 3V/9N 5V/ 15N 8V/2 5N O. 15-0.30 O. 15-0.60 O. 30-0.75 4-10 4-16 6-24 2.11 Marking. 2.11.1 Identification. Identification shall be
24、 permanent and legible and shall include as a minimum the manufacturers (CAGE) code, the part identification number (PIN), the industry standard belt number, and the national stock number (NSN) (see 5.2 and 5.3). When age is specified (see 5.2), the marking shall include the quarter and year, or mon
25、th and year or week and year. Identification marking shall be accomplished without adversely affecting the acceptability and function of the finished products. 2.11.2 Matched sets. Each belt of a matched set shall be marked as specified in 2.11.1. In addition, belts of a matched set shall be tied to
26、gether and include a tag or label printed with the following notice: “WARNING, THIS IS A MATCHED SET. DO NOT BREAK TIES, EXCEPT AT INSTALLATION”. 2.11.3 Special marking. In addition to the applicable marking specified in 2.11.1 and 2.11.2 each belt that is electric resisting (static conducting) shal
27、l be marked ”SC”. 2.12 Workmanship. Workmanship shall be such as to assure a product free of indentation, press lap, flash untrimmed, blister, torn cover or other defects which may affect its performance, serviceability or appearance. a 3.0 Oualitv assurance Drovisions. 3.1 Responsibility for inspec
28、tion. The contractor is responsible for the performance of all inspections (examinations and tests). 3.2 Contractor certification. The contractor shall certify and maintain substantiating evidence that the product offered meets the salient characteristics of this commercial item description and that
29、 the product conforms to the producers own drawings, specifications, standards, and quality assurance practices. Items with known defects shall not be submitted for Government acceptance. The Government reserves the right to require proof of such conformance prior to the first delivery and thereafte
30、r as may be otherwise provided for under the provisions of the contract. 4.0 Preservation, packaging, packing, labeling, and marking. Preservation, packaging, packing, labeling, and marking for the desired level shall be as specified in the contract (see 5.2). 5.0 Notes. (This section contains infor
31、mation of a general or explanatory nature that may be helpful but is not mandatory.) 5.1 Addresses for obtaining copies of referenced documents. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52 42 2 5.1.1 Non-Government publications. ANSI/AST
32、M D471 “Standard Method for Rubber Property, Effect of Liquids“ is available from the American Society for Testing and Materials (ASTM), 1916 Race Street, Philadelphia, PA 19103. IP-22 (1991) “Narrow V-Belts and Sheaves“ - Engineering Standard, is available from the Rubber Manufacturer8 Association,
33、 Inc. (RMA), 1400 K Street, N.W. Washington, D.C. 20005. 5.2 Ordering data. Acquisition documents should specify the following: a. Title, number, and date of this CID. b. Issue of DODISS to be cited in the solicitation and, if required, the specific issue of individual documents referenced (see 5.1)
34、. c. Part identification number (PIN) and the industry standard belt number (see 2.11.1 and 5.3). d. When belt8 having electrical resistivity (static conductance) are required (see 2.6). e. When belts haing oil resistance are required (see 2.8). f. When belts shall be not more than 12 months old (se
35、e 2.9). 9. Selection of applicable level and packaging requirements (see 4). 5.3 Part or identification number (PIN). The PINS to be used for the belts acquired to this CID are created as follows: A 52422 - XX - XX Number of belts in the set. Example: 04 Resistance: IT OR - Oil resistant. ER - Elect
36、rical resistant. OE - Oil and Electrical resistant. NR - Non-resistant. I CID number. L CID designator. NOTE: In addition to the PIN, the industry standard belt number should be specified (see 2.11.1). EXAMPLE 1: 3V1160. 3V indicates cross sectional designation in inches and 1160 indicates effective
37、 belt length in tenths of inch or 116.0 inches. EXAMPLE 2: 25N12700. 25N indicates cross sectional designation in mm and 12700 indicates effective length in mn. See 2.4.1 and 2.4.2 for details of cross-sectional designaton and Lengths. n 5.4 Metric products. a. Products manufactured to metric d+ensi
38、one will be considered on an equal basis with those manufactured uaing inch-pound units, provided they fall within specified tolerances using conversion tables contained in the latest revision of ASTM E380, and all other requirements of this CID are met. b. If a product is manufactured to metric dim
39、ensions and those dimensions exceed the tolerances specified in the inch/pound units, a request should be made to the contracting officer to determine if the product is acceptable. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52422 m 9999974
40、 0142285 TbO m m- A-A-5 2 42 2 1 c. The contracting officer has the option of accepting or rejecting the I product. 5.5 International standardization. Certain provisions of this CID are the subject of International Standardization Agreement ABCA 63. When amendment, revision, or cancellation of this
41、CID is proposed which could affect or violate the international agreement concerned, the preparing activity will take appropriate reconciliation action through international standardization channels including departmental standardization offices, if required. MIL-B-52919AI dated 29 June 1981 and MS3
42、9277A, MS39278A, and MS39279A, dated 22 June 1981. Belts confirming to this CID are interchangeable/substitutable with belts conforming to MIL-B-52919A, MS39277A, MS39278A, .and MS39279A. 5.6 Supersession and cross-reference data. This CID supersedes 5.7 Regulatory requirements. The offeror/contract
43、or is encouraged to use recovered materials in accordance with Public Law 94-580 to the maximum extent practicable. Custodians: Army - ME Air Force - 99 User activities: Army - ER Navy - MC Review activity: Air Force - 82 7 Preparing activity: Army - AT (Project 3030-0176) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
