1、MIL-B-48553 (3) m 9999906 l125lt900 8TO m I INH-Po 1 MIL-B-48553 (AR) AMENDMENT 3 28 October 1992 SUPERSEDING AMENDMENT 2 25 March 1991 MILITARY SPECIFICATION BANDOLEER, XM8 This amendment forms a part of MIL-B-48553 (AR), dated 18 December 1974, and is approved for use by the US Army Armament, Muni
2、tions, and Chemical Command, and is available for use by all Departments and Agencies of the Department of Defense. PAGE 1 Title: Delete “Bandoleer, XM8“ and substitute “Bandoleer, M8“. 2.1: Under Drawings: Delete “Bandoleer, XM8“ and substitute “Bandoleer, M8“. * Under Standards: Add the following:
3、 I FEDERAL FED-STD-191 - Textile Test Methods“ PAGE 2 3.3, line 1: Delete “7035 grains plus or minus 20 grains“ and substitute “1 pound plus or minus 0.05 pounds11. Add new paragraphs 3.5 and 3.6 as follows: “3.5 Slip stitch. The slip stitch shall be easily removable. II AMSC N/A 1 of 4 FSC 1305 DIS
4、TRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-* 4. MIL-B-48553 (3) 9999906 L2519OL 737 = MIL-B-48553 (AR) AMENDMENT 3 “3.6 Preproduction evaluation of ultrasonic weld. T
5、he finished seam shall offer a neat, even appearance. Also, there shall be no holes evident when the seam is held up to a light source and the seam shall possess a minimum of 12 pounds (5.46kg) bond strength when tested in accordance with prescribed bond strength procedure.“ 2.1, subparagraph a: Del
6、ete in its entirety and substitute the following: “a 50ea -Bandoleer for dimensional and visual examina- tion, drop test (see 6.21, and slip stitch test“ PAGE 4 4.3.3: Add the following characteristics: 11111 Pocket overlap Measure II * “112 Ultrasonic bonded seam width not between 5/32 to 5/16 inch
7、 Measure“ Add new paragraphs 4.3.4.2 and 4.3.4.3: “4.3.4.2 Slip stitch test. A sample of 50 bandoleers shall be subjected to a slip stitch test. The slip stitch will be removed by pulling the slip stitch thread overhang until the slip stitch is completely removed. No locking of the slip stitch shall
8、 occur. If three or more bandoleers fail to comply with the above requirement the lot shall be rejected. If one or two bandoleers fail to comply with the requirements, a second sample consisting of the same number of units as specified in the first sample shall be tested. If in the accumulated sampl
9、e four or more units fail to comply with the requirements, the lot shall be rejected.“ * “4.3.4.3 Bond strewth test. Three specimens shall be prepared and subjected to the bond strength test. The ultra- sonic machine shall be considered set properly when three specimens with the same machine setting
10、 have a minimum average peak bond strength of 12 pounds. The test shall be run at the start of each production shift.“ 4.4.1, line 2: Delete “7035 grains plus or minus 20 grains“ and substitute “1 pound plus or minus 0.05 pounds“. 2 , Provided by IHSNot for ResaleNo reproduction or networking permit
11、ted without license from IHS-,-,-MIL-B-48553 (3) 9999906 3253902 673 c MIL-B-48553 (AR) AMENDMENT 3 PAGE 5 * Add new paragraph 4.4.2 as follows: “4.4.2 Bond strenqth test. Three specimens shall be prepared at a particular machine setting as follows: a. b. C. d. e. f. Using the 65 percent (minimum) s
12、ynthetic based outer shell material, cut two 12 inch long swatches in the warp (machine) direction, one 2 inches wide and one 8 inches wide each in the filling (cross- machine) direction. If using a plunge type ultrasonic machine, then use appropriate manufacturers leveling procedures to assure that
13、 the horn is level with the anvil. Use a 5/32 inch (min) wide light knurled faced horn or roller as appropriate. Set the ultrasonic machine with the proper weld time, pressure, and roller speed (if appropriate) to longitudinally bond the 2 inch wide strip in the middle to the middle of the 8 inch wi
14、de strip. Test the bond strength of previously prepared sample per FED-STD-191, TM 5100 except place the top jaw of the tensile tester on one side of the wider base material and place the lower jaw such that it grabs both sides of the narrow strip in an even manner. As an alternate test method, a ca
15、librated spring scale with the capability to detect a minimum of 15 pounds may be used. However, the one side of the wider base material shall be firmly affixed while both sides of the narrow strip may be fixed to the spring scale. The specimen shall be pulled down in a smooth, even manner as not to
16、 jerk the spring scale. I 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-B-Y8553 (3) 999990b 3253903 50T MIL-B-48553 (AR) AMENDMENT 3 The margins of this amendment are marked with an asterisk or vertical lines to indicate where changes (additi
17、ons, modifica- tions, corrections, deletions) from the previous amendment were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in this notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irre- spective of the marginal notations and relationship to the last previous amendment. Custodian: Army-= 4 Preparing activity: Al3-llpA.R ( Proj ect 13 O 5 - AE41) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
