1、Comments, suggestions, or questions on this document should be addressed to Defense Logistics Agency Aviation - VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616, or e-mailed to STDZNMGTdla.mil. Since contact information can change, you may want to verify the currency of this address inform
2、ation using the ASSIST database at https:/assist.dla.mil/. AMSC N/A FSC 4010 INCH-POUND MIL-DTL-3903F 17 May 2013 SUPERSEDING MIL-DTL-3903E 27 October 2009 DETAIL SPECIFICATION WIRE ROPE ASSEMBLIES, SINGLE LEG, (SLING TYPE) Reactivated after 27 October 2009 and may be used for new and existing desig
3、ns and acquisitions. This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers wire rope assemblies, single leg with plain end loops. 1.2 Classification. The wire rope assemblies are of the following types and c
4、lasses, as specified (see 6.2): Type I - Hand splice, wire rope, improved plow steel, fiber core Type II - Mechanical splice, wire rope, improved plow steel, independent wire rope core Class 1 - 6 by 19 (RR-W-410, Type I, Class 2, assemblies with wire rope diameter of 1-1/8 inch and under) Class 2 -
5、 6 by 37 (RR-W-410, Type I, Class 3, assemblies with wire rope diameter of 1-1/4 inch and over) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHSMIL-DTL-3903F 2 1.3 Part or identifying number (PIN). The PIN to be used for wire rope assemblies acquired to t
6、his specification is created as follows: M 3903 - X X Class: A - 1 - 6 X 19 B - 2 - 6 X 37 Type: 1 - I - Hand splice, wire rope, improved plow steel, fiber core 2 - II - Mechanical splice, wire rope, improved plow steel, independent wire rope core Specification number Denotes military specification
7、2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 and 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has be
8、en made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of the documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The following s
9、pecifications and standards form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. FEDERAL SPECIFICATION RR-W-410 - Wire Rope and Strand COMMERCIAL ITEM DESCRIPTION A-A-52540 - Fittings,
10、Wire Rope DEPARTMENT OF DEFENSE SPECIFICATION MIL-DTL-13220 - Hook, Sliding Choker (for use with Wire Rope) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHSMIL-DTL-3903F 3 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 - Identification Marking of U.S. Milita
11、ry Property MIL-STD-889 - Dissimilar Metals (Copies of these documents are available online at https:/assist.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-government publications. The following documents form a part o
12、f this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR QUALITY (ASQ) ASQ Z1.4 - Sampling Procedures and Tables for Inspection by Attributes (Copies of this document are available
13、online at http:/www.asq.org/ or from American Society of Quality, 600 North Plankinton Avenue, Milwaukee, WI 53203.) ASTM INTERNATIONAL ASTM B633 - Standard Specification for Electrodeposited Coatings of Zinc on Iron and Steel (Copies of this document are available online at http:/www.astm.org/ or f
14、rom ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.) SAE INTERNATIONAL SAE AMS-QQ-P-416 - Plating, Cadmium (Electrodeposited) (Copies of this document is available online at http:/www.sae.org/ or from SAE International, 400 Commonwealth Drive, Warrendale,
15、PA 15096-0001) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regula
16、tions unless a specific exemption has been obtained. Provided by IHSNot for Resale-,-,-MIL-DTL-3903F 4 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.2 and 6.3. 3.2 Description. Wire rope assemblies (hereinaft
17、er called “slings“) shall be as shown in figure 1 and specified herein. 3.2.1 Characteristics. Each sling shall be fabricated from one continuous piece of new and unused wire rope with a loop at each end, secured with either a hand or swage splice, as shown in figure 1. 3.3 Material. Materials shall
18、 be as specified herein. Materials not definitely specified shall be selected by the contractor and shall be new and unused and subject to all provisions of this document. 3.3.1 Material deterioration and control. The slings shall be fabricated from compatible materials, inherently corrosion and det
19、erioration resistant or treated to provide protection against the various forms of corrosion and deterioration that may be encountered in any of the applicable storage and operating environment to which the item may be exposed. 3.3.1.1 Dissimilar metals. Dissimilar metals shall not be used in intima
20、te contact with each other unless protector against galvanic corrosion. Dissimilar metals and methods of protection are defined and detailed in MIL-STD-889. 3.3.1.2 Identification of materials and finishes. The contractor shall identify the specific material, material finish or treatment for use wit
21、h components and sub-components, and shall make information available, upon request, to the contracting officer or designated representative. 3.3.2 Wire rope. Wire rope shall be of improved plow steel and conform to RR-W-410, type I, class 2 or class 3 as applicable, for preformed, regular lay, and
22、shall be the size and finish specified in table I. TABLE I. Wire rope sizes and finish for types I and II slings. Item Wire rope diameter Finish Types I and II Class 1 3/8 through 1-1/8 inches Uncoated or galvanized as specified (see 3.7) Class 2 1-1/4 through 2 inches Uncoated or galvanized as spec
23、ified (see 3.7) Provided by IHSNot for Resale-,-,-MIL-DTL-3903F 5 3.4 Design. 3.4.1 Type I. Type I slings shall conform to table II and shall consist of one continuous length of steel wire rope as specified in 3.3.2 with hand spliced eye loops on each end as shown in figure 1. Splice efficiencyPerce
24、nt8886848280808080808080808080Minimumbreaking strengthTons, galvanized4.477.6611.6516.2321.4527.8435.0340.9649.3658.5468.5879.1890.58102.86Tons, uncoated4.968.5112.9718.0523.8330.9338.9245.5154.8365.0576.2088.06100.65113.95ProofloadTons, galvanized1.983.205.007.009.2012.0015.2017.6022.0026.0028.0034
25、.0040.0044.00Tons, uncoated2.23.65.67.810.213.416.819.624.028.032.038.044.050.0RC(one legverticalpull)Tons, galvanized0.991.602.503.504.606.007.608.8011.0013.0014.0017.0020.0022.00Tons, uncoated1.11.82.83.95.16.78.49.812.014.016.019.022.025.0DiameterInchesClass 1:3/81/25/83/47/811-1/8Class 2:1-1/41-
26、3/81-1/21-5/81-3/41-7/82TABLE II.Strength requirementsin tons(2,000 pounds)fortypeI, classes1 and 2 slings. RC Ratedcapacityisthe maximumrecommendedloadbased on asafety factorof5.Strength requirementscomputed on theefficiency oftheeyespliceand the7-1/2 percentfortesting variation.Provided by IHSNot
27、for Resale-,-,-MIL-DTL-3903F 6 3.4.1.1 Seizing. Seizing shall be of strand conforming to RR-W-410, type V, class 1, or wire and shall be iron or annealed steel, as specified (see 6.2). Construction and dimensions shall be as specified in table III. A seizing if strand or wire shall cover the splice
28、and adjacent strands, which were unlaid during splicing. Seizing shall be tightly wound, each wrap of seizing laying against the preceding wrap, the ends twisted together, and laid against the rope. TABLE III. Seizing strands size and construction. Wire rope diameter (Inch) Seizing strand Seizing wi
29、re minimum diameter (Inch) Diameter (Inch) Construction 3/8 1/16 1 by 7 0.080 1/2 3/32 1 by 7 0.080 5/8 1/8 1 by 7 0.080 3/4 1/8 1 by 7 0.104 7/8 and larger 5/32 1 by 7 0.104 and larger 3.4.1.2 Hand tucks. Hand-tucked splices shall be made by forming a loop and splicing the dead end into the live en
30、d of the rope. Each dead-end strand shall be given one forming tuck and three full tucks around the same strand in the body of the rope. One additional full tuck shall be made when splicing flexible wire ropes such as the 6 by 37 classification. Splices shall be tightly tapped to remove high spots a
31、nd allow the strands to mesh. 3.4.1.3 Forming tucks. Forming tucks shall be made by prying two adjacent strands apart, inserting a dead-end strand into the opening, and passing the strand under one, two, or three adjacent strands in the body of the rope. The dead-end strand shall be set or locked ti
32、ghtly. 3.4.1.4 Full tucks. Full tucks shall be made by inserting a dead-end strand under a strand in the body of the wire rope and rotating it 360 degrees. The tucked strand shall be set or locked tightly. Each subsequent full turn of the dead-end strand around the live-end strand constitutes an add
33、itional full tuck. 3.4.1.5 Setting or locking. Setting or locking of a dead-end strand shall be accomplished by pulling the strand end in under considerable force. At the same time, a marlin spike, inserted in the same opening in the body of the rope, shall be rotated about the axis of the rope back
34、 to the start of the splice or to the previous tuck. 3.4.1.6 Tensile strength. Minimum tensile strength shall be as specified in table II. 3.4.2 Type II. Type II slings shall consist of one continuous length of steel wire rope as specified in 3.3.2, table IV, and with mechanically spliced eye loops
35、on each end as shown in figure 1. Provided by IHSNot for Resale-,-,-MIL-DTL-3903F 7 Splice efficiencyPercent95.095.095.095.095.095.092.592.592.592.592.592.592.592.5Minimumbreaking strengthTons, galvanized5.319.3114.5020.7428.0336.3744.6852.0562.7674.4287.41100.80114.97129.94Tons, uncoated5.9010.3516
36、.1123.0431.1440.4149.4357.8469.7482.6997.12112.00127.75144.37ProofloadTons, galvanized2.24.06.28.811.815.218.022.026.032.036.042.048.054.0Tons, uncoated2.44.46.89.813.217.020.024.030.034.040.048.054.060.0RC(oneleg verticalpull)Tons, galvanized1.12.03.14.45.97.69.011.013.016.018.021.024.027.0Tons, un
37、coated1.22.23.44.96.68.510.012.015.017.020.024.027.030.0DiameterInchesClass 1:3/81/25/83/47/811-1/8Class 2:1-1/41-3/81-1/21-5/81-3/41-7/82TABLE IV.Strength requirementsin tons(2,000 pounds)fortypeII, classes1 and 2 slings. RC Ratedcapacityisthe maximumrecommendedloadbasedona safetyfactorof5.Strength
38、 requirementscomputed on theefficiency oftheeyespliceand the5 percentfortestingvariation.Provided by IHSNot for Resale-,-,-MIL-DTL-3903F 8 3.4.2.1 Mechanical splices. A mechanical splice shall be fabricated by pressing or swaging one or more metal sleeves over the rope junction. 3.4.2.2 Fittings. Sw
39、age sleeves shall conform to A-A-52540 or other swage sleeves that conform to the quality assurance provisions of A-A-52540. 3.4.2.3 Strand ends. Spliced strand ends shall be neatly cut. Burning shall not be permitted. 3.4.2.4 Tensile strength. Minimum tensile strength shall be as specified in table
40、 IV. 3.5 Choker hooks. When specified (see 6.2), a sliding choker hook shall be fitted between the loops of each sling. Hooks shall be the applicable size for the wire rope and shall conform to MIL-DTL-13220. 3.6 Dimensions. The length of the slings shall be the length from bearing point to bearing
41、point when the loops lay the natural and the length of the loop is approximately twice the width of the loop (see figure 1). The length of the sling and loop shall be as specified in table V (see 6.2). The slings shall not vary from the length specified more than 2 diameters of the wire rope used, o
42、r 0.5 percent of sling lengths, whichever is greater. 3.7 Finish. Types I and II slings shall be finished as specified (see 6.2). When zinc-coated rope is specified, the metal sleeves of type II slings shall be zinc-coated in accordance to ASTM B633, Fe/Zn 25, type II finish or cadmium plated in acc
43、ordance with SAE AMS-QQ-P-416, class 1, type II. 3.8 Identification. Identification shall be in accordance with MIL-STD-130. A metal tag shall be securely attached to each sling. Metal tags shall be corrosion resistant, 0.016 inch minimum thick steel, securely fastened adjacent to one of the eye spl
44、iced loops by corrosion resistant 0.047 inch minimum diameter wire. The tag shall have the following information etched or punched thereon: WIRE ROPE ASSEMBLY, SINGLE LEG (SLING TYPE) NSN_ Rope dia._ Grade_ Length of assembly_ Loop size_ Contract no._ Date_ Manufacturer_ Rated Capacity in short tons
45、 (2,000 pounds) _ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHSMIL-DTL-3903F 9 TABLE V. Sling dimensions. Sling No. Length of sling Length of eye Length of serve Diameter of wire rope Dimensions of “A“ Slings (see figure 1) 1 3 ft. 4 in. 8 in. 1/2 in.
46、2 7 ft. 8 in. 8 in. 1/2 in. 3 20 ft. 10 in. 8 in. 1/2 in. 4 30 ft. 10 in. 8 in. 1/2 in. 5 40 ft. 10 in. 8 in. 1/2 in. 6 50 ft. 10 in. 8 in. 1/2 in. 7 30 ft. 12 in. 10 in. 5/8 in. 8 40 ft. 12 in. 10 in. 5/8 in. 9 50 ft. 12 in. 10 in. 5/8 in. 10 7 ft. 12 in. 12 in 3/4 in. 11 20 ft. 12 in. 12 in. 3/4 i
47、n. 12 30 ft. 12 in. 12 in. 3/4 in. 13 40 ft. 12 in. 12 in. 3/4 in. 14 50 ft. 12 in. 12 in. 3/4 in. 15 20 ft. 13 in. 14 in. 7/8 in. 16 30 ft. 13 in. 14 in. 7/8 in. 17 40 ft. 13 in. 14 in. 7/8 in. 18 50 ft. 13 in. 14 in. 7/8 in. 19 20 ft. 14 in. 16 in. 1 in. 20 30 ft. 14 in. 16 in. 1 in. 21 40 ft. 14
48、in. 16 in. 1 in. 22 50 ft. 14 in. 16 in. 1 in. 23 20 ft. 18 in. 18 in. 1-1/8 in. 24 50 ft. 18 in. 18 in. 1-1/8 in. Dimensions of “B“ Slings (see figure 1) 25 12 ft. 8 in. 6 in. 3/8 in. 26 16 ft. 10 in. 6 in. 3/8 in. 27 12 ft. 10 in. 8 in. 1/2 in. 28 20 ft. 12 in. 10 in. 5/8 in. 3.9 Workmanship. The slings shall conform to the quality and grade of product as specified in RR-W-410, and shall be free from imperfections such as protruding strands, sharp edges, burns, burrs, and corro
