1、Comments, suggestions, or questions on this document should be addressed to Defense Supply Center Richmond, ATTN: DSCR-VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616 or emailed to STDZNMGTdla.mil. Since contact information can change, you may want to verify the currency of this address i
2、nformation using the ASSIST database at http:/assist.daps.dla.mil/. AMSC N/A FSC 4010 INCH-POUND MIL-DTL-32266 2 June 2008 DETAIL SPECIFICATION WIRE ROPE, 1.5 INCH DIAMETER, GALVANIZED, COMPACTED STRAND, FOR AIRCRAFT ELEVATOR This specification is approved for use by all Departments and Agencies of
3、the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for 1.5 inch diameter, galvanized, compacted strand construction wire rope (see 6.4.8 and 6.4.9) used for Navy shipboard aircraft elevators. The wire rope must provide high tensile stiffness to minimize the cha
4、nges in platform elevation associated with roll-on and roll-off of aircraft and a uniform density that provides consistent tension values in service. It must also provide good bending fatigue performance to accommodate repeated cycling over the various sheaves in the elevator system. The rope must b
5、e resistant to corrosion associated with continual exposure to and operation in a salt water environment. 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
6、 of this specification or recommended for additional information or as examples. While every effort has been 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, whe
7、ther or not they are listed. 2.2 Government documents. 2.2.1 Specifications and standards. The following specifications 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
8、. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32266 2 FEDERAL SPECIFICATIONS RR-W-410 - Wire Rope and Strand. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-C-11796 - Corrosion Preventive Compound, Petrolatum, Hot Application. MIL-PRF-18458 - G
9、rease, Wire Rope - Exposed Gear. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-129 - Military Marking for Shipment and Storage. (Copies of these documents are available online at http:/assist.daps.dla.mil/ or from the Standardization Documents Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA
10、19111-5094.) 2.2.2 Other government documents. The following other government documents 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. STANDARDIZATION DOCUMENTS SD-6 - Provisions
11、Governing Qualification. (Copies of this document are available online at http:/assist.daps.dla.mil/ or from the Standardization Documents Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-government publications. The following documents form a part of this document
12、to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. ASTM INTERNATIONAL ASTM A 90/A 90M - Standard Test Method for Weight Mass of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings. ASTM A 1007 Sta
13、ndard Specification for Carbon Steel Wire for Wire Rope. ASTM A 1023/A 1023M - Standard Specification for Stranded Carbon Steel Wire Ropes for General Purposes. ASTM E 8/E8M - Standard Test Methods for Tension Testing of Metallic Materials. Provided by IHSNot for ResaleNo reproduction or networking
14、permitted without license from IHS-,-,-MIL-DTL-32266 3 (Copies of these documents are available from http:/www.astm.org/ or ASTM International, 100 Barr Harbor Drive, Conshocken, PA 19428-2959.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references
15、cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. Wire rope furnished under this specification shall be products which are authorize
16、d by the qualifying activity for listing on the applicable qualified products list before contract award (see 4.2 and 6.3). Products must be qualified by a test facility located in the continental United States or Canada (see 4.1). The qualifying activity will be advised of any plant relocation, cha
17、nges in key personnel, or major process change(s) for re-qualification testing determinations. 3.2 Material. 3.2.1 Wire rope and strand (see 6.4.7). Wire rope and strand shall be high quality, high carbon steel made by either open-hearth, basic oxygen, or electric furnace process. The steel shall be
18、 free from defects that are a detriment to its appearance or serviceability. 3.3 Finish. 3.3.1 Zinc coating. With the exception of the core strand, all wires in the wire rope shall be drawn galvanized. The wires of the core strand may be either drawn galvanized or galvanized at finished size. Zinc c
19、oating shall conform to the following: Drawn galvanized wire Galvanized at finish size Wire diameter (inch) Minimum weight of zinc coating (oz./sq. ft.) Wire diameter (inch) Minimum weight of zinc coating (oz./sq. ft.) 0.028 to 0.060 0.20 0.028 to .047 0.20 Over 0.060 to 0.090 0.30 0.048 to 0.054 0.
20、40 Over 0.090 to 0.140 0.40 0.055 to 0.063 0.50 0.064 to 0.079 0.60 0.080 to 0.092 0.70 0.093 - larger 0.80 3.4 Lubricant. Each wire of the wire rope shall be coated with a friction-preventive, non-corrosive lubricant conforming to MIL-C-11796, or chemically compatible with MIL-PRF-18458. As a minim
21、um, the lubricant shall operate at temperatures from -65 F to +250 F (-54 C to +121 C). The lubricant shall be applied to the wires during stranding and to the rope during closing. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32266 4 3.5 C
22、onstruction. 3.5.1 Wire rope. The wire rope shall be 1.5 inch minimum diameter, 1.575 inch maximum diameter, 8 x 31, right lang lay (see 6.4.2), parallel-lay independent wire rope core (IWRC), compacted-strand construction. 3.5.1.2 Wire rope assembly. The eight inner strands and the eight outer stra
23、nds shall be closed around the core strand in a single or continuous operation. The outer eight strands shall be nested in the valleys formed by the eight inner strands. 3.5.1.3 Wire rope lay length. The lay length of the finished wire rope shall be between 9.5 and 10.5 inches. 3.5.2 Core strand. Th
24、e wire rope shall have a central core strand that may be compacted at the manufacturers discretion. 3.5.2.1 Core strand configuration. The core strand shall be right-hand lay, 1 x 7 or 1 x 19 Seale construction. 3.5.2.2 Core strand lay length. The lay length of the outer wires of the core strand sha
25、ll be between 2.5 and 3.0 inches. 3.5.2.3 Core strand compaction. If the core strand is compacted, the compaction may be accomplished either by die forming, roller or by swaging. 3.5.3 Inner strands. The wire rope shall have eight compacted inner strands. 3.5.3.1 Inner strand configuration. Each of
26、the inner strands shall be a 1 x 7 construction having a left-hand lay. 3.5.3.2 Inner strand lay length. The lay length of the six outer wires of the inner strands shall be between 1.8 and 2.2 inches. All eight of the inner strands shall have the same lay length within +/- 0.125 inch. 3.5.3.3 Inner
27、strand compaction. Each inner strand shall be compacted either by die forming, roller or by swaging. 3.5.4 Outer strands. The wire rope shall have eight compacted outer strands. 3.5.4.1 Outer strand configuration. Each of the outer strands shall be a 1 x 31 Warrington Seale construction having a rig
28、ht-hand lay. 3.5.4.2 Outer strand lay length. The lay length of the wires in the outer strands shall be between 4.0 and 4.5 inches. All eight of the outer strands shall have the same lay length within +/- 0.125 inch. Provided by IHSNot for ResaleNo reproduction or networking permitted without licens
29、e from IHS-,-,-MIL-DTL-32266 5 3.5.4.3 Outer strand compaction. The outer strands shall each be compacted either by die forming, roller or by swaging. 3.6 Wire tightness. During closing of the wire rope, the outer strands shall be fore-turned sufficiently to ensure that all wires in the outer strand
30、s are tight (see 4.4.8.3). 3.7 Preforming (see 6.4.5). The eight outer strands shall be preformed during closing of the wire rope. 3.8 Prestreching. The finished wire rope shall be prestretched in accordance with ASTM A 1023/A 1023M. 3.9 Wire diameters. Wire used for manufacture of the wire rope sha
31、ll not vary beyond the limits defined as follows: Wire design diameter (inch) Wire design tolerance +/- Inch 0.028 - 0.059 0.0020 0.060 - 0.092 0.0025 0.093 - 0.141 0.142 - 0.200 0.0030 0.0035 3.10 Wire strength. The minimum tensile strength of the main wires (excluding the wires in the core strand
32、and the center wires (see 6.4.1) in all other strands) shall be in accordance with ASTM A 1007. Tensile strength grade/level shall be subject to the requirements of ASTM A 1023/A 1023M to the extent that the minimum breaking strength, wire rope density, tensile stiffness bending fatigue performance
33、and wire ductility are achieved. Wires in the core strand and center wires in all other strands may be lower in strength than the main wires. 3.11 Breaking strength. The wire rope shall have a minimum breaking strength (see 6.4.4) of 250,000 pounds and a maximum breaking strength of 305,000 pounds.
34、3.12 Tensile stiffness. The wire rope tensile stiffness (the product of the cross-sectional area and the modulus of elasticity, AE) shall be a minimum of 18,000,000 pounds as measured by the slope of the strain versus tension curve at a tension of 30,000 pounds. 3.13 Wire joints. If wire joints must
35、 be made in individual wires before or during fabrication of the strands, the wires shall be electrically butt welded. The minimum distance between two wire joints in the same strand shall be 36 inches. 3.14 Bending fatigue performance. The wire rope shall withstand 120,000 bending cycles (straight-
36、bent-straight) over a maximum tread diameter of 59.5, conformally grooved sheave at a tension of 30,000 pounds with less than a ten percent reduction of actual breaking strength. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32266 6 3.15 Wi
37、re ductility. The wires in the wire rope shall meet the following torsion requirements: Wire type Torsion (revolutions) for a gauge length of 100 wire diameters Main wires (excluding core strand) Strand center wires 27.0 100d No requirements Note: To convert to torsion in a 8-inch gauge length, divi
38、de the torsion listed above by 12.5d (d = wire diameter) 3.16 Density. The weight of the finished wire rope shall be between 4.60 and 4.85 pounds per linear foot. 3.17 Identification of product. The wire rope shall be identified in accordance with the following: 3.17.1 Identification by number. Each
39、 manufacturer shall assign a significant identification number on each manufacturing reel of wire rope. 3.17.2 Identification by color tracer filament. Each manufacturer shall identify every wire rope by use of a color filament manufactured into the rope. The specification preparing activity will ap
40、prove/assign of a specific color for each manufacturer desiring qualification. 3.17.3 Identification of reels and shipping containers. Each shipping reel (see 6.4.6) and shipping container shall be marked in accordance with the requirements of MIL-STD-129. The following information shall be included
41、: a. NSN specified in the contract. b. Size. c. Name of wire rope manufacturer. d. Name of contractor. e. Contractor order number. f. Type of wire rope, composition, finish and specification number (MIL-DTL-32266). g. Date of manufacture (month/year). h. For reels with 2 lengths of wire rope, record
42、 distance from outside end to separation point and total length of wire rope on the reel. i. Manufacturing reel/lot number. 3.18 Workmanship. All details of workmanship shall be in accordance with ASTM A 1023/A 1023M, RR-W-410, and the best practice for high quality, elevator wire rope consistent wi
43、th the requirements of this specification. The finished cable shall be uniform in construction and securely laid, free from kinks, loose wires, loose strands, or other defects. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32266 7 4. VERIFI
44、CATION 4.1 Classification of inspections. The inspection and testing requirements specified herein are classified as follows: a. Qualification inspection (see 4.2). b. Conformance inspection (see 4.3). 4.2 Qualification inspection. 4.2.1 Qualification inspection samples. When conducting qualificatio
45、n tests specified herein, samples of wire rope and individual wires shall be taken after any discard has been removed from the head or starting end of the manufactured wire rope. 4.2.1.1 Sample. A qualification inspection sample shall consist of a minimum of 50 feet of wire rope of the same construc
46、tion and diameter produced continuously by one machine or by one series of progressive processing machines and a minimum of 10 feet for each individual wire size. 4.2.2 Qualification testing. Qualification tests shall be performed for the wire rope and each size of individual wire as specified in ta
47、ble I. TABLE I. Qualification and conformance tests and inspections. Tests Requirement paragraph Qualification paragraph Conformance paragraph Wire strength Wire coating Wire ductility Breaking strength Tensile stiffness Bending fatigue performance Density Examination of product 3.10 3.3 3.15 3.11 3
48、.12 3.14 3.16 3.4, 3.5, 3.6, 3.13, 3.17, 3.18 4.4.1 4.4.2 4.4.3 4.4.4 4.4.5 4.4.6 4.4.7 4.4.8 4.4.1 4.4.2 4.4.3 4.4.4 4.4.5 - 4.4.7 4.4.8 4.2.3 Maintenance of qualification. At specified intervals determined by the qualifying activity, the manufacturer must be able to demonstrate that the company st
49、ill has the capabilities and facilities necessary to produce the QPL items in accordance with this specification and in accordance with the provisions governing qualification specified in SD-6. 4.3 Conformance inspection. Conformance inspection shall consist of individual tests and sampling tests. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,
