1、“6 P GGG-B-500C 11 October 1983 SUPERSEDING GGG-B-500B December 7, 1966 FEDERAL SPECIFICATION BLOCK, TACKLE (WIRE ROPE) This specification was approved by the Assistant Administrator Federal Supply and Services, General Services Administration for the use of all Federal agencies. 1. SCOPE AND CLASSI
2、FICATION 1.1 Scope. This specification covers single-sheave snatch and single- and multiple-sheave ordinary wire rope tackle blocks for regular and heavy duty use. 1.1.1 Federal specification coverage. Federal specifications do not in- clude all varieties of the commodity indicated by the title of t
3、he specifi- cation, but cover only those most generally used by the Federal Government. 1.2 Classification. Tackle blocks shall be of the following types, grades, and styles, as specified (see 6.2): Type I - Snatch blocks single sheave, safety locking. Type II - Ordinary blocks. Grade A - Regular du
4、ty. Grade B - Heavy duty. Style 1 - Single sheave. Style 2 - Double sheave. Style 3 - Triple sheave. FSC 3940 THIS DOCUMENT CONTAINS Ib PAGES. Licensed by Information Handling ServicesGGG-B-5 O0 C 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bi
5、ds or request for proposal form a part of this specification to the extent spec if ied herein : Federal Standards FED-STD-H28 - Screw Thread Standards for Federal FED-STD-123 Services - Marking for Shipment (Civil Agencies) (Activities outside the Federal Government may obtain copies of Federal spec
6、ifications, standards, and commercial item descriptions, as outlined under General Information in the Index of Federal Specifications, Standards, and Commercial Item Descriptions. The Index, which includes cumulative bimonthly supplements as issued, is for sale on a subscription basis by the Superin
7、tendent of Documents, U.S. Government Printing Office, Washington, DC 20402. (Single copies of this specification, and other Federal specifications and commercial item descriptions required by activities outside the Federal Govern- ment for bidding purposes are available without charge from General
8、Services Administration business Service Centers in Boston, MA; New York, NY; Philadelphia, PA; Washington, DC; Atlanta, GA; Chicago, IL; Kansas City, MO; Fort Worth, TX; Houston, TX; Denver, CO; San Francisco, CA; Los Angeles, CA; and Seattle, WA. (Federal Government activities may obtain copies of
9、 Federal standardization documents and the Index of Federal Specifications, Standards and Commercial Item Descriptions from established distribution points in their agencies. ) Military Specifications MIL-B-3865 _- Block, Rope, Tackle: Packaging of MIL-B-5687 - Bearing, Sleeve, Washers, Thrust, Sint
10、ered, Metal Powder, Oil Impregnated Military Standards MIL-STD-105 MIL- STD- 1 2 9 MIL-STD-130 MIL-STD-889 MIL-STD-1188 MS15003 - Sampling Procedures and Tables for - Marking for Shipment and Storage - Identification Marking of US Military - Dissimilar Metals - Commercial Packaging of .Supplies and
11、Equipment - Fitting, Lubrication (Hydraulic) Surface Check; 1/8 Pipe Thread, Steel, Type III Inspection by Attributes Pr Oper t y 2 Licensed by Information Handling ServicesGGG- B-5 O0 C (Copies of military specifications and standards required by contractors in connection with specific procurement
12、functions should be obtained from the pro- curing activity oras directed by the contracting officer.) Federal Regulations 41 CFR 1-1.25 - Recovered Materials (The Code of .Federal Regulations (CFR) and the Federal Register (FR) are for sale on a subscription basis by the Superintendent of Documents,
13、 U.S. Government Printing Office, Washington, DC 20402. When indicated, reprints of certain regulations may be obtained from the Federal agency responsible for issuance thereof.) . 2.2 Other publications. The following documents form a part of this speci- fication to the extent specified herein. Unl
14、ess a specific issue is identified, the issue in effect on date of invitation for bids or request for proposal shall apply American Society for Testing and Materials (ASTM) ._ A36 A148 A153 A675 - Structural Steel - High Strength Steel Castings for - Zinc Coating (Hot Dip) on Iron and Steel - Steel
15、Bars, Carbon, Hot Wrought, Special Structural Purposes Hardware Quality, Mechanical properties (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) American National Standards Institute, Inc. (ANSI) B46.1 - Surface
16、Texture Surface Roughness, Wavi- ness and Lay m (Application for copies should be addressed to. the American National Standards Institute, Inc., 1430 Broadway, New York, NY 10018.) National Motor Freight Traffic Association, Inc., Agent National Motor Freight Classification (Application for copies s
17、hould be addressed to the ATA Traffic Department, 1616 P Street, N.W., Washington, D.C. 20036) 3 Licensed by Information Handling ServicesGGG-B-500C Uniform Classification Committee, Agent Uni form Freight C1 as s i fica t ion (Application for copies should be addressed to the Tariff Publishing Offi
18、ce, Suit 1106, 222 South Riverside Plaza, Chicago IL 60606.) 3. REQUIREMENTS . 3.1 Description. The blocks shall consist of a shell, one or more sheaves and straps combined with all .necessary interconnecting fittings to form a complete unit assembly. 3.2 First article. When specified (see 6.21, a s
19、ample shall be subjected - to first article inspection (see 4.3 and 6.3). 3.3 Material. Material shall be as specified herein. .Materials not speci- fied shall be selected by the contractor and shall be subject to all provisions of this specification. 33.1 Regulatory requirements. The offeror/contra
20、ctor is encouraged to use recovered materials in accordance with Public Law 94-580 (41 CFR 1-1.25) to the maximum extent practical. 3.3.2 Material. deterioration and control. The block shall be fabricated from compatible materials, inherently corrosion resistant or treated to provide protection agai
21、nst 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. 3.3.2.1 Dissimilar metals. Dissimilar metals shall not be used in intimate contact with each other unless protected against galvan
22、ic corrosion. metals and methods of protection are defined and detailed in MIL-STD-889. Dissimilar 3.3.2.2 Identification of materials and finishes. The contractor shall identify the specific material, material finish or treatment for use with components and sub-components, and shall make informatio
23、n available, upon re- quest to the contracting officer or designated representative. 3.4 Screw threads. All screw threads shall conform to Fed. Std. No. H28. 3.5 Strength. 3.5.1 Proof load. When subjected to a proof load of twice the safe working load (SWL) specified in Tables I and II, the block sh
24、all show no evidence of deformation, distortion, cracks or permanent set of any component. 4 Licensed by Information Handling ServicesGGG-B-SOOC 37 777777Li 0037725 3 GGG-B-500C Table I. TVDe I. snatch blocks Minimum diameter at depth of sheave groove Sheave size OD Rope dia. SWL Inches Inch Inches
25、(Lbs. 4 , O00 6,000 8,000 10,000 12,000 15,000 318 to 112 112 to 518 518 to 314 314 to 718 718 to 1 1 4-112 - 6-118 7-314 9-318 11 13 6 8 10 12 14 16 Table II. Type II, regular blocks r Grade A Grade B I Style Style i SWL 3 SWL 3 SWL + dia, Rope dia. 2 SWL 1 SWL Lbs. 3,000 4,000 5,000 6,000 9,000 -
26、Lbs. 4,500 7,000 9,000 10,000 12 , O00 16,000 Lbs. 6,000 9,000 10,000 12,000 20 , O00 16,000 Inches 6 8 10 12 14 16 Inch Lbs. 4,000 5,000 6,000 9,000 11,000 - Lbs. 5,000 11,000 6,000 7,000 13,000 - 318 to 112 112 to 518 5 18 518 to 314 314 to 718 - 112 to 518 518 518 to 314 314 to 718 718 to 1 1 4 ,
27、 O00 5,000 7,000 9,000 10,000 13,000 Note: For minimum diameter at depth of sheave groove, refer to type I of table I. 3.5.2 Ultimate strength. When tested for ultimate strength, the fittings, hook, or shackle shall not fail at loads less than 4 times the SWL specified in tables I and II. The block
28、shall then be further tested to destruction but shall not fail at loads less than 5 times the SWL specified in tables I and II. 3.6 Fastening devices. Bolts, nuts, rivets, shell pipe sleeves, cotter pins, and other items used as fasteners or spreaders, shall be made of commercial quality steel commo
29、nly used for this purpose. Such parts shall not be swaged, peened, stacked, or otherwise permanently deformed. 5 Licensed by Information Handling ServicesGGG-B-500 C 3.7 Shell plates. Shell plates shall be steel conforming to ASTM A36. The Plates shell plates shall fully shield the sheave and shall
30、have smooth edges. shall be held in position with bolts, nuts, and pins to prevent distortion or spreading. Each block shall have the shell plates held together at the bottom with a minimum of three bolts with nuts, and tubing spacers; the center bolt shall extend through each strap piece. I I Type
31、I shell plates shall have an im- I l pression or indentation guard pressed into its side extending through a minimum of 180 degrees around the top of the shell in a manner to prevent the wire rope I from being jammed between the shell and the sheave. Type II shell plates shall I be diamond or oval p
32、attern as specified (see 6.2). 3.8 Straps. Straps shall be steel conforming to ASTM A675. Straps shall be two-piece construction and shall extend the full length of each shell plate. Straps shall be securely welded, riveted, or bolted to the shell plates in such a manner as to securely hold the shel
33、l plates in position and to add rigidity to the block assembly. The straps shall provide bearing support for the center pin and connections to transmit loads from the sheave to the fittings. 3.9 Sheaves. Sheaves shall be cast steel conforming to ASTM A148, grade shall be as specified in table I and
34、shall be designed to prevent cutting action on the rope. The rim and tread section shall be grooved to fit the contour of the rope under load conditions. The sheaves shall be concentric with the bore, and shall be designed so that only the hubs bear against the shells. Side play shall not exceed 0.1
35、25 inch. Sheaves shall rotate freely when rotated by hand. I 80-40, and shall have a minimum hardness of Rockwell 34. Sheave groove depth 3.10 Center pin. Center pin shall be cold drawn medium carbon steel having The center pin shall be fitted with key head and a carbon content of 0.25 to 0.50 perce
36、nt. The center pin shall be locked in position to prevent rotation. hex nut with cotter key. When specified (see 6.21, .grease channels shall be drilled through the pin and a lubricating fitting shall be recessed into the head of the pin to provide lubrication of the bearing surfaces. Lubrication fi
37、ttings shall conform to MS15003. surfaces shall not exceed 63 microinches determined in accordance with ANSI B46.1. Surface roughness of center pin bearing 3.11 Fittings. Fittings shall be forged medium carbon steel having a carbon content of 0.25 to 0.50 percent, and shall swivel freely through 360
38、O. 3.12 Galvanizing. All metal surfaces of blocks except bearing surfaces shall be hot dipped galvanized in accordance with ASTM A153. 3.13 Identification marking. The blocks shall be identified in accordance with MIL-STD-130. Marking shall be permanently and legibly stamped on a shell plate indicat
39、ing the SWL, size of wire rope to be used with the block, and the manufacturers code. 6 Licensed by Information Handling ServicesGGG-B-500 C 3.14 Type I blocks. Type I blocks shall be as shown in figure 1 (see 6.41, The locking device and shall conform to the requirements specified in table I, shall
40、 be locked into position when the fittings and crosshead are rotated 90 from its normal load position. 3.14.1 Bearings. Bearings shall conform to MIL-B-5687, type I, composition A. 3.14.2 Fittings. Fittings shall be as specified (see 6.21, and shall be as shown on figures 1 and 2 (see 6.41. 3.15 Typ
41、e II blocks. Type II blocks shall be as shown in figure 3 (see 6.41, and shall conform to the requirements specified in table 11. supplied with a becket. Fittings shall be as specified (see 6.21, and shall be as shown on figures 3 and 4. Blocks shall be 3.15.1 Grade A, regular duty. Bearings for gra
42、de A blocks shall conform to MIL-B-5687;type 1, composition A. 3.15.2 Grade B, heavy duty. Bearings for grade B blocks shall be pressure lubricated, phospor-bronze. sheave with sufficient tightness to prevent slippage under any load. shall be delivered with a high grade of commercial lubricant. The
43、bearing shall be pressed into the hub of the Blocks 3.15.3 Style 1, single sheave. Style 1 blocks shall have a single sheave. 3.15.4 Style 2, double sheave. Style 2 blocks shall have two sheaves. 3.15.5 Stvle 3. triDle sheave. Stvle 3 blocks shall have three sheaves. 3.16 Workmanship. The blocks sha
44、ll be free from any characteristics or defects that may render them unsuitable or inefficient for intended purposes. All parts of the assemblies shall be clean, free of dirt, sand, fins, pits, flux, and extraneous material. (Welding shall not be resorted to as a repair measure.) 4. QUALITY ASSURANCE
45、 PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract i. or purchase order, the contractor is responsible for the performance of all in- spection requirements as specified herein. contract or purchase order, the contractor may use his own or any other facilities u
46、nless disapproved by the Government. form any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed require- ments. Except as otherwise specified in the suitable for the performance of the inspection requir
47、ements specified herein, The Government reserves the right to per- 7 Licensed by Information Handling ServicesGGG-B-500C I 4.3.1 Examination. The first article block shall be examined as specified l in 4.5.1. Presence of one or more defects shall be cause for rejection. 4.1.1 Component and material
48、inspection. The contractor is responsible for insuring that components and materials used are manufactured, examined, and tested in accordance with referenced specifications and standards. 4,2 Classification of inspections. The inspection requirements specified herein are classified as follows: a. b
49、. c. First article inspection (see 4.3). Quality conformance inspection (see 4.4). Inspection of preparation for delivery (see 4.6). 4.3 First article inspection, 4.3.2 Tests. The first article block shall be tested as specified in 4.5.2.2. Failure of any test shall be cause for rejection. 4.4 Quality -conformance inspection. 4.4.1 SamDling:. 4.4.1.1 For examination and proof load test. Sampling for examination and proof load test shall be in accordance with MIL-STD-105. 4.4.1.2 For ultimate test. One block assembly shall be selected at random from each lot. 4.4.2 Examinat
