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1、Beneficial comments, recommendations, additions, deletions, clarifications, and any other data that may improve this document should be sent by letter to: Defense Supply Center, Columbus, Attn: DSCC-VAI, 3990 E. Broad Street, Columbus, OH 43213-5000. FSC 2530 INCH-POUND A-A-59494 September 17, 1999
2、COMMERCIAL ITEM DESCRIPTION WHEELS AND HUBS FOR INDUSTRIAL PNEUMATIC TIRES The General Services Administration has authorized the use of this commercial item description (CID) for all federal agencies as a replacement for wheels and type I and II hubs of MIL-W-8005E(2) and related associated specifi
3、cations MS24322A, MS24323B, MS24324C, MS24325C, MS24326B, MS24327B, MS24328B, MS24329B, and MS24330B. 1. SCOPE. This CID covers wheels and hubs, with or without industrial pneumatic tires and tubes (see 7.1). The hubs covered herein are of the cantilever or fork mounting types. 2. CLASSIFICATION. Th
4、e hub types with their associated sizes of wheels, tires, and tubes are as follows: Type I Cantilever mounting Tire sizes: 3.50-6, 4.00-8, 6.00-9, 7.50-10, and 9.00-10 Type II Fork mounting Tire sizes: 3.50-6, 4.00-8, 6.00-9, and 7.50-10 3. SALIENT CHARACTERISTICS. 3.1 Configuration. Wheel and hub a
5、ssemblies shall conform to the types shown on figure 1 and shall interface with and provide the capabilities specified in table I. A-A-59494 2 TABLE I. Industrial tires, loads, and inflation pressures. 1/ On paved roadOff-road 3/ Tire size (TRA) Ply rating Valve hole location TRA rim contour Tire OD
6、, inches 5 MPH10 MPH50 MPH10 MPH number(approx.)Load rating, lbs. 2/ Infl. press. psi Load rating, lbs. 2/ Infl. press. psi Load rating, lbs. 2/ Infl. press. psi Load rating, lbs. 2/ Infl. press. psi 3.50-6 4Center3-1/4 I13590 80490 75295 65220 30 4.00-8 6Center3-3/4 I161,090100950100570 85370 30 6.
7、00-9109/16 inch offset4.00 E212,2901001,9901001,175 95780 30 7.50-10101 inch offset5.50 F253,520 952,860 851,620 751,230 30 9.00-10 4/101 inch offset5.50 F284,270 803,580 752,000 651,655 30 NOTES: 1/Table I is based on the recommendations of The Tire and Rim Association, Inc (TRA). Worst case condit
8、ions of use, not average conditions, should be used in tire selection. For given conditions of use, loads below the load rating specified permit use of lower inflation pressures and hence affords an increase in flotation. 2/Loads specified apply to both ferrous and aluminum alloy wheels. 3/No tire s
9、maller than size 6.00-9 should be used as the main wheels for equipment to be used in unpaved areas. The use of sizes 3.50-6 and 4.00-8 should be limited to auxiliary wheels. 4/Ferrous wheels and hubs only. A-A-59494 3 3.2 Performance. 3.2.1 Pressure loads. Wheels, when mounted with tires and tubes,
10、 shall not deform when the tires and tubes are subjected to the inflation pressure specified in table II. TABLE II. Minimum wheel deformation inflation pressure. SizePly ratingInflation pressure, psi 3.50-64-ply140 4.00-86-ply175 6.00-910-ply175 7.50-1010-ply175 9.00-1010-ply175 3.2.2 Static loads.
11、Wheels, when mounted with tires and tubes and mounted to applicable hubs, shall withstand the maximum static loads specified in table III. TABLE III. Wheel maximum static loads. Wheel sizeTire inflation, psi Maximum static load, lbs. (at each wheel) 3.50-6802,500 4.00-81005,000 6.00-91006,250 7.50-1
12、09510,000 9.00-108010,000 3.2.3 Towing. Wheel and hub assemblies shall be capable of being moved by hand or towed by a tug over concrete pavement in a circular path having a 35 foot radius (as measured to the outside of the wheels) for a minimum of one-half mile at speeds up to 15 miles per hour (mp
13、h) under the 10 percent overrated load condition for 5 mph specified in table I. 3.3 Materials. Wheels and hubs shall be made out of steel, iron, or aluminum alloy as specified on figures 2 through 9. These materials, which are subject to deterioration when exposed to climatic and environmental cond
14、itions, shall be of corrosion-resistant type metal or shall be of metal that is protected against deterioration in a manner that will in no way prevent compliance with the requirements of this CID. The use of any protective coating that will crack, chip, or scale with age or extremes of climate and
15、environmental conditions shall be avoided. 3.4 Usage. The wheels and hubs shall be capable of being used as running gear on equipment that may be moved by hand or towed by a tug on paved areas, pierced plank areas, unpaved roads, and unimproved level terrain, whether such areas are dry, wet, or cove
16、red with up to 6 inches of snow or 4 inches of mud. 3.5 Construction. Wheel and hub assemblies shall be constructed so that no parts will work loose in service. 3.5.1 Wheels. Wheels shall be of the split-rim type, with all of the necessary bolts, lockwashers, and nuts required for assembly of the tw
17、o halves as shown on figures 2, 3, 4, and 5. The wheels shall allow removal of the wheel from the hub without deflating the tire. A-A-59494 4 3.5.2 Hubs. A hub shall consist of all the parts shown on figures 6, 7, 8, or 9, as applicable, including all bolts, nuts, and lockwashers for attaching the w
18、heel to the hub. All parts such as grease seals and hubcaps that are not specified in detail shall meet the requirements specified in 3.6. Axles are not a part of the hubs covered by this CID, and are shown in the figures for reference purposes only. 3.5.2.1 Bearing cup removal. Slots or other provi
19、sions shall be inside the hubs to facilitate removal of bearing cups. 3.5.2.2 Attachment bolts. Hub-to-wheel attachment bolts shall be of the sizes shown on the applicable figures and shall be ribbed-neck carriage bolts. The length of the ribbed part of the bolt shall be from the head to within 1/16
20、 inch of extending through the flange of the hub. Bolts shall be capable of being pressed out to allow for attachment of a brake mechanism to the hub body. 3.5.2.3 Seals. Seals for the hub as shown on figures 6 through 9 shall be standard grease seals of the molded, synthetic-rubber type. The seals
21、shall provide protection for the wheel bearings under the environmental conditions specified herein. 3.5.2.4 Brake drum pilot. Each type 1 cantilever mounting hub shall be provided with a brake drum pilot surface on the hub flange as shown on figures 6 and 7. 3.5.3 Threads. Unless other specified, a
22、ll threads shall conform to FED-STD-H28 (see 7.3). 3.6 Environmental conditions. The wheels and hubs shall be capable of withstanding exposure to the following environmental conditions: a.Temperatures from -65 to 125 F. b.Relative humidity of 955 percent at a temperature of 1255 F. c.Airborne sand a
23、nd dust particles incident to normal road operation. d.Atmosphere containing salt-laden moisture (a salt fog of 51 percent salt solution). 3.7 Tires and tubes. All industrial pneumatic-type tires and tubes furnished with the wheels shall conform to ZZ-T-410, except that tire size 7.50-10 shall be 10
24、-ply rating. Tire size 9.00-10 shall be used only with ferrous metal hubs and wheels. All tires shall have a free-rolling tread design, be of a non-directional type, and have multiple ribs. 3.7.1 Flaps. Unless otherwise specified (see 7.2), all 10-ply rating tires shall be equipped with flaps. 3.7.2
25、 Valve stem. The valve stem on the tube furnished with the tire shall conform to the appropriate TRA Standard (see 7.3) as indicated: Tire sizeTRA Standard 3.50-6TR 87 4.00-8TR 13 or TR 87 6.00-9 and 7.50-10TR 135 9.00-10TR 150 3.8 Finishes and protective coatings. 3.8.1 Color. Wheels and hubs shall
26、 be finished in the color specified in the contract or order (see 7.2). 3.8.2 Bearings, grease seals, enclosed parts, and utility parts. The bearings, grease seals, and enclosed parts and surfaces of the hub shall not be painted. The outside surface of the seals shall be painted or A-A-59494 5 plate
27、d in accordance with the applicable finishes specified above. Bearing cup bores shall not be finished. Utility parts (e.g., wheel mounting bolts) shall be masked or otherwise protected during painting of the hubs. 3.9 Workmanship. The wheels and hubs shall be fabricated and finished using commercial
28、ly acceptable workmanship standards. 3.9.1 Wheel surface. The surface of the wheel between bead seats shall be free of defects that would be injurious to the innertube and tire. 3.9.2 Flanges. The hub face and mating wheel faces shall be smooth and free from defects. 3.9.3 Register. The register bor
29、e of the wheel and register diameter of the hub shall be concentric and free from defects. The least clearance between these surfaces shall be maintained consistent with the applicable figures. 4. REGULATORY REQUIREMENTS 4.1 Recovered materials. The use of recovered materials is encouraged to the ma
30、ximum extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR) (see 7.3). 4.2 Toxic chemicals, hazardous substances, and ozone depleting chemicals (ODCs). The use of toxic chemicals, hazardous substances, or ODCs shall be avoided, whenever feasible. 5. QUAL
31、ITY ASSURANCE PROVISIONS. 5.1 Product conformance. The products provided shall meet the salient characteristics (see 3) of this CID, conform to the producers own drawings, specifications, standards, and quality assurance practices; and be the same product offered for sale in the commercial market. T
32、he government reserves the right to require proof of such conformance. 5.2 Market acceptability. The wheels and hubs (and tires and tubes, if procured as part of an assembly) must have been sold to the government or in the commercial market for a minimum of one year. 6. PACKAGING. 6.1 Preservation,
33、packing, packaging, and marking. Preservation, packing, packaging, and marking shall be as specified in the contract or order (see 7.2). 7. NOTES. 7.1 Intended use. Wheels and hubs covered by this CID are intended for use as standard components of mobile equipment used by the Department of Defense u
34、nder all extremes of climatic and environmental conditions. Users should consider the conditions expressed in 7.1.1 through 7.1.3 when selecting wheels and hubs. 7.1.1 Use with pneumatic casters. Where wheels and hubs are to be used as components of single-tired or dual-tired pneumatic casters, cant
35、ilever mounting should be used to facilitate wheel removal. 7.1.2 Fork mounting. Fork mounting of wheels and hubs will be used only when specified by the procuring activity. A-A-59494 6 7.1.3 Tire selection criteria. The TRA Yearbook (see 7.3) should be used as a guide for the selection of tire size
36、s for use on a specific item of mobile equipment, subject to the following: a. Conditions. Select for the worst expected conditions of use: generally, off-road, 10-mph conditions. b. Load rating. To ensure adequate flotation, use no more than 75 percent of the tire load rating in initial design. c.
37、Tire sizes. Use tire size 6.00-9, or larger, where equipment items must be mobile over pierced plank and level unpaved surfaces. (Size 6.00-9, 6-ply rating tires may be used in lieu of 6.00- 9, 10-ply rating tires where use of this rule results in under-loading of the tire). Use tire sizes 3.50-6 an
38、d 4.00-8 for two-wheel trailers and similar items, or where the equipment item is light in weight and will be moved only over paved surfaces. 7.1.4 Part identification number. The following part identification numbering procedure is for government purposes and does not constitute a requirement for t
39、he contractor. The part or identifying number (PIN) is made up of the basic CID number and a three-digit alphanumeric dash number. Example of PIN:AA59494- 1A1 Basic part number, always selected Hub designation (see table IV) Wheel designation (see table V) Tire designation (see table VI) Note: Table
40、 VII shows the conversion from the previously used MSXXXXX PIN to the PIN established under this CID. The national stock number (NSN) for the items procured under this CID is also shown. Tires and tubes are not separately procurable under this CID. Size 9.00-10 tire should be used only with ferrous
41、wheel and hub. 7.2 Ordering data. Acquisition documents must specify the following: a.Number, title, and date of this CID. b.Applicable PIN (see 7.1.4 and table VII), which covers: size; whether wheels, hubs, or both, are to be procured; whether tires and tubes are required with wheels; and whether
42、a cantilever-mounting or fork-mounting type hub is required. c.Whether tire flaps are not required with 10-ply rating tires (see 3.7.1). d.Color (see 3.8.1). The color to be specified will normally be either Yellow (color 13538), Green 383 (color 34094), Dark Green (color 24052), or Sand (color 3330
43、3) of FED-STD-595 (see 7.3). e.Preservation, packing, packaging, and marking requirements (see 6.1). 7.3 Source of documents. 7.3.1 The Federal Acquisition Regulation (FAR) may be obtained from the Superintendent of Documents, US Government Printing Office, Washington, D.C. 20402. A-A-59494 7 Table
44、IV. Hub designation. TypeFits wheel sizeMaterialDesignationFigure No hub ordered0 I3.50-6 or 4.00-8Steel, cast iron, or Aluminum alloy 16 6.00-9, 7.50-10, or 9.00-10Steel or iron27 6.00-9 or 7.50-10Aluminum alloy3 II3.50-6 or 4.00-8Steel, cast iron, or aluminum alloy 48 7.50-10 (with spacers)Steel,
45、cast iron, or59 6.00-9 (without spacers)aluminum alloy6 Table V. Wheel designation. SizeMaterialDesignationFigure No wheel ordered0 3.50-6SteelA2 Aluminum alloyB 4.00-8SteelC3 Aluminum alloyD 6.00-9SteelE4 7.50-10 or 9.00-10SteelF5 7.50-10Aluminum alloyG Table VI. Tire designation. Tire sizePly rati
46、ngDesignation No tire ordered0 3.50-641 4.00-862 6.00-963 6.00-9104 7.50-10105 9.00-10106 A-A-59494 8 Table VII. Former MSXXXXX PIN to CID A-A-59494 PIN conversion. Former MSXXXXX PIN CID PIN AA59494-NSN HubWheelTire MS24322-11A02530-000631358 MS24322-1A41A1none established MS24322-24A0none establis
47、hed MS24322-2A44A12530-006744824 MS24322-31C02530-000631359 MS24322-3A6 or 3A41C22530-008837623 MS24322-44C0none established MS24322-4A64C22530-011228340 MS24322-52/3E02530-000631361 MS24322-5A62/3E32530-007561210 MS24322-5A102/3E42530-009305193 MS24322-66E0none established MS24322-6A66E3none establ
48、ished MS24322-6A106E4none established MS24322-72/3F/G02530-012957168 MS24322-7A102/3F/G52530-014074862 MS24322085F/G0none established MS24322-8A105F/G5none established MS24322-92F02530-000631364 MS24322-9A102F6none established MS24323-10A02530-005292706 MS24323-20B0none established MS24324-10C025300
49、08824784 MS24324-20D0none established MS24325-10E02530-005287224 MS24326-10F02530-005902680 MS24326-20G0none established MS24327-11002530-004457593 MS24328-12002530-008930568 MS24328-23002530-006467705 MS24329-14002530-008970957 MS24330-1500none established MS24330-26002530-009302712 A-A-59494 9 7.3.2 Federal specifications, standards, and handbooks may be obtained from the Defense Automated Printing Service, DODSSP, Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094. ZZ-T-410-Tires, Pneumatic, Industrial FED-STD-H28-Screw-Thread Standards
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