DLA A-A-59658 B-2011 BEARINGS ROLLER TAPERED DOUBLE ROW STRAIGHT BORE TWO SINGLE CONES WITH CONTACTING FRONT FACES SLOTTED AND CHAMFERED FOR LUBRICATION ONE DOUBLE CUP WITH LUBRICA.pdf
《DLA A-A-59658 B-2011 BEARINGS ROLLER TAPERED DOUBLE ROW STRAIGHT BORE TWO SINGLE CONES WITH CONTACTING FRONT FACES SLOTTED AND CHAMFERED FOR LUBRICATION ONE DOUBLE CUP WITH LUBRICA.pdf》由会员分享,可在线阅读,更多相关《DLA A-A-59658 B-2011 BEARINGS ROLLER TAPERED DOUBLE ROW STRAIGHT BORE TWO SINGLE CONES WITH CONTACTING FRONT FACES SLOTTED AND CHAMFERED FOR LUBRICATION ONE DOUBLE CUP WITH LUBRICA.pdf(8页珍藏版)》请在麦多课文档分享上搜索。
1、Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to: STDZNMGTdla.mil or DLA Aviation VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616. Since contact information can change, you may want to verify the
2、 currency of this address information using the ASSIST database at https:/assist.daps.dla.mil/. FSC 3110 INCH-POUND A-A-59658B 8 September 2011 SUPERSEDING A-A-59658A 22 May 2006 COMMERCIAL ITEM DESCRIPTION BEARINGS, ROLLER, TAPERED, DOUBLE ROW, STRAIGHT BORE, TWO SINGLE CONES WITH CONTACTING FRONT
3、FACES SLOTTED AND CHAMFERED FOR LUBRICATION, ONE DOUBLE CUP WITH LUBRICATION HOLES AND GROOVE (TYPE TNASW) The General Services Administration has authorized the use of this commercial item description for all federal agencies. 1. SCOPE. This commercial item description (CID) covers government acqui
4、sition requirements for complete (cone with rollers and cup) double row, tapered, roller bearings with straight bore, two single cones with contacting front faces slotted and chamfered for lubrication, one double cup with lubrication holes and groove (type TNASW) for general purpose use. These beari
5、ngs are not intended for use in special precision applications such as on aircraft, precision ordnance, or submarine equipment. 2. CLASSIFICATION. The roller bearings shall be of one type (TNASW) and classified by the size codes listed in table I. The column headings in table I refer to bearing char
6、acteristics defined in figure 1. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59658B 2 FIGURE 1. Bearing characteristics. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3A-A-59658B TABLE I. Si
7、ze codes and dimensions. Size code Part number 1d D T B R 2r 2d aD aK factor Basic dynamic load ratings (lb.) Bore Outside diameter Overall width Overall cup width Max. shaft fillet radius Max. housing fillet radius Recommended shoulder diameter Cone-cup Shaft Housing Two row radial 001 NA26118-SW -
8、 26284D 1.1806 2.8338 1.6835 1.4375 0.06 0.03 1.56 2.56 1.62 16300 002 NA3780-SW - 3729D 2.0000 3.6718 2.5625 2.0625 0.14 0.03 2.52 3.46 1.73 33700 003 NA455-SW - 452D 2.0000 4.2500 2.5625 2.1250 0.14 0.03 2.56 3.94 1.74 37400 004 NA558-SW - 552D 2.3750 4.8750 3.1250 2.5000 0.14 0.06 2.99 4.53 1.69
9、52600 005 NA643-SW - 632D 2.7500 5.3750 3.7500 3.0000 0.14 0.06 3.39 4.92 1.61 64200 006 NA484-SW - 472D 2.7559 4.7244 2.5626 2.1250 0.14 0.03 3.27 4.49 1.52 39600 007 NA759-SW - 752D 3.5000 6.3750 4.1250 3.3750 0.14 0.06 4.17 5.91 1.71 89800 008 NA691-SW - 672D 4.0000 6.6250 3.6250 2.7500 0.14 0.03
10、 4.65 6.30 1.24 68200 009 NA67791-SW - 67720CD 7.0000 9.7500 4.0625 3.3125 0.14 0.03 7.64 9.95 1.33 66800 1Part numbers are for reference only. Part numbers reflect the cup and cone numbers used by industry and the ABMA. Some cones and cups may be used in multiple configurations and are not limited
11、to one bearing assembly. 2These maximum fillet radii shall be cleared by the bearing corners. 3Minus value indicates load center inside cone backface. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59658B 4 3. SALIENT CHARACTERISTICS 3.1 Dimensi
12、ons. Bearing dimensions (and dynamic load ratings, see 3.4) shall conform to the requirements specified in table I for each of the bearing part numbers. The listed dimensions conform to the requirements specified in American Bearing Manufacturers Association (ABMA) Standard 19.2, “Tapered Roller Bea
13、rings - Radial Inch Design“. The bearing size shall be specified in the acquisition order (see 7.3(b). For any unlisted bearing size codes, the associated dimensional and dynamic load rating requirements should also be specified in the acquisition order. 3.2 Materials. 3.2.1 Cones (inner rings), cup
14、s (outer rings), and rollers. The bearing cones, cups, and rollers shall be made of case carburized or through-hardened steel produced in accordance with the ASTM International (ASTM) A295/A295M, “Standard Specification for High-Carbon Anti-Friction Bearing Steel“, or ASTM A534, “Standard Specificat
15、ion for Carburizing Steels for Anti-Friction Bearings“. The steel shall show a fine fracture grain size in accordance with ASTM E112, “Standard Test Methods for Determining Average Grain Size“. Material hardness shall be no less than Rockwell hardness number of 58 on Rockwell C scale (HRC) and no mo
16、re than 64 HRC as defined in ASTM E18, “Standard Test Methods for Rockwell Hardness of Metallic Materials“. 3.2.2 Cage. The bearing cage material shall be impervious to deterioration from any lubricant, preservative, solvent, or other chemical substance expected to contact the bearing during normal
17、use or storage. Similarly, the material shall not cause any chemical deterioration of any other bearing component. The cages shall be made from carbon steel (one piece stamped). Materials shall operate from -65 to 230 F (-53.9 to 110 C). 3.3 Tolerance class. The tolerance limits for bearings shall c
18、onform to tolerance class 4 as tabulated in ABMA Standard 19.2. Allowable tolerances for bearing components and assembled bearings are listed in tables II through V. TABLE II. Cone bore tolerance. Cone bore (d) Size range Tolerance Over Inclusive Plus Minus 0.0000 3.0000 5 0 3.0000 6.0000 10 0 Note:
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