1、BRITISH STANDARD BS 7823-1: 1995 ISO 11687-1: 1995 Pedestal plain bearings Part 1: Specification for pillow blocksBS7823-1:1995 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of the Standards Board and comesintoeffect o
2、n 15 July 1995 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference MCE/12 Draft for comment 92/79414 DC ISBN 0 580 24381 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee MCE/
3、12, Plain bearings, upon which the following bodies were represented: Association of Bronze and Brass Founders British Plastics Federation Copper Development Association Institution of Diesel and Gas Turbine Engineers Institution of Mechanical Engineers Society of Motor Manufacturers and Traders Ltd
4、. Amendments issued since publication Amd. No. Date CommentsBS7823-1:1995 BSI 10-1999 i Contents Page Committees responsible Inside front cover National foreword ii 1 Scope 1 2 Normative references 1 3 Types of pillow block 1 4 Dimensions 2 5 Shaft design 2 6 Materials 2 7 Design 2 8 Designation 2 F
5、igure 1 Examples of pillow blocks Size range 9 to 28 3 Figure 2 Examples of pillow blocks Size range 35 to 71 5 Figure 3 Shaft design for non-locating (free) bearing (thrust bearing part Q) 7 Figure 4 Shaft design for fixed bearing (thrust bearing parts A, B and K) 7 Table 1 Pillow blocks Size range
6、 9 to 28 4 Table 2 Pillow blocks Size range 35 to 71 6 Table 3 Shaft dimensions Size range 9 to 28 8 Table 4 Shaft dimensions Size range 35 to 71 9 List of references Inside back coverBS7823-1:1995 ii BSI 10-1999 National foreword This British Standard has been prepared by Technical Committee MCE/12
7、. It is identical withISO11687-1:1995 Plain bearings Pedestal plain bearings Part 1: Pillow blocks, published by the International Organization for Standardization (ISO). The Technical Committee has reviewed the provisions ofISO185:1988, ISO 426-1:1983,ISO426-2:1983,ISO630:1980,ISO683-11:1987, ISO27
8、68-1:1989,ISO2768-2:1989,ISO3755:1991,ISO4381:1991, ISO12129-1 andISO12129-2 to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contract
9、. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard ISO 1302:1992 BS 308 Engineering drawing practice Part 2:19
10、72 Recommendations for dimensioning (Technically equivalent) ISO 8602:1994 BS 6615:1985 Specification for dimensional tolerances for metal and metal alloy castings (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 to 10, an inside back
11、cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS7823-1:1995 BSI 10-1999 1 1 Scope This part ofISO11687 specifies design characteristics for pillow blocks fo
12、r size ranges9to28and35to71, as well as design characteristics for shafts. It is applicable to pillow blocks used mainly in electrical and turbo engineering industries. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of t
13、his part ofISO11687. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part ofISO11687 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Memb
14、ers of IEC and ISO maintain registers of currently valid International Standards. ISO 185:1988, Grey cast iron Classification. ISO 426-1:1983, Wrought copper-zinc alloys Chemical composition and forms of wrought products Part 1: Non-leaded and special copper-zinc alloys. ISO 426-2:1983, Wrought copp
15、er-zinc alloys Chemical composition and forms of wrought products Part 2: Leaded copper-zinc alloys. ISO 630:1980, Structural steels. ISO 683-11:1987, Heat-treatable steels, alloy steels and free-cutting steels Part 11: Wrought case-hardening steels. ISO 1302:1992, Technical drawings Method of indic
16、ating surface texture. ISO 2768-1:1989, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications. ISO 2768-2:1989, General tolerances Part 2: Geometrical tolerances for features without individual tolerance indications. ISO 3755:1991, Cast carb
17、on steels for general engineering purposes. ISO 4381:1991, Plain bearings Lead and tin casting alloys for multilayer plain beatings. ISO 8062:1994, Castings System of dimensional tolerances and machining allowances. ISO 12129-1:, Plain beatings Part 1: Fits 1) . ISO 12129-2:, Plain beatings Part 2:
18、Tolerances on form and position and surface roughness for shafts, flanges and thrust collars 1) . 3 Types of pillow block According to their design, pillow blocks can be devised as follows, each characteristic being designated by a letter symbol. Housing: Heat dissipation: Shape of bore for journal
19、bearing and type of lubrication: Thrust bearing: Seal: Type and dimensions subject to agreement Figure 1 andFigure 2 show examples of pillow blocks. These represent pillow blocks, which are ready to be installed, in the size ranges9to28and35to71, respectively. The symbols aboveFigure 1 andFigure 2 e
20、xplain only the type illustrated; the complete type required shall be specified in the above-mentioned sequence when ordering. 1) To be published. G Pillow block, without cooling fins R Pillow block, with cooling fins N Natural cooling W Water cooling in oil sump U Circulation pump and natural cooli
21、ng T Circulation pump and water cooling in oil sump Z Recirculating oil lubrication with external cooling of oil C Circular cylindrical bore without oil ring L Circular cylindrical bore with split oil ring not fixed on a rotating shaft Y Lobed bearing with two sliding surfaces without oil ring V Lob
22、ed bearing with four sliding surfaces without oil ring Q Without sliding surfaces non-locating (free) bearing B Plain sliding surfaces with oil grooves (guide bearing) K Wedge surfaces (design and dimensions at the manufacturers discretion) A Tilting pads BS7823-1:1995 2 BSI 10-1999 For reasons of d
23、esign (e.g. on account of limited space) and economy, it is only possible to construct the size range35to71with thrust bearings (A) with the dimensions given inTable 3. 4 Dimensions SeeFigure 1 toFigure 4 andTable 1 toTable 4. The pillow blocks are not expected to conform to the designs illustrated
24、inFigure 1 andFigure 2; compliance is only required with respect to the dimensions specified. NOTE 1All dimensions are given in millimetres Details which are not specified shall be chosen as appropriate. 5 Shaft design SeeFigure 3 andFigure 4 andTable 3 andTable 4. 6 Materials Housing: Grade300in ac
25、cordance withISO185; other materials subject to agreement Half-bearing: Bearing back: Bearing metal: Lead-tin-alloy in accordance withISO4381, orsubject to agreement Seal: Copper alloy, aluminium alloy or plastic, subject to agreement Oil ring, not fixed on rotating shaft: Copper-zinc alloy in accor
26、dance withISO426, orsubject to agreement 7 Design General tolerances: For machined surfaces: ISO 2768-1 and ISO 2768-2 mH For unmachined surfaces: ISO 8062 CT 9 (for grade 300), or corresponding standards for other materials agreed upon. Surface roughness in accordance with ISO1302: Pillow block: Mo
27、unted surfaces: R a= 3,2 4m Sliding surfaces: R a= 0,8 4m Shaft: SeeTable 3 andTable 4, footnote 1. Housing: Pillow block housing with lifting eye bolts or means of conveyance at the manufacturers discretion. The inner surfaces of the housing shall be clean and shall have a coat of paint resistant t
28、o oil and solvents. The outer surfaces of the housing shall be protected against corrosion. For the purpose of pressure compensation, the individual oil spaces within the pillow block housing shall be connected to each other by means of appropriate openings above the oil level. All bearing housing c
29、onnections on both sides; other connecting dimensions and arrangements than those given inFigure 1 andFigure 2 as well as additional connections subject to agreement. Type of inspection plate at the manufacturers discretion. With two pull-off screws at housing base at the manufacturers discretion. W
30、ith bolts and screws for housing parts and seals, at the manufacturers discretion. Bolts and screws and dowel pins for the housing base do not form part of the delivery. General: Particular agreements shall be made for applications under special conditions (e.g. inclined positions). Chamfered edges:
31、 type of edge chamfering at the manufacturers discretion. If the bearing is only applicable to one direction of rotation, a directional arrow shall be provided. 8 Designation EXAMPLE Designation of a pillow block of size14, shaft diameter125mm, housing with cooling fins (R), for recirculating oil lu
32、brication with external cooling of oil (Z), circular cylindrical bore with split oil ring not fixed on a rotating shaft for emergency run (L) and thrust bearing with wedge surfaces (K): Pillow block ISO 11687-1 14 125 RZLK Fe 360 B in accordance withISO 630 Type of material at the manufacturers disc
33、retion C10 or C15 E 4 in accordance with ISO 683-11. 200 to 400 in accordance with ISO 3755 BS7823-1:1995 BSI 10-1999 3 Figure 1 Examples of pillow blocks Size range 9 to 28BS7823-1:1995 4 BSI 10-1999 Table 1 Pillow blocks Size range 9 to 28 (see Figure 1) Size 9 11 14 18 22 28 D H7 a 80 90 100 100
34、110 125 125 140 160 160 180 200 200 225 250 250 280 300 B b 60 80 105 135 170 215 b 1 80 100 125 160 200 250 b 2 145 165 205 245 310 370 b 3 190 205 255 300 380 450 b 4 150 170 215 255 320 380 d 1 (nominal dimension seal) 80 100 125 160 200 250 90 110 140 180 225 280 100 125 160 200 250 315 110 140
35、180 225 280 355 d 2 150 180 230 275 340 440 d 3 22 for M16 26 for M20 30 for M24 40 for M30 46 for M36 55 for M42 d 4 c 10,4 10,4 10,4 15,5 15,5 20,6 d 5 d G 3/8 G 3/8 G 3/8 G 1/2 G 3/4 G 3/4 d 6 d G 1 1/4 G 1 1/4 G 1 1/2 G 1 1/2 G 2 G 2 1/2 e 1 300 375 450 560 670 800 e 2 90 100 125 150 200 250 h 1
36、 190 225 265 315 375 450 h 2 325 380 460 565 680 830 h 3 35 50 60 70 80 90 l 1 355 450 540 660 800 950 l 2 215 280 340 440 540 650 l 3 28 30 40 50 60 85 k e(spherical) h6 190 212 280 335 425 530 a Applies only to circular cylindrical bores. b For the design with thrust bearing part (A), dimensions B
37、 may slightly deviate in order to obtain (depending on the type of tilting pad) a constant dimension b 1(interchangeability of the half-bearing shell). c Rough bore for pinned fitting. d If larger connections are necessary, this shall be the subject of a special agreement. e The fit of the half-bear
38、ing and housing shall be a transition fit or shall be subject to agreement. 0 05 , BS7823-1:1995 BSI 10-1999 5 Figure 2 Examples of pillow blocks Size range 35 to 71BS 7823-1:1995 6 BSI 10-1999 Table 2 Pillow blocks Size range 35 to 71 (see Figure 2) Size 35 45 56 71 D H7 a 300 315 335 355 375 400 3
39、75 400 425 450 475 500 475 500 530 560 600 630 600 630 670 710 750 800 B b 260 325 415 530 b 1 300 375 475 600 b 2 440 530 640 780 b 4 460 550 660 810 300 375 475 600 315 400 500 630 d 1 (nominal dimension seal) 335 425 530 670 355 450 560 710 375 475 600 750 400 500 630 800 425 530 670 850 560 710
40、900 d 2 520 660 800 985 d 3 55 for M42 62 for M48 62 for M48 66 for M56 d 4 c 20,5 20,5 25,5 25,5 d 5 d G 3/4 G 3/4 G 1 G 1 d 6 ) d G2 1/2 G2 1/2 G3 G3 e 1 950 1 150 1 400 1 800 e 2 e 150 200 e 3 e 300 355 450 560 h 1 530 600 670 750 h 2 940 1 135 1 280 1 515 h 3 95 120 130 160 l 1 100 1 350 1 600 2
41、 000 k f(spherical) h6 630 800 950 1 180 a Applies only to circular cylindrical bores. b For the design with thrust bearing part (A), dimension B may slightly deviate in order to obtain (depending on the type of tilting pad) a constant dimension b 1(interchangeability of the half-bearing shell). c R
42、ough bore for pinned fitting. d If larger connections are necessary, this shall be the subject of a special agreement. e Size range 35 and 45:6 plate screws; size range 56 and 71:8 plate screws. f The fit of the half-bearing and housing shall be a transition fit or shall be subject to agreement. 0 0
43、5 , BS7823-1:1995 BSI 10-1999 7 Figure 3 Shaft design for non-locating (free) bearing (thrust bearing part Q) Figure 4 Shaft design for fixed bearing (thrust bearing parts A, B and K)BS7823-1:1995 8 BSI 10-1999 Table 3 Shaft dimensions Size range 9 to 28 (see Figure 3 Figure 4) Size 9 11 14 18 22 28
44、 D a 80 90 100 100 110 125 125 140 160 160 180 200 200 225 250 250 280 300 b 5 b 0,1 80,4 100,4 125,4 160,4 200,4 250,4 b 6 100 120 150 190 240 300 b 7 c 90 110 140 180 220 280 b 8 100 120 150 190 240 300 b 9 d 5 6 8,5 10 13,5 19 d 7 Thrust bearing parts B, K 110 120 130 135 150 160 170 190 200 215
45、240 250 265 290 315 325 355 375 A 132 142 143 157 162 168 192 207 217 244 264 273 308 328 339 378 408 408 d 8 d 9 d 8 d 9 d 8 d 9 d 8 d 9 d 8 d 9 d 8 d 9 80 80 100 100 125 125 160 160 200 200 250 250 d 8; d 9 d 90 80 110 100 140 125 180 160 225 200 280 250 e8 100 90 125 110 160 140 200 180 250 225 3
46、15 280 110 100 140 125 180 160 225 200 280 250 355 315 d 10 90 100 110 110 125 140 140 160 180 180 200 225 225 250 280 280 315 315 r 1 e 2,5 2,5 4 4 6 6 r 2 e 4 4 6 6 10 10 a Limit deviations for shafts and tolerances of form and position and surface roughness in accordance with ISO 12129-1 and ISO
47、12129-2. b Normal axial clearance of 0,5 mm is provided for size range 9 to 28 and 0,6 mm for size range 35 to 71. If a change in direction of the axial loads or axial thrusts is to be expected, dimension b 5may be reduced by 0,2 mm for size range 9 to 28 and by 0,3 mm for size range 35 to 71. If a
48、fixed bearing (thrust bearing parts B, K) is only needed for the test run, dimension b 5may be increased. c If the non-locating (free) bearing (thrust bearing part Q) has to allow major axial movements (e.g. due to thermal expansion or large constitutional axial clearance), dimension b 7may be incre
49、ased. d The clearance groove d 9may be omitted if it is equal to or smaller than the shaft diameter D. e The radii r 1and r 2may be replaced by an undercut.BS 7823-1:1995 BSI 10-1999 9 Table 4 Shaft dimensions Size range 35 to 71 (see Figure 3 and Figure 4) Size 35 45 56 71 D a 300 315 335 355 375 400 375 400 425 450 475 500 475 500 530 560 600 630 600 630 670 710 750 800 b 5 b 0,1 300,5 375,5 475,5 600,5 b 6 360 445
