1、BRITISH STANDARD BS ISO 6194-1:2007 Rotary shaft lip-type seals incorporating elastomeric sealing elements Part 1: Nominal dimensions and tolerances ICS 23.100.60; 83.140.50 BS ISO 6194-1:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 3
2、1 March 2008 BSI 2008 ISBN 978 0 580 53181 1 National foreword This British Standard is the UK implementation of ISO 6194-1:2007. It supersedes BS 7780-1:1994 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee MCE/11, Fluid seals and their housings. A li
3、st of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from le
4、gal obligations. Amendments/corrigenda issued since publication Date Comments Reference number ISO 6194-1:2007(E)INTERNATIONAL STANDARD ISO 6194-1 Second edition 2007-09-15 Rotary shaft lip-type seals incorporating elastomeric sealing elements Part 1: Nominal dimensions and tolerances Bagues dtanchi
5、t lvres pour arbres tournants incorporant des lments dtanchit en lastomre Partie 1: Dimensions nominales et tolrances BS ISO 6194-1:2007ii iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Symbols . 1 5 Seal types and examples . 2 5.1 Se
6、al outside-diameter construction 2 5.2 Sealing lip arrangements . 2 6 Pressure and nominal dimensions . 3 6.1 Pressure. 3 6.2 Nominal dimensions. 3 7 Shafts . 4 7.1 Shaft ends 4 7.2 Diametral tolerance. 5 7.3 Surface roughness and hardness. 6 8 Housings 6 8.1 Dimensions 6 8.2 Housing-bore tolerance
7、7 8.3 Housing-bore surface roughness . 7 9 Seal tolerances 7 9.1 Seal width 7 9.2 Seal outside diameter. 8 10 Size identification code 9 11 Identification statement 9 Annex A (informative) Seal specification. 10 Bibliography . 13 BS ISO 6194-1:2007iv Foreword ISO (the International Organization for
8、Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the r
9、ight to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Internation
10、al Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as
11、 an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. IS
12、O 6194-1 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 7, Sealing devices. This second edition cancels and replaces the first edition (ISO 6194-1:1982), which has been technically revised. ISO 6194 consists of the following parts, under the general title Rotary
13、 shaft lip-type seals incorporating elastomeric sealing elements: Part 1: Nominal dimensions and tolerances Part 2: Vocabulary Part 3: Storage, handling and installation Part 4: Performance test procedures Part 5: Identification of visual imperfections BS ISO 6194-1:2007v Introduction Rotary shaft l
14、ip-type seals are used to retain fluid, e.g. lubricant, in equipment where the differential pressure is relatively low. Typically the shaft rotates, and the housing is stationary, although in some applications the shaft is stationary, and the housing rotates. Dynamic sealing is normally the result o
15、f a designed interference-fit between the shaft and a flexible element incorporated in the seal. Similarly, a designed interference-fit between the outside diameter of the seal, and the diameter of the housing bore, retains the seal and prevents static leakage. Careful storage, handling, and proper
16、installation of all seals are necessary to avoid hazards, both prior to and during installation, which would adversely affect service life. BS ISO 6194-1:2007blank1 Rotary shaft lip-type seals incorporating elastomeric sealing elements Part 1: Nominal dimensions and tolerances 1 Scope This part of I
17、SO 6194 describes seals utilising elastomeric sealing elements. They are considered suitable for use under low-pressure conditions (see 6.1). This part of ISO 6194 shows seal types and examples. It also specifies the nominal dimensions and tolerances of the seals, shafts and housings, as well as a d
18、imensional identification code. NOTE ISO 6194 is complementary to ISO 16589 which covers seals incorporating thermoplastic sealing elements. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited
19、applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 286-2, ISO system of limits and fits Part 2: Tables of standard tolerance grades and limit deviations for holes and shafts ISO 5598, Fluid power systems and components Vocabulary IS
20、O 6194-2, Rotary shaft lip-type seals Part 2: Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 5598 and ISO 6194-2 apply. 4 Symbols The symbols used in this part of ISO 6194 are as follows: a housing-bore depth; d nominal inside diameter of
21、 the inner case; b nominal seal width; c housing chamfer length; BS ISO 6194-1:20072 D 1nominal diameter of the shaft to be used with the seal; d mminor diameter at the shaft lead-in chamfer; D 2nominal diameter of the housing bore and outer diameter of the seal; r housing corner radius. 5 Seal type
22、s and examples 5.1 Seal outside-diameter construction The constructions shown in Figure 1 show four basic types. Type 1 Type 2 Type 3 Type 4 Metal-cased Metal-cased with inner case Semi-rubber-covered metal-cased Rubber-covered metal-cased NOTE Because of some variations in design details, or seals
23、made by different manufacturers, the constructions shown are intended only to be representative of the basic types. Figure 1 Four basic types of outside-diameter construction 5.2 Sealing lip arrangements Examples of sealing lip arrangements are shown in Figure 2. a) Single lip b) Single lip with pro
24、tection lip Figure 2 Sealing lip arrangements BS ISO 6194-1:20073 The sealing lip arrangements shown in Figure 2 can be used with each seal outside-diameter construction shown in Figure 1. Hydrodynamic aids on the main lip may be incorporated by some manufacturers in certain applications. The design
25、 of the sealing lip should be agreed between the manufacturer and purchaser. NOTE In view of some variations in design detail, or seals made by different manufacturers, the constructions shown are intended only as representative examples of the basic types. 6 Pressure and nominal dimensions 6.1 Pres
26、sure Seals of this type are normally used with atmospheric pressure on the air side, and sealing fluids at pressures from 0 kPa to 30 kPa (0,3 bar) above atmospheric pressure. The user should consult the seal manufacturer regarding use at other pressures. 6.2 Nominal dimensions The nominal dimension
27、s of the seals are shown in Figure 3 and given in Table 1. Key D 1nominal diameter of the shaft to be used with the seal D 2nominal diameter of the housing bore and outer diameter of the seal b nominal seal width aAir side. bFluid side. Figure 3 Seal BS ISO 6194-1:20074 Table 1 Nominal dimensions Di
28、mensions in millimetres D 1D 2b aD 1D 2b aD 1D 2b aD 1D 2b a6 16 7 25 52 7 45 65 8 120 150 12 6 22 7 28 40 7 50 65 8 130 160 12 7 22 7 28 47 7 50 72 8 140 170 15 8 22 7 28 52 7 55 72 8 150 180 15 8 24 7 30 42 7 55 80 8 160 190 15 9 22 7 30 47 7 60 80 8 170 200 15 10 22 7 30 52 7 60 85 8 180 210 15 1
29、0 25 7 32 45 8 65 85 10 190 220 15 12 24 7 32 47 8 65 90 10 200 230 15 12 25 7 32 52 8 70 90 10 220 250 15 12 30 7 35 50 8 70 95 10 240 270 20 15 26 7 35 52 8 75 95 10 260 300 20 15 30 7 35 55 8 75 100 10 280 320 20 15 35 7 38 55 8 80 100 10 300 340 20 16 30 7 38 58 8 80 110 10 320 360 20 18 30 7 38
30、 62 8 85 110 12 340 380 20 18 35 7 40 55 8 85 120 12 360 400 20 20 35 7 40 62 8 90 120 12 380 420 20 20 40 7 42 55 8 95 120 12 400 440 20 22 35 7 42 62 8 100 125 12 450 500 25 22 40 7 45 62 8 110 140 12 480 530 25 22 47 7 25 40 7 25 47 7 ab may be increased to permit the use of more complex seal con
31、figurations. 7 Shafts 7.1 Shaft ends The end of the shaft shall be provided with a lead-in chamfer as shown in Figure 4 and given in Table 2 and shall be free from burrs, sharp edges or rough machining marks. BS ISO 6194-1:20075Key d mminor diameter at the shaft lead-in chamfer D 1nominal diameter o
32、f the shaft to be used with the seal Figure 4 Shaft lead-in chamfer Table 2 Shaft lead-in chamfer Dimensions in millimetres Shaft diameter Shaft diameter D 1d mmax. D 1d mmax. D 1u 10 D 1 1,5 50 D 1u 70 D 1 4,0 10 D 1u 20 D 1 2,0 70 D 1u 95 D 1 4,5 20 D 1u 30 D 1 2,5 95 D 1u 130 D 1 5,5 30 D 1u 40 D
33、 1 3,0 130 D 1u 240 D 1 7,0 40 D 1u 50 D 1 3,5 240 D 1u 480 D 1 11,0 Assembly tools are specified in ISO 6194-3 and should be used to ensure that the sealing lip is not damaged. If a radius is used instead of a lead-in chamfer, its value shall be between 1,8 mm and 3,0 mm. 7.2 Diametral tolerance Th
34、e shaft shall have a diametral tolerance not greater than h11 (see ISO 286-2). BS ISO 6194-1:20076 7.3 Surface roughness and hardness 7.3.1 Surface roughness The seal contact surface of a ground shaft shall be finished to a surface roughness, measured in the axial direction of between Ra 0,2 m and R
35、a 0,5 m, and between Rz 1,2 m and Rz 3,0 m. Some surface finish processes will not provide roughness values that fall within the limits given in this part of ISO 6194. Surface roughness requirements shall be determined between the manufacturer of the surface and the seal supplier. The seal contact s
36、urface shall normally be free of machining leads. Ground and polished shafts may require other grades of surface texture, in which case they should be subject to agreement between the manufacturer and user. Exceptional service conditions may necessitate the selection of other grades of surface textu
37、re, in which case they should be subject to agreement between the manufacturer and user. 7.3.2 Surface hardness Unless otherwise agreed on between the manufacturer and user, the surface hardness of the shaft should be a minimum of 30 Rockwell C. If the shaft could be subject to damage during handlin
38、g, this should be increased to 45 Rockwell C. 8 Housings 8.1 Dimensions 8.1.1 Where the housing is a rigid fully machined ferrous part, the housing bore shall conform to 8.2 and 8.3. 8.1.2 The housing bore shall be provided with a lead-in chamfer, free from burrs, as shown in Figure 5 and specified
39、in Table 3. 8.1.3 The housing-bore depth and corner radius shall be as shown in Figure 5 and specified in Table 3. If the housing is not in accordance with 8.1.1 to 8.1.3 (e.g. non-ferrous or non-metallic material, pressing of ferrous or non-ferrous material), the dimensions, tolerances and lead-in
40、configuration should be agreed between the purchaser and manufacturer. BS ISO 6194-1:20077Figure 5 Housing bore Table 3 Housing-bore dimensions Dimensions in millimetres Nominal seal width Minimum housing bore depth Chamfer length Maximum housing-bore corner radius b a c r u 10 b + 1,2 0,7 to 1 0,5
41、10 b + 1,5 1 to 1,3 0,75 8.2 Housing-bore tolerance The housing bore shall have a diametral tolerance not greater than H8 (see ISO 286-2). 8.3 Housing-bore surface roughness The surface roughness of the housing bore, measured in the axial direction, shall be between Ra 1,6 m and Ra 3,2 m, and betwee
42、n Rz 6,3 m and Rz 12,5 m. No visible surface imperfections are allowed. The housing-bore surface roughness may require lower values when metal cased seals are used, in which case they should be subject to agreement between the manufacturer and user. 9 Seal tolerances 9.1 Seal width The recommended s
43、eal width tolerances are listed below in Table 4. BS ISO 6194-1:20078 Table 4 Seal width tolerance Dimensions in millimetres Nominal seal width Tolerance b b u 10 0,3 10 b u 14 0,4 14 b u 18 0,5 18 b u 25 0,6 9.2 Seal outside diameter To provide an interference-fit between the seal outside surface a
44、nd the housing-bore surface, the recommended tolerances for the outside diameter of the seal shall be as shown in Table 5. The seal outside diameter tolerances in Table 5 are to be used for ferrous housings only. If non-ferrous housing materials are used, the seal manufacturer shall be consulted. Th
45、e seal manufacturer provides the proper recommendations regarding the interference fit between the seal and the non-ferrous housing. NOTE Since the interference between the seal outside surface and the housing-bore surface is a characteristic related to the design of the seal, it may be necessary fo
46、r agreement to be reached between the purchaser and manufacturer on the limits to be used. See Annex A for the recommended form. Table 5 Seal outside-diameter tolerances Dimensions in millimetres unless otherwise specified Nominal outside diameter Diametral tolerance Roundness tolerance aD 2Metal ca
47、sed Rubber covered b, cMetal cased Rubber covered D 2u 50 + 0,20 + 0,30 + 0,08 + 0,15 0,18 0,25 50 D 2u 80 + 0,23 + 0,35 + 0,09 + 0,20 0,25 0,35 80 D 2u 120 + 0,25 + 0,35 + 0,10 + 0,20 0,3 0,5 120 D 2u 180 + 0,28 + 0,45 + 0,12 + 0,25 0,4 0,65 180 D 2u 300 + 0,35 + 0,45 0,8 + 0,15 + 0,25 0,25 % of ou
48、t- side diameter 300 D 2u 530 + 0,45 + 0,55 1 + 0,20 + 0,30 0,25 % of out- side diameter BS ISO 6194-1:20079 aThe roundness tolerance is equal to the difference between the maximum diameter and the minimum diameter derived from three or more equally spaced measurements. bRubber-covered and semi-rubb
49、er-covered seals having a wave-profile outside surface are acceptable but will require different tolerances, to be agreed upon between the manufacturer and purchaser. cRubber-covered and semi-rubber-covered seals employing certain materials other than nitrile may require different tolerances, to be agreed upon between the manufacturer and purchaser. 10 Size identification code The size identif
