1、BRITISH STANDARD BSISO 9982:1998 Belt drives Pulleys and V-ribbed belts for industrial applications PH, PJ, PK, PL and PM profiles: Dimensions ICS21.220.10BSISO9982:1998 This British Standard, having been prepared under the directionof the Engineering SectorBoard, was published underthe authority of
2、 the Standards Board and comes intoeffect on 15 September 1998 BSI 04-1999 ISBN 0 580 30356 X National foreword This British Standard reproduces verbatim ISO9982:1998 and implements it as the UK national standard. It supersedes BS7620:1993 which is withdrawn. The UK participation in its preparation
3、was entrusted to Technical Committee MCE/10, Belt and pulley drives, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; mo
4、nitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this do
5、cument may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of
6、 British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theISOtitle page, pageii, pages1to9 and a back
7、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. Amendments issued since publication Amd. No. Date CommentsBSISO9982:1998 BSI 04-1999 i Contents Page National foreword Inside
8、front cover Foreword ii Introduction 1 1 Scope 1 2 Normative references 1 3 Pulleys 1 4 Belts 5 Annex A (informative) Bibliography 9 Figure 1 Cross-section of pulley grooves 2 Figure 2 Pulley diameters 3 Figure 3 Determination of pitch diameter 5 Figure 4 Cross-section of belt 6 Figure 5 Measuring f
9、ixture to determine effective length 7 Table 1 Dimensions of pulley grooves 1 Table 2 Minimum effective diameter 3 Table 3 Groove-to-groove diameter variation 3 Table 4 Radial run-out 4 Table 5 Tolerance on the diameter over balls 4 Table 6 Belt dimensions 5 Table 7 Measuring pulleys and measuring f
10、orces 7 Table 8 Manufacturing tolerances for effective lengths of V-ribbed belts 8ii blankBSISO9982:1998 ii BSI 04-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International St
11、andards 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 right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also
12、 take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Internatio
13、nal Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO9982 was prepared by Technical Committee ISO/TC41, Pulleys and belts (including veebelts), Subcommittee SC1, Veebelts and grooved pulleys. This second edition cancels and replaces the first e
14、dition (ISO9982:1991), which has been technically revised. In particular, one subclause on the diameters over balls and another on the manufacturing tolerances for effective lengths of V-ribbed belts have been added. Annex A of this International Standard is for information only. Descriptors: Belt d
15、rives, pulleys, grooved pulleys, power transmission belts, V-belts, form specifications, dimensions, designation.BSISO9982:1998 BSI 04-1999 1 Introduction A V-ribbed belt drive is composed of an endless belt with a longitudinally ribbed traction surface which engages and grips, by friction, pulley g
16、rooves of similar shape. The belt ribbed surface fits the pulley grooves to make nearly total contact. 1 Scope This International Standard specifies the principal dimensional characteristics of V-ribbed pulley groove profiles, together with the corresponding endless V-ribbed belts, of PH, PJ, PK, PL
17、 and PM profiles which are used for general industrial applications. The PK belt was originally established for automotive accessory drive applications and ISO9981 deals specifically with that particular field. 2 Normative references The following standards contain provisions which, through referenc
18、e in this text, constitute provisions of this International Standard. At the time of the publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the
19、 most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO254:1998, Belts drives Pulleys Quality, finish and balance. ISO4287:1997, Geometrical product specification (GPS) Surface texture: Profile method Terms, de
20、finitions and surface texture parameters. 3 Pulleys 3.1 Groove dimensions and tolerances The groove dimensions of PH, PJ, PK, PL and PM belts are shown in Figure 1 and Figure 2, and given in Table 1. Table 1 Dimensions of pulley grooves Dimensions in millimetres Profile PH PJ PK PL PM Groove pitch,
21、e ab 1,6 0,03 2,34 0,03 3,56 0,05 4,7 0,05 9,4 0,08 Groove angle, c 0,5 40 40 40 40 40 r t min. 0,15 0,2 0,25 0,4 0,75 r b max. 0,3 0,4 0,5 0,4 0,75 Checking ball or rod diameter, d B 0,01 1 1,5 2,5 3,5 7 2x nom. 0,11 0,23 0,99 2,36 4,53 2N d max. 0,69 0,81 1,68 3,5 5,92 f min. 1,3 1,8 2,5 3,3 6,4 a
22、 The tolerance on e applies to the distance between the axes of two consecutive grooves. b The sum of all deviations from the nominal value e for all grooves in any pulley shall not exceed 0,3. c The centreline of the groove shall make an angle of90 0,5 with the axis of the pulley. d N is not relate
23、d to the nominal diameter of the pulley but is measured from the actual ride position of the ball or rod in the pulley.BSISO9982:1998 2 BSI 04-1999 Figure 1 Cross-section of pulley groovesBSISO9982:1998 BSI 04-1999 3 3.2 Minimum effective diameter The minimum recommended effective diameter, d e , fo
24、r V-ribbed pulleys is given in Table 2. Table 2 Minimum effective diameter 3.3 Tolerances on finished pulley 3.3.1 Checking conditions Profile, diameter and run-out tolerances shall be checked on the finished pulley without surface coating. 3.3.2 Groove-to-groove diameter tolerances The variation in
25、 diameters between the grooves in any one pulley shall be within the limits given in Table 3. This variation is obtained by comparing the diameter over balls or rods. Table 3 Groove-to-groove diameter variation 3.3.3 Radial circular run-out Radial circular run-out shall be within the limits given in
26、 Table 4. Radial run-out measured with a ball mounted under spring pressure to ensure contact with the groove as the pulley is rotated. Figure 2 Pulley diameters Dimensions in millimetres Profile PH PJ PK PL PM Effective diameter, d e min. 13 20 45 75 180 Dimensions in millimetres Effective diameter
27、, d e Number of grooves, n Maximum diameter variation d e 6 0,1 Add 0,003 for each additional groove 7410 0,15 Add0,005 for each additional groove d e 500 n 10 0,25 Add0,01 for each additional grooveBSISO9982:1998 4 BSI 04-1999 Table 4 Radial run-out 3.3.4 Axial circular run-out Axial circular run-o
28、ut (full indicator movement) shall be within0,002mm per millimetre of effective diameter. Run-out is measured with a ball mounted under spring pressure to ensure contact with the groove as the pulley is rotated. 3.3.5 Diameter over balls The tolerances on the diameter over balls (K) shall be within
29、the limits given in Table 5. Table 5 Tolerance on the diameter over balls 3.3.6 Groove finish The pulley grooves shall have a surface roughness R a 250 0,25+0,0004 per millimetre of effective diameter over250 a Full indicator movement. Dimensions in millimetres Diameter over balls, K Tolerance K 75
30、75 K 200 For each additional25mm, add 0,3 0,6 0,1BSISO9982:1998 BSI 04-1999 5 3.5 Designation of pulleys A V-ribbed pulley is characterized by the number of grooves, the profile and the effective diameter. It is designated by a series of numbers and letters as follows: a) the first letter “P” means
31、“Pulley”; b) the first set of numbers indicates the number of grooves; c) the second set of letters indicates the groove profile; d) the second set of numbers indicates the effective diameter, in millimetres. EXAMPLE 4 Belts 4.1 Belt dimensions The belt dimensions are shown on Figure 4, and given in
32、 Table 6. Table 6 Belt dimensions Figure 3 Determination of pitch diameter Dimensions in millimetres Profile PH PJ PK PL PM Rib pitch, P b 1,6 2,34 3,56 4,7 9,4 r b min. 0,3 0,4 0,5 0,4 0,75 r t max. 0,15 0,2 0,25 0,4 0,75 Belt height, h 3 4 6 10 17 NOTEBelt rib pitch and belt height are shown as re
33、ference dimensions only. Cumulative rib pitch tolerance is an important value, however, it is frequently affected by the tension at which the belt operates and the modulus of the tension member.BSISO9982:1998 6 BSI 04-1999 4.2 Measurement of effective belt length 4.2.1 Measuring fixture (see Figure
34、5) The effective belt length shall be determined by placing the belt on a measuring fixture composed of the following elements. 4.2.1.1 Two pulleys of equal diameter, one of which is fixed and the other movable. Their profile shall comply with Figure 1 and Table 1, and their recommended effective di
35、ameter shall be determined from the values given in Table 7. Figure 4 Cross-section of beltBSISO9982:1998 BSI 04-1999 7 Table 7 Measuring pulleys and measuring forces 4.2.1.2 Device for applying a total measuring face to the movable pulley. 4.2.1.3 Device for measuring the centre distance between th
36、e two pulleys. 4.2.2 Measuring force The measuring force to be applied for measuring the effective length of belts is given in Table 7. 4.2.3 Procedure To measure the effective length of a belt, rotate the belt at least two revolutions to seat it properly and to divide the total force equally betwee
37、n the two strands of the belt. Then measure the centre distance between the pulleys, E, and calculate the effective length, L e , of the belt using the following formula: L e = E max + E min + U e where 4.2.4 Manufacturing tolerances The permissible manufacturing tolerances for effective lengths of
38、V-ribbed belts are given in Table 8. The tolerances for Table 8 are approximately calculated using the equations given below. The values for L ein the equation are the maximum for the range and the results are rounded to reasonable values. Figure 5 Measuring fixture to determine effective length Dim
39、ensions in millimetres and measuring forces in newtons Profile PH PJ PK PL PM Pulley effective circumference (at the level of effective diameter), U e 100 300 100 300 300 500 800 Diameter over balls or rods, K 0,13 31,94 95,6 32,06 95,72 96,48 161,51 259,17 Measuring force per rib, F 30 50 100 200 4
40、50 U e is the effective circumference of the measuring pulleys; E max is the maximum centre distance between the pulleys; E min is the minimum centre distance between the pulleys.0,3L e 3 0,003L e + 20,3L e 3 0,003L e + () BSISO9982:1998 8 BSI 04-1999 Table 8 Manufacturing tolerances for effective l
41、engths of V-ribbed belts 4.3 Designation of belts A V-ribbed belt is characterized by the number of belt ribs, the profile and the effective length. It is designated by a series of numbers and letters as follows: a) the first set of numbers indicates the number of belt ribs; b) the letters indicate
42、the belt profile; c) the second set of numbers indicates the effective length, in millimetres. EXAMPLE Dimensions and tolerances in millimetres Effective length Permissible deviation for profiles L e PH PJ PK PL PM 200L e 500 +4 8 +4 8 +4 8 500L e 750 +5 10 +5 10 +5 10 750L e 1000 +6 12 +6 12 +6 12
43、+6 12 1000L e 1500 +8 16 +8 16 +8 16 +8 16 1500L e 2000 +10 20 +10 20 +10 20 +10 20 2000L e 3000 +12 24 +12 24 +12 24 +12 24 +12 24 3000L e 4000 +15 30 +15 30 4000L e 6000 +20 40 +20 40 6000L e 8000 +30 60 +30 60 8000L e 12500 +45 90 12500L e 17000 +60 120BSISO9982:1998 BSI 04-1999 9 Annex A (inform
44、ative) Bibliography 1 ISO8370-2:1993, Belt drives Dynamic test to determine pitch zone location Part2: V-ribbed belts. 2 ISO9981:1998, Belt drives Pulleys and V-ribbed belts for the automotive industry PKprofile:Dimensions.BS ISO 9982:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandards
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