1、BRITISH STANDARD BS ISO 8419:2003 Belt drives Narrow V-belts Sections 9N/J, 15N/J and 25N/J (lengths in the effective system) ICS 21.220.10 BS ISO 8419:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 12 February 2003 BSI 12 February 2003
2、 ISBN 0 580 41244 X National foreword This British Standard reproduces verbatim ISO 8419:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MCE/10, Belts and pulley drives, which has the responsibility to: A list of organi
3、zations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index
4、”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. 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 does not of itself confe
5、r immunity from legal obligations. 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; monitor related international and European developments and promulgat
6、e them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii and iii, a blank page, pages 1 to 7 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since p
7、ublication Amd. No. Date Comments Reference number ISO 8419:2003(E)INTERNATIONAL STANDARD ISO 8419 Third edition 2003-02-01 Belt drives Narrow V-belts Sections 9N/J, 15N/J and 25N/J (lengths in the effective system) Transmissions par courroies Courroies trapzodales troites Sections 9N/J, 15N/J et 25
8、N/J (longueurs dans le systme effectif) BSISO8419:2003IS:9148 O3002(E) DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In ccacnadrow eitA hebods licnesilop gnic,y tihs file mirp eb yatnde iv roweb detu slahl ton ide ebtlnu deess teh typfecaes wihce era hml era deddebicsnede ti dna onstl
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11、lsaee ifnrom ttneC ehlar Secterirata ta teh serddaig sleb nevwo. ISO 3002 Athgir lls serevr.de selnUs towrehise specfidei, trap on fo thsi ilbupctanoi may cudorper ebtu ro dezilina ni dey fomr yb ro nam y,snae lecetrinoc m roceinahcla, icnliduntohp gcoiypom dna gnicrfoilm, wittuoh mrepissii non writ
12、if gnrmo ietI rehSta O tserdda ehs ebolw or ISOs memreb i ydobn the cnuotfo yr ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o groii BSISO8419:2003 iiiForeword ISO (the International Organizati
13、on for 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 ha
14、s the right 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. Inte
15、rnational 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. Publica
16、tion as 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 rig
17、hts. ISO 8419 was prepared by Technical Committee ISO/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 1, Friction belt drives. This third edition cancels and replaces the second edition (ISO 8419:1994), of which it constitutes a technical revision. BSISO8419:2003INTENRATIONAL TSANDADR
18、 IS:9148 O3002(E)1Belt drives Narrow V-belts Sections 9N/J, 15N/J and 25N/J (lengths in the effective system) 1 Scope This International Standard specifies, for narrow V-belts of cross-sections 9N/J (for pulley grooves of effective width 8,9 mm), 15N/J (for pulley grooves of effective width 15,2 mm)
19、 and 25N/J (for pulley grooves of effective width 25,4 mm), the standard effective lengths, the tolerances on effective lengths, the centre distance variations, the conditions for measuring the effective length and the centre distance variation, and the designation and marking. NOTE 1 The cross-sect
20、ion of a narrow V-belt is defined by a number (9, 15 or 25) followed by the letter N or J to denote single or joined belts. NOTE 2 To define belts of raw-edge cogged construction, the letter “X” is added, i.e. NX or JX. 2 Normative references The following referenced documents are indispensable for
21、the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1081, Belt drives V-belts and V-ribbed belts, and corresponding grooved pulleys Vocabulary ISO 5290:20
22、01, Belt drives Grooved pulleys for joined narrow V-belts Groove sections 9N/J, 15N/J and 25N/J (effective system) ISO 9608, V-belts Uniformity of belts Test method for determination of centre distance variation 3 Terms, definitions and symbols For the purposes of this document, the terms, definitio
23、ns and symbols relating to drives using V-belts (i.e. belt and grooved pulleys) given in ISO 1081 and ISO 9608 apply 4 Effective length, L e4.1 The standard effective lengths are the effective lengths under tension measured under the conditions specified in 7.1. BSISO8419:20032 4.2 The nominal value
24、s of the standard effective lengths of V-belts, expressed in millimetres, have been selected from the R 40 series of preferred numbers, in accordance with ISO 3. 4.3 Standard effective lengths are given in Table 1. 5 Tolerances on effective length 5.1 Manufacturing tolerances The permissible manufac
25、turing tolerances for effective length of narrow V-belts are given in Table 2. 5.2 Belt-matching tolerances for narrow V-belts in same set Values for the tolerances on the lengths of narrow V-belts of the same set in multiple V-belt drives are given in Table 3. BSISO8419:2003 3Table 1 Standard effec
26、tive lengths Dimensions in millimetres Cross-sections 9N, 9NX, 9J, 9JX 15N, 15NX, 15J, 15JX 25N, 25NX, 25J, 25JX L e630 1 270 2 540 670 1 345 2 690 710 1 420 2 840 760 1 525 3 000 800 1 600 3 180 850 1 700 3 350 900 1 800 3 550 950 1 900 3 810 1 015 2 030 4 060 1 080 2 160 4 320 1 145 2 290 4 570 1
27、205 2 410 4 830 1 270 2 540 5 080 1 345 2 690 5 380 1 420 2 840 5 690 1 525 3 000 6 000 1 600 3 180 6 350 1 700 3 350 6 730 1 800 3 550 7 100 1 900 3 810 7 620 2 030 4 060 8 000 2 160 4 320 8 500 2 290 4 570 9 000 2 410 4 830 9 500 2 540 5 080 10 160 2 690 5 380 10 800 2 840 5 690 11 430 3 000 6 000
28、 12 060 3 180 6 350 12 700 3 350 6 730 3 550 7 100 7 620 8 000 8 500 9 000 BSISO8419:20034 Table 2 Manufacturing tolerances for narrow V-belts Dimensions in millimetres Nominal effective length L ePermissible deviation for sections 9N, 9NX, 15N, 15NX, 25N, 25NX and 9J, 9JX, 15J, 15JX, 25J, 25JX L eu
29、 800 8 800 L eu 1 000 10 1 000 L eu 1 270 13 1 270 L eu 1 600 16 1 600 L eu 2 030 20 2 030 L eu 2 540 25 2 540 L eu 3 180 32 3 180 L eu 4 060 40 4 060 L eu 5 080 50 5 080 L eu 6 350 63 6 350 L eu 8 000 80 8 000 L eu 10 160 100 10 160 L e 125 Table 3 Belt-matching tolerances Dimensions in millimetres
30、 Nominal effective length L eMaximum permissible deviation between the lengths of belts of the same set for sections 9N, 9NX, 15N, 15NX, 25N, 25NX and 9J, 9JX, 15J, 15JX, 25J, 25JX L eu 800 3 800 L eu 1 270 4 1 270 L eu 2 030 6 2 030 L eu 3 550 8 3 550 L eu 6 000 10 6 000 L eu 10 160 14 10 160 L e18
31、 BSISO8419:2003 56 Centre distance variations Permissible centre distance variations of any belt are given in Table 4. Table 4 Centre distance variation limits Dimensions in millimetres Cross-sections 9N, 9J, 9NX, 9JX 15N, 15J, 15NX, 15JX 25N, 25NX, 25J, 25JX Nominal effective length L eE L eu 1 015
32、 1,2 1,8 1 015 L eu 2 030 1,6 2,2 2 030 L eu 5 080 2 3,4 5 080 L e2,5 3,4 7 Measuring and checking 7.1 Checking the belt length For the measurement of the effective length, set the belt up on two identical pulleys with an effective circumference in accordance with that given in Table 5 and having fu
33、nctional dimensions, in accordance with ISO 5290. The pulleys shall be mounted on parallel horizontal axes on a testing bench. Apply the measuring force indicated in Table 5 to the sliding pulley. Rotate the pulleys in order that the belt effects one to three rotations and thus sits properly in the
34、pulley grooves. Measure the distance between the axes of the pulleys. The effective length L eof any belt is given by the following formula: em a xm i ne L EEC =+ where E is the distance between the axes of the measuring pulleys, in millimetres; C eis the effective circumference of the measuring pul
35、ley, in millimetres. Table 5 Measurement characteristics Belt section Effective circumference of the measuring pulleys mm Measuring force (per belt) N 9N, 9J, 9NX, 9JX 300 445 15N, 15J, 15NX, 15JX 600 1 000 25N, 25J, 25NX, 25JX 1 000 2 225 7.2 Checking the centre distance variation Centre distance v
36、ariations shall be checked in accordance with the test method described in ISO 9608. BSISO8419:20036 8 Designation The physical dimensions of narrow V-belts shall be designated by: the section (see Clause 1); the appropriate effective length (see Table 1). EXAMPLE A belt of section 9N (single belt)
37、or 9J (joined belt) and effective length 1 600 mm is designated as follows: 9N 1600 or 9J 1 600 9 Marking All narrow V-belts manufactured in accordance with this International Standard shall be marked legibly and durably on the outer non-working face of the belt, with the appropriate designation. BS
38、ISO8419:2003 7Bibliography 1 ISO 3, Preferred numbers Series of preferred numbers BSISO8419:2003BS ISO 8419:2003 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on sta
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