1、BSI Standards PublicationBS ISO 500-3:2014Agricultural tractors Rear-mounted power take-off types1, 2, 3 and 4Part 3: Main PTO dimensions and splinedimensions, location of PTOBS ISO 500-3:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 500-3:2014. Itsupers
2、edes BS ISO 500-3:2004 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee AGE/6, Agricultural tractors and forestry machinery.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport
3、 to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 74593 5ICS 65.060.10Compliance with a British Standard cannot confer immunity fromlegal obligations.Th
4、is British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2014.Amendments issued since publicationDate Text affectedBS ISO 500-3:2014 ISO 2014Agricultural tractors Rear-mounted power take-off types 1, 2, 3 and 4 Part 3: Main PTO dimensions and sp
5、line dimensions, location of PTOTracteurs agricoles Prises de force montes larrire des types 1, 2, 3 et 4 Partie 3: Dimensions principales de la prise de force et dimensions des cannelures, emplacement de la prise de forceINTERNATIONAL STANDARDISO500-3Second edition2014-04-01Reference numberISO 500-
6、3:2014(E)BS ISO 500-3:2014ISO 500-3:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photoco
7、pying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-m
8、ail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 500-3:2014ISO 500-3:2014(E) ISO 2014 All rights reserved iiiContents PageForeword iv1 Scope . 12 Normative references 13 PTO location . 14 Manufacturing requirements Main PTO and spline dimensions 2Bibliography .16BS ISO 500-3:2014ISO
9、 500-3:2014(E)ForewordISO (the International Organization 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
10、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 take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) o
11、n all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted
12、. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives). 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 a
13、ny or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents). Any trade name used in this document is information given for the convenience of
14、users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Suppleme
15、ntary informationThe committee responsible for this document is ISO/TC 23, Tractors and machinery for agriculture and forestry, Subcommittee SC 4, Tractors.This second edition cancels and replaces the first edition (ISO 500-3:2004), of which it constitutes a minor revision.ISO 500 consists of the fo
16、llowing parts, under the general title Agricultural tractors Rear-mounted power take-off types 1, 2, 3 and 4: Part 1: General specifications, safety requirements, dimensions for master shield and clearance zone Part 2: Narrow-track tractors, dimensions for master shield and clearance zone Part 3: Ma
17、in PTO dimensions and spline dimensions, location of PTOiv ISO 2014 All rights reservedBS ISO 500-3:2014INTERNATIONAL STANDARD ISO 500-3:2014(E)Agricultural tractors Rear-mounted power take-off types 1, 2, 3 and 4 Part 3: Main PTO dimensions and spline dimensions, location of PTO1 ScopeThis part of
18、ISO 500 specifies the manufacturing requirements for, and the location of, rear-mounted power take-offs (PTOs) of types 1, 2, 3, and 4 on agricultural tractors.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for it
19、s application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 6508 (all parts), Metallic materials Rockwell hardness test 3 PTO location The location of the PTO axis shall lie within t
20、he shaded rectangle shown in Figure 1 and in accordance with Table 1, parallel to the longitudinal axis of the tractor and should be parallel to the ground within 3.The values of the dimension h are for normal agricultural applications (see Figure 1 and Table 1). On tractors especially designed for
21、high ground clearance, such as working in standing vegetable crops or sugar cane, hmax, can exceed the given values. On agricultural tractors designed for low ground clearance, such as lawn mowing or ground care which require a low centre of gravity, for narrow-track tractors, and for track-laying t
22、ractors, hmin, can be less than the given values.For tractors that can accommodate multiple PTO types, hmaxshall be the value for the largest PTO type specified for the tractor. ISO 2014 All rights reserved 1BS ISO 500-3:2014ISO 500-3:2014(E)Dimensions in millimetresKey1 centre line of tractor2 trac
23、k widthFigure 1 PTO locationTable 1 PTO locationDimensions in millimetresPTO type hminhmax1 480 8002 530 9003 600 1 0004 600 1 0004 Manufacturing requirements Main PTO and spline dimensionsThe dimensions of the rear PTO on agricultural tractors and the mating part of the PTO drive shaft shall comply
24、 with: Figure 2 and Table 2, for PTO dimensions; Figure 3 and Table 3, for external, straight-sided spline dimensions Type 1; Figure 4 and Table 4, for internal straight-sided spline dimensions Type 1; Figure 5 and Table 5, for external, involute spline dimensions Type 2; Figure 6 and Table 6, for i
25、nternal, involute spline dimensions Type 2; Figure 7 and Table 7, for external, involute spline dimensions Type 3;2 ISO 2014 All rights reservedBS ISO 500-3:2014ISO 500-3:2014(E) Figure 8 and Table 8, for internal, involute spline dimensions Type 3; Figure 9 and Table 9, for external, involute splin
26、e dimensions Type 4; Figure 10 and Table 10, for internal, involute spline dimensions Type 4.The hardened portion of the splines shall have a minimum surface hardness of 48 HRC when tested in accordance with ISO 6508 (all parts).NOTE For general spline information, including inspection, see ISO 4156
27、 (all parts).a) Type 1b) Types 2, 3, and 4Figure 2 PTO dimensions ISO 2014 All rights reserved 3BS ISO 500-3:2014ISO 500-3:2014(E)Table 2 PTO dimensionsDimensions in millimetresDimensions Type 1 Type 2 Type 3 Type 4A Groove to end of shaft 38 0,8 25,5 0,8 38 0,8 50 0,8B Effective spline length and h
28、ardened portion 76 64 89 100C Chamfer6 01+5 01+6 01+8 01+D Chamfer angle 30 3 30 3 30 3 30 3E ID of groove 29,40 0,1 29,40 0,1 37,25 0,1 48 0,1R Radius of groove 6,8 0,25 6,8 0,25 8,4 0,25 10,4 0,25Dimensions in millimetresKeyaOptional.Figure 3 External, straight-sided spline dimensions Type 14 ISO
29、2014 All rights reservedBS ISO 500-3:2014ISO 500-3:2014(E)Table 3 External, straight-sided spline dimensions Type 1Dimensions in millimetresDimension Symbol ValueNumber of teeth Z 6Major diameter DEE34,87 0120,Form diameter DFE 30,00Minor diameter DIE29,00 0100,Tooth thickness max. eff. SVmax8,64Too
30、th thickness max. act. REF Smax(8,60)Tooth thickness min. act. Smin8,51Allowed form variations Composite GO gage has priorityTotal profile variation FF0,020Total lead variation FB0,015Total index variation FP0,040 ISO 2014 All rights reserved 5BS ISO 500-3:2014ISO 500-3:2014(E)Dimensions in millimet
31、resFigure 4 Internal, straight-sided spline dimensions Type 16 ISO 2014 All rights reservedBS ISO 500-3:2014ISO 500-3:2014(E)Table 4 Internal, straight-sided spline dimensions Type 1Dimensions in millimetresDimension Symbol ValueNumber of teeth Z 6Major diameter DEI34,95 0050,Form diameter DFI 34,50
32、Minor diameter DII29,80 0150,Space width max. act. Emax8,76Space width min. act. REF Emin(8,71)Space width min. eff. EVmin8,69Allowed form variations Composite GO gage has priorityTotal profile variation FF0,020Total lead variation FB0,015Total index variation FP0,040Dimensions in millimetresFigure
33、5 External, involute spline dimensions Type 2 ISO 2014 All rights reserved 7BS ISO 500-3:2014ISO 500-3:2014(E)Table 5 External, involute spline dimensions Type 2Dimensions in millimetresDimension Symbol Value For alternative imperial pin sizeNumber of teeth Z 21 Module M 1,587 5 Pressure angle 30 Pi
34、tch diameter D 33,338 Base diameter DB28,871 1 Major diameter DEE34,874 0 0250,Form diameter DFE 31,65 Minor diameter DIE31,100 0 2500,Tooth thickness max. eff. SVmax2,406 Tooth thickness max. act. REF Smax(2,369) Tooth thickness min. act. Smin2,306 Pin diameter DRE3,50 3,048Dim. over pins max. REF
35、MREmax(39,00) (37,759)Dim. over pins min. MREmin38,906 37,662Allowed form variations Composite GO gage has priorityTotal profile variation FF0,020 Total lead variation FB0,013 Total index variation FP0,040 Concentricity DEEto D 0,03 Dimensions in millimetresFigure 6 Internal, involute spline dimensi
36、ons Type 28 ISO 2014 All rights reservedBS ISO 500-3:2014ISO 500-3:2014(E)Table 6 Internal, involute spline dimensions Type 2Dimensions in millimetresDimension Symbol Value For alternative imperial pin sizeNumber of teeth Z 21 Module M 1,587 5 Pressure angle 30 Pitch diameter D 33,338 Base diameter
37、DB28,871 1 Major diameter DEI34,925 00 036+ , Form diameter DFI 34,62 Minor diameter DII31,750 00150+ , Space width max. act. Emax2,565 Space width min. act. REF Emin(2,520) Space width min. eff. EVmin2,494 Pin diameter/flattened DRI2,75/2,60 2,743/2,60Dim. between pins max. MRImax29,380 29,403Dim.
38、betw. pins min. REF MRImin(29,290) (29,315)Allowed form variations Composite GO gage has priorityTotal profile variation FF0,020 Total lead variation FB0,013 Total index variation FP0,040 Concentricity DEIto D 0,02 ISO 2014 All rights reserved 9BS ISO 500-3:2014ISO 500-3:2014(E)Dimensions in millime
39、tresFigure 7 External, involute spline dimensions Type 310 ISO 2014 All rights reservedBS ISO 500-3:2014ISO 500-3:2014(E)Table 7 External, involute spline dimensions Type 3Dimensions in millimetresDimension Symbol Value For alternative imperial pin sizeNumber of teeth Z 20 Module M 2,116 7 Pressure
40、angle 30 Pitch diameter D 42,333 Base diameter DB36,661 7 Major diameter DEE44,425 0 0250,Form diameter DFE 40,10 Minor diameter DIE39,210 0 2500,Tooth thickness max. eff. SVmax3,237 Tooth thickness max. act. REF Smax(3,200) Tooth thickness min. act. Smin3,137 Pin diameter DRE4,000 4,064Dim. over pi
41、ns max. REF MREmax(48,239) (48,418)Dim. over pins min. MREmin48,142 48,321Allowed form variations Composite GO gage has priorityTotal profile variation FF0,020 Total lead variation FB0,013 Total index variation FP0,040 Concentricity DEEto D 0,03 Dimensions in millimetresFigure 8 Internal involute sp
42、line dimensions Type 3 ISO 2014 All rights reserved 11BS ISO 500-3:2014ISO 500-3:2014(E)Table 8 Internal involute spline dimensions Type 3Dimensions in millimetresDimension Symbol Value For alternative imperial pin sizeNumber of teeth Z 20 Module M 2,116 7 Pressure angle 30 Pitch diameter D 42,333 B
43、ase diameter DB36,661 7 Major diameter DEI44,450 00 038+ , Form diameter DFI 44,044 Minor diameter DII40,200 00150+ , Space width max. act. Emax3,396 Space width min. act. REF Emin(3,351) Space width min. eff. EVmin3,325 Pin diameter DRI3,75 3,658Dim. between pins max. MRImax36,850 37,153Dim. betw.
44、pins min. REF MRImin(36,758) (37,064)Allowed form variations Composite GO gage has priorityTotal profile variation FF0,020 Total lead variation FB0,013 Total index variation FP0,040 Concentricity DEIto D 0,02 12 ISO 2014 All rights reservedBS ISO 500-3:2014ISO 500-3:2014(E)Dimensions in millimetresF
45、igure 9 External, involute spline dimensions Type 4 ISO 2014 All rights reserved 13BS ISO 500-3:2014ISO 500-3:2014(E)Table 9 External, involute spline dimensions Type 4Dimensions in millimetresDimension Symbol Value For alternative imperial pin sizeNumber of teeth Z 22 Module M 2,50 Pressure angle 3
46、0 Pitch diameter D 55,000 Base diameter DB47,631 4 Major diameter DEE57,500 0 0250,Form diameter DFE 52,26 Minor diameter DIE51,18 0 2500,Tooth thickness max. eff. SVmax3,842 Tooth thickness max. act. REF Smax(3,805) Tooth thickness min. act. Smin3,742 Pin diameter DRE5,300 5,309Dim. over pins max.
47、REF MREmax(63,618) (63,641)Dim. over pins min. MREmin63,523 63,548Allowed form variations Composite GO gage has priorityTotal profile variation FF0,020 Total lead variation FB0,013 Total index variation FP0,040 Concentricity DEEto D 0,03 Dimensions in millimetresFigure 10 Internal, involute spline d
48、imensions Type 414 ISO 2014 All rights reservedBS ISO 500-3:2014ISO 500-3:2014(E)Table 10 Internal, involute spline dimensions Type 4Dimensions in millimetresDimension Symbol Value For alternative imperial pin sizeNumber of teeth Z 22 Module M 2,500 Pressure angle 30 Pitch diameter D 55,000 Base diameter DB47,631 4 Major diameter DEI57,525 00 038+ , Form diameter DFI 57,000 Minor diameter DII52,760 00150+ , Space width max. act. Emax4,001 Space width min. act. REF Emin(3,955) Space width min. eff. EVmin3,927 Pin diameter DRI4,50 4
