1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2010 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside U
4、SA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visit http:/www.sae.org/technical/standards/J2387_201008SURFACEVEHICLERECOMMENDEDPRACTICEJ2387 AUG2010 Issued 1997-10 Revised 2010-08Supers
5、eding J2387 JAN2003 Dimensions and Tolerances for Coolant System Hoses RATIONALE This document is being revised to use one significant decimal digit in place of two, for consistency. Also to correct the mathematical error in 4.2. 1. SCOPE The purpose of this SAE Recommended Practice is to provide di
6、mensions for both standard and thin-wall hoses and to provide commercial and precision tolerances for SAE 20R3 and SAE 20R4 coolant system hoses. 2. REFERENCES 2.1 Applicable Publications The following publications form a part of this specification to the extent specified herein. Unless otherwise in
7、dicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org.SAE J20 Coolant System Hoses SAE J2605 Non-Conta
8、ct Hose Measurement Study 1 3. DIMENSIONS AND TOLERANCES FOR SAE 20R3 Target dimensions and tolerances are shown in Tables 1A through 4B. Contact or non-contact measurement method must be agreed upon by manufacturer and customer. Since expanded ends may cause wall gages to change, O.D.s and toleranc
9、es for the expanded ends must also be agreed upon by the manufacturer and customer. Dimensions and tolerances other than those listed in Tables 1A to 4B must be agreed upon by manufacturer and customer. SAE J2387 Revised AUG2010 Page 2 of 4TABLE 1A - STANDARD WALL DIMENSIONS AND COMMERCIAL TOLERANCE
10、S FOR SAE 20R3 Tolerances and Method for Contact Measurement IDmmIDTolerance mmTarget OD(1)mmODTolerancemmReference Wall mmMaximum Wall Thickness Variationmm5.0 to 25.4 0.8 Maximum ID Plus 10.0 mm 1.6 5.0 1.0 1. The target OD should be measured over a plug gauge equal to the specified maximum ID. TA
11、BLE 1B - STANDARD DIMENSIONS AND COMMERCIAL TOLERANCES FOR SAE 20R3 Tolerances for Non-Contact Measurement (see SAE J2605) IDmmIDTolerance mmTarget Wall ThicknessmmWall Thickness Tolerance mmMaximum Wall ThicknessVariationmm5.0 to 25.4 0.8 5.0 0.8 1.0 TABLE 2A - STANDARD WALL DIMENSIONS AND PRECISIO
12、N TOLERANCES FOR SAE 20R3 (GENERALLY APPLIED TO WRAPPED MANDREL-BUILT HOSES ONLY) IDmmIDTolerance mmTarget OD(1)mmODTolerancemmReferenceWall mmMaximum Wall ThicknessVariationmm5.0 to 25.4 0.8 Maximum IDPlus 7 mm 1.2 3.5 1.0 1. The target OD should be measured over a plug gauge equal to the specified
13、 maximum ID. TABLE 3B - THIN WALL DIMENSIONS AND COMMERCIAL TOLERANCES FOR SAE 20R3 Tolerances for Non-Contact Measurement (see SAE J2605) IDmmIDTolerance mmTarget Wall ThicknessmmWall Thickness Tolerance mmMaximum Wall Thickness Variationmm5.0 to 25.4 0.8 3.5 0.6 1.0 TABLE 4A - THIN WALL DIMENSIONS
14、 AND PRECISION TOLERANCES FOR SAE 20R3 (GENERALLY APPLIED TO WRAPPED MANDREL-BUILT HOSES ONLY) IDmmIDTolerance mmTarget OD(1) mmODTolerancemmReferenceWall mmMaximum Wall ThicknessVariationmm5.0 to 9.0 0.5 Maximum IDPlus 6 mm 0.5 3.0 1.0 9.0 and larger 0.5 Maximum IDPlus 7 mm 0.5 3.5 1.0 1. The targe
15、t OD should be measured over a plug gauge equal to the specified maximum ID. TABLE 4B - THIN WALL DIMENSIONS AND PRECISION TOLERANCES FOR SAE 20R3 (GENERALLY APPLIED TO WRAPPED MANDREL-BUILT HOSES ONLY) Tolerances for Non-Contact Measurement (see SAE J2605) IDmmIDTolerance mmTarget Wall Thickness mm
16、ODTolerance mmMaximum Wall Thickness Variationmm5.0 to 9.0 0.8 3.0 0.5 1.0 9.0 and larger 0.8 3.5 0.5 1.0 SAE J2387 Revised AUG2010 Page 4 of 44. DIMENSIONS AND TOLERANCES FOR SAE 20R4 Target dimensions and tolerances are shown in 4.1 through 4.4. Measurement method must be agreed upon by manufactur
17、er and customer. Since expanded ends may cause wall gages to change, O.D.s and tolerances for the expanded ends must also be agreed upon by the manufacturer and customer. Dimensions and tolerances other than those listed in the following paragraph must be agreed upon by manufacturer and customer. Si
18、nce the wall gage may change due to bends near the end of hoses, the wall gage reported will be the average of four readings taken 90 degrees apart. 4.1 Standard Wall Dimensions and Commercial Tolerances for SAE 20R4 The I.D. tolerance is 0.8 mm for hose sizes smaller than 70 mm and 1.6 mm for hose
19、sizes 70 mm and larger. The wall gage and tolerance is 5.0 mm 0.7 mm (4.3 to 5.7 mm) for hose sizes smaller than 50.8 mm and 5.4 mm 1.1 mm (4.3 to 6.5 mm) for hose sizes 50.8 mm and larger. 4.2 Standard Wall Dimensions and Precision Tolerances for SAE 20R4 The I.D. tolerance is 0.5 mm for hose sizes
20、 smaller than 70 mm and 1.0 mm for hose sizes 70 mm and larger. The wall gage and tolerance is 5.0 mm 0.7 mm (4.3 to 5.7 mm) for hose sizes smaller than 50.8 mm and 5.4 mm 0.8 mm (4.6 to 6.2 mm) for hose sizes 50.8 mm and larger. 4.3 Thin-Wall Dimensions and Commercial Tolerances for SAE 20R4 The I.
21、D. tolerance is 0.8 mm for hose sizes smaller than 38 mm. The wall gage and tolerance is 4.0 mm 0.6 mm (3.4 to 4.6 mm) for hose sizes smaller than 38 mm. For hose larger than 38 mm, the dimensions and tolerances should be agreed upon between the customer and hose manufacturer. 4.4 Thin-Wall Dimensio
22、ns and Precision Tolerances for SAE 20R4 The I.D. tolerance is 0.5 mm for hose sizes smaller than 38 mm. The wall gage and tolerance is 4.0 mm 0.5 mm (3.5 to 4.5 mm) for hose sizes smaller than 38 mm. For hose larger than 38 mm, the dimensions and tolerances should be agreed upon between the custome
23、r and hose manufacturer. 5. NOTES 5.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE NON-HYDRAULIC HOSE COMMITTEE
