1、SURFACE VEHICLESTANDARDJ917 SEP2014Issued 1965-08Revised 2014-09Superseding J917 DEC2004Marine Push-Pull Control CablesRATIONALERevise the bend radius of the test procedure in 4.1 to be a defined 8” rather than manufacturers minimum. This brings SAE J917 in harmony with other industry standards. Rem
2、oved Engine Throttle lever and Inner member cable rod end attachment point from the definitions as they are not used in the document.1. SCOPEThis SAE Standard covers dimensions, performance parameters and nomenclature of a push-pull control cable used in inboard marine throttle and shift application
3、s. 1.1 PurposeThe flexible push-pull cable is a common motion transfer device for the remote operation of the throttle and/or shift levers on marine propulsion units. Satisfactory function of remote controls depend upon proper selection of control cable and providing adequate connection to the propu
4、lsion unit. This standard, therefore, establishes nomenclature, dimensions, performance classification and installation recommendations for marine push- pull control cables.1.2 GeneralThe conventional marine push-pull cable is a mechanism in which an inner member is supported and guided by a conduit
5、. Efficiency decreases with each additional bend in the cable path. Both ends of both elements must be securely connected if the cable is to operate properly.2. REFERENCES2.1 Applicable DocumentThe following publications form a part of this specification to the extent specified herein. Unless otherw
6、ise indicated, the latest issue of SAE publications shall apply.2.1.1 ASTM PublicationAvailable from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.orgASTM B 117 Standard Practice for Operating Salt Spray (Fog) Apparatus_SAE Te
7、chnical 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 therefrom, is
8、 the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2014 SAE InternationalAll rights reserved. No part of this publication
9、may 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 US
10、A)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/J917_201409SAE INTERNATIONAL J917 Revised SEP2014 Page 2 of 83. DEFINITIONSThe following definitions
11、 apply to components of marine push-pull control cable installations.3.1 CONDUIT ANCHOR POINTSPermanently attached sections on the control cable conduit that provide connection points.3.2 BACKLASHThe loss of output travel experienced by inner member moving from the outside to the inside radius of th
12、e conduit when the control cable is installed in a bend and the inner member experiences loads up to 67 N (15 lb) push and pull forces.3.3 CONTROL CABLEThe device which transmits motion from the remote control to the throttle or shift mechanism.3.4 CONDUITThe outer element of a control cable. Includ
13、ing inner member conduit and outer jacket of the control cable.3.5 INNER MEMBERThe inner element (wire) of a control cable.3.6 CYCLEThe movement of the inner member from a relative starting point through one complete extension stroke and one complete retraction stroke, returning to the relative star
14、ting point.3.7 EFFICIENCYThe output force divided by the input force expressed in percentage.3.8 SHIFT LEVER The lever on the shift mechanism that is moved by the control cable.3.9 LOST MOTIONThe total loss of output under load due to backlash plus the non-permanent deformation of the cable. 3.10 RE
15、COMMENDED OPERATING LOAD (ROL)The force that the control cable can withstand without failure 3.11 RODThe rigid extension of the inner member.3.12 TRAVELTotal linear movement between inner member and conduit. 3.13 ULTIMATE LOADThe highest force the control cable can sustain for one cycle before perma
16、nent deformation.SAE INTERNATIONAL J917 Revised SEP2014 Page 3 of 84. CLASSIFICATIONSCriterion to consider in the selection of a control cable are Recommended Operation Load, travel, mounting (style), efficiency, backlash and operating temperature. These parameters depend on the application and inst
17、allation of the control cable, and the selection is determined by the desired ergonomic force at each remote control station. Dimensions of the conduit anchor points are provided in figures 2, 3 and 4. 4.1 Recommended Operating Load (ROL) and Cycle Test.To determine the ROL of the control cable the
18、manufacturer will grade his control cables, based on tests under standard laboratory conditions 22 6 qC(7210qF). To grade a control cable the test sample shall achieve 100 000 cycles atROL, in tension and compression while the input is stroked a minimum of 64 mm (2.5 inches), with no more than 10% d
19、ecrease in efficiency and 10% increase in backlash. Test shall be run when the cable is installed with 270 degrees of bend at a bend radius of 203 mm (8 inches) (See figure 1)GRADE RECOMMENDED OPERATION LOAD FIGURE3 Up to 222 N (50 lb) 24 Up to 445 N (100 lb) 36 Up to 890 N (200 lb) 44.2 Travel2 50.
20、8 mm (2 in)3 76.2 mm (3 in)4 101.6 mm (4 in)4.3 StyleB BulkheadBC Bulkhead-ClampCClamp4.4 EfficiencyEfficiency of the control cable shall be a minimum of 65% when placed in a total of 270 degrees of bend at a bend radius of 203 mm (8 inches) and 50% of recommended operation load. The input force sha
21、ll be measured while the cable is stroked a minimum of 64mm (2.5 inches)4.5 BacklashCable backlash shall be equal to, or less than the values in Table 1 when the control cable is measured in 270 degrees of bend at a bend radius of 203 mm (8 inches) with a change of input load from compression to ten
22、sion of 67 Newtons (15 pounds). See figure 1 for description of measurement fixture. This measurement shall be made with the output held in a fixture to prevent relative movement.SAE INTERNATIONAL J917 Revised SEP2014 Page 4 of 8TABLE 1Cable Length BacklashLess than 6.1 Meters (20 Feet) 4.75 mm (0.1
23、87 inches)6.1 to 11 Meters (20 to 36 Feet) 5.5 mm (0.217 inches)Greater than 11 Meters ( 36 Feet) 6.35 mm (0.250 inches)FIGURE 1 - CABLE BACKLASH MEASUREMENT4.6 Lost MotionShall be a maximum of 5.08 + (0.67 times the length of cable in meters) mm 0.200 + (0.008 times the length of cable in feet) inc
24、hes when the control cable is measured in 270 degrees of bend at a bend radius of 203 mm (8 inches) with a change of input load from 50% of the ROL in tension to 50% of the ROL in compression. This measurement shall be made with the output held in a fixture to prevent relative movement.4.7 Temperatu
25、reThe control cable shall be able to withstand 82 qC (180 qF) sustained for 24 h with a maximum reduction in efficiency of 5% (but not lower than 65% efficiency) and/or a maximum increase in backlash of 5%. In addition, the control cable shall be able to withstand 18 qC (0 qF) sustained for 3 h with
26、out loss of flexibility. Flexibility shall be determined after the cold soak and at 18 qC (0 qF), the cable shall be bent 360 degrees around a mandrel set at the manufacturers recommended minimum bend radii without signs of cracking, splitting, or shattering.SAE INTERNATIONAL J917 Revised SEP2014 Pa
27、ge 5 of 84.8 Ultimate Load RequirementsThe ultimate load shall be at least twice the ROL for the grade of cable.5. ENVIRONMENTALThe test samples shall sustain a Salt Fog Test per ASTM B 117 for 240 h with a maximum decrease in efficiency of 10% and with a maximum of 5% Red Rust exhibited on the meta
28、llic surfaces 6. INSTALLATION CONSIDERATIONS6.1 For maximum efficiency control cables should be installed with as few bends as possible. Bends are unavoidable, but when routing the control cables, chose a location that allows for a bend radius of at least 203 mm (8 inches), and never less than the c
29、able manufacturers recommendation.6.2 The route of the cable to the throttle or shift mechanism should be direct as possible and unencumbered by accessory equipment.6.3 The push-pull cable shall be selected to accommodate the throttle and shift lever length and arc of travel.6.4 A rigid bracket for
30、anchoring the shift and throttle cable should be provided at the correct anchor point for the control cable operation. 6.5 The control cable should not be installed in areas of heat in excess of 82.2 C (180 F), such as on or close to an engine exhaust manifold. An extension rod or other means should
31、 be used to avoid the heat area. 6.6 Control cables should be routed to prevent contact with sharp edges.6.7 All threaded cable connections shall have a locking means.6.8 During installation of the cable consideration should be made to avoid locations where the cable may become pinched, crushed, or
32、abraded by other moving parts7. NOTES7.1 Marginal IndiciaA 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
33、 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 MARINE TECHNICAL STEERING COMMITTEESAE INTERNATIONAL J917 Revised SEP2014 Page 6 of 8FIGURE 2 - GRADE 3SAE INTERNATIONAL J917 Revised SEP2014 Page 7 of 8FIGURE 3 - GRADE 4SAE INTERNATIONAL J917 Revised SEP2014 Page 8 of 8FIGURE 4 - GRADE 6
