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1、INTERNATIONAL STANDARD IS0 8746 Second edition 1997-11-15 Grooved pins with round head Claus cannel a=400net; p=iso; o=isocs; s=central Printed in Switzerland ii Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/997254
2、5001 Not for Resale, 04/27/2007 02:55:21 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 8746:1997(E) Grooved pins with round head 1 Scope This International Standard specifies the characteristics of round head grooved pins which have three
3、equally spaced grooves impressed longitudinally on their exterior surface, with nominal diameter, d, from I,4 mm to 20 mm inclusive. The displaced material to each side of the grooves forming an expanded diameter, d2, which is larger than the nominal diameter d, will cause a non-positive locking fit
4、 when these grooved pins are forced into a drilled hole equal to the nominal diameter d, (see clause 4). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the edit
5、ions 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 most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently
6、 valid International Standards. IS0 3269: 1988, Fasteners -Acceptance inspection. IS0 4042:-l), Fasteners - Nectroplated coatings. IS0 97 17: 1990, Phosphate conversion coatings for metals - Method of specifying requirements. 1) To be published. (Revision of IS0 4042:1989) 1 Copyright International
7、Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 02:55:21 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8746: 1997(E) 3 Dimensions See figure 1 and table 1. NOTE - Types A
8、 and B are left to the discretion of the supplier, or specifically ordered by the customer. I) a= 15”to30 2) The grooving angle 70” applies only to grooved pins made from steel as shown in clause 5. The grooving angle may be modified depending on resilience of material. Type A: Pin with chamfered en
9、d NOTE - For other dimensions, see type A. Type B: Pin with pilot end Figure 1 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 02:55:21 MDTNo reproduction or networking permitt
10、ed without license from IHS -,-,- IS0 8746:1997(E) Table 1, - Dimensions Dimensions in millimetres k max. 0,9 + min. 0,7 0,9 I,1 1.4 1,65 2,25 2,85 3,45 4.6 6,5 7.5 10.0 13.1 1,6 1.9 2,4 2,6 3,s 4.6 5 7 7.5 8 9.5 13 16, 0,48 0,6 0.75 0,9 1,2 1.5 1,s 2.4 3,0 3.6 4.6 Expanded diameter, dzz”3 *0,05 I I
11、I min. max. 2,8 3,2 3,7 4.3 1,5 $7 5,3 5,7 6,3 7.7 8.3 9.7 IO,3 11,6 12,4 15,6 16,4 19,5 20,5 24,5 25.5 29,5 30.5 34,5 35,5 39,5 40,5 lam. 3 4 5 6 8 10 12 16 20 *O,l 2,15 2.7 3.2 4.25 5.25 6.3 8.3 10.35 12.35 20.5 16.4 I) The range of commercial lengths is between the stepped lines. 2) The expanded
12、diameter d, applies only to pins made from cold-heading steel. For other materials, for example stainless steel, a reduction amount shall be subtracted from the given values and should be agreed between customer and supplier. 3) For testing 4. a GO/NO GO ring gauge should be used. 4 Application The
13、diameter of the hofe into which the grooved pin is to be inserted shall be equal to the nominal diameter, d, of the mating pin and to tolerance class HI 1. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001
14、 Not for Resale, 04/27/2007 02:55:21 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO. 8746: 1997(E) 5 Requirements and reference International Standards See table 2. Table 2 - Requirements and reference International Standards Material Cold-heading steel (St), hardness
15、125 HV30 to 245 HV30 Other materials as agreed between customer and supplier. Grooves Surface finish Workmanship Form of groove at the discretion of the supplier. Plain, i.e. pins to be supplied in natural finish, treated with a protective lubricant, unless otherwise specified by agreement between c
16、ustomer and supplier. Preferred coatings are black oxide, phosphate coating or zinc plating with chromate conversion coating (see IS0 9717 and IS0 4042). Other coatings as agreed between customer and supplier. All tolerances shall apply prior to the application of a plating or coating. I Pins shall
17、be free of irregularities or detrimental defects. Accepta bilii The acceptance procedure is covered in IS0 3269. 6 Designation EXAMPLE A round head grooved steel pin with nominal diameter d, = 6 mm and nominal length 1= 30 mm is designated as follows: Grooved pin IS0 8746 - 6 x 30 - St If in special
18、 cases, one of the types, for example type A, specified in clause 3 is required this shall be given in the designation as follows: Grooved pin IS0 8746 - 6 x 30 - A - St 4 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standard
19、s 1/9972545001 Not for Resale, 04/27/2007 02:55:21 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 8746: 1997(E) ICS 21.060.50 Descriptors: fasteners, steel products, pins (mechanics), grooved pins, specifications, characteristics, dimensions, designation. Price based on 4 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/27/2007 02:55:21 MDTNo reproduction or networking permitted without license from IHS -,-,-