1、CEN EN*:28737 92 m 3Y04589 0034594 8T4 m EUROPEAN STANDARD EN 28737 NORMEEUROPENNE EUROPISCHE NORM July 1992 UDC 621.886.115 Descriptors: Fasteners, locating pins, taper pins, specifications, dimensions, designation English version %per pins with external thread, unhardened (IS0 8737 : 1986) Goupill
2、es de position coniques longueur filete, non trempes . (IS0 8737 : 1986) (IS0 8737 : 1986) Kegelstifte mit Gewindezapfen, ungehrtet This European Standard was approved by CEN on 1992-07-17. CEN members are bound to comply with the CENXENELEC Internal Regulations which stipulate the conditions for gi
3、ving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official ver
4、sions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium,
5、 Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart
6、 36, B-1050 Brussels 0 1992 Copyright reserved to CEN members Ref. No. EN 28737 : 1992 E CEN EN828737 92 = 3404589 0034595 730 W Page 2 EN 28737 : 1992 Foreword In 1992, CEN lchnical Committee CEN/TC 185 Threaded and non threaded mechanical fasteners and accessories the secretariat of which is held
7、by DIN decided to submit the International Standard IS0 8737 : 1986 7hper pins with external thread, unhardened to the formal vote procedure. The result was positive. In the countries bound to implement this European Standard a national standard identical to this European standard shall be published
8、 at the latest by 1993-01-31 and confiicting national standards shall be withdrawn at the latest by 1993-01-31. According to the CENKENELEC Common Rules the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Irelan
9、d, Italy, Luxembourg, Netherlands, Norway, Spain, Portugal, Sweden, Switzerland and United Kingdom. - CEN EN+28?3? 92 m 3404589 003459b b? m Page 3 EN 28737 : 1992 Taper pins with external thread, unhardened 1 Scope and field of application This International Standard specifies the characteristics o
10、f unhardened taper pins with external thread, and metric dimensions and nominal diameters, d, from 5 to 50 mm inclusive. 2 References IS0 965, IS0 general purpose metric screw threads - Tolerances. IS0 2081, Metallic coatings - Electroplated coatings of zinc on iron or steel. IS0 3269, Fasteners - A
11、cceptance inspection. IS0 4520, Chromate conversion coatings on electroplated zinc and cadmium coatings. CEN ENr28737 92 = 3404589 0034597 503 Incomplete thread Page 4 EN 28737 : 1992 dl hld a max. 3 Dimensions 6 6 8 10 12 16 a) E6 a) 40 Bo 2.4 3 4 4,5 5,3 6 6 7.5 9 10.5 12 Surface roughness values
12、in micrometres max. 15.6 min. 14 b d2 M5 P” 0,8 20 24.5 27 30,5 39 39 45 52 65 78 18 22 24 27 35 35 40 46 58 70 M6 M8 M10 M12 M16 M16 M20 M24 M30 M36 1 1.25 1.5 1,75 2 2 2.5 3 3.5 4 2P” max. min. d3 max. t min. 13) nom. I min. I mar. Dimensions in millimetres 3,5 4 5.5 7 8.5 12 12 15 18 23 28 1,5 1.
13、75 2.25 2.75 3.25 4,3 4.3 5.3 6.3 7.5 9,4 1.25 1,5 2 2.5 3 4 4 5 6 7 9 3,25 3,7 52 63 8,1 11.5 11.5 14,5 17,5 22.5 27,5 II P = thread pitch. 2) Other tolerances as agreed between customer and supplier. 3) For nominal lengths above 400 mm. steps of 40 mm. CEN ENt28737 92 3404589 0034598 4YT H Screw t
14、hread Material Surface finish Page 5 EN 28737 : 1992 Metric screw thread with tolerance 6g to IS0 965. St = Free-cutting steel, Other materials as agreed between customer and supplier. Plain, .e. pins to be supplied in natural finish, treated with rust-preventative lubricant, unless otherwise specif
15、ied by agreement between customer and supplier. Preferred coatings are black oxide, phosphate coating or zinc plating with chromate conversion coating (see IS0 2081 and IS0 4520). Other coatings as agreed between customer and supplier. Ail tolerances shall apply prior to the application of a plating
16、 or coating. hardness 125,to 245 HV. 4 Specifications and reference International Standards I Workmanrhip Parts shall be uniform in quality and free of irregularities or detrimental defects. I No burrs shall aDDear on any Dart of the Din. I laper The taper shall be inspected by use of an adequate optical comparator. Acceptability I The acceptance procedure is covered in IS0 3269. I 5 Designation Example for the designation of an unhardened steel taper pin with external thread, nominal diameter dl = 6 mm and nominal length I=5mm: Taper pin IS0 8737 - 6 x 50 - St
