1、CEN EN*28749 92 = 3404589 0033049 359 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 28749 : 1992 July 1992 CDC 621.886.1 : 620.176 Descriptors: Fasteners, grooved pins, spring pins, shear tests, test equipment English version Pins and grooved pins - Shear test (IS0 8749 : 1986) Goupilles et g
2、oupilles canneles - Essai de cisaillement (IS0 8749 : 1986) (IS0 8749 : 1986) Stifte und Kerbstifte - Scherprfung This European Standard was approved by CEN on 1992-07-17. CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this Europea
3、n 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 versions (English, F
4、rench, 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, Denmark, Finland
5、 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 36, B-1050 Bruss
6、els O 1992 Copyright reserved to CEN members Ref. No. EN 28749 : 1992 E CEN ENx28749 92 3404589 0033050 070 Page 2 EN 28749 : 1992 l Foreword In 1992, CEN Rchnical Committee CEN/TC 185 Threaded and non threaded mechanical fasteners and accessories the secretariat of which is held by DIN decided to s
7、ubmit the International Standard IS0 8749 : 1986 - Pins and grooved pins - Shear test 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 at the latest by 1993-01-
8、3 1 and conflicting national standards shall be withdrawn at the latest by 1993-01-31. According to the CEN/CENELEC Common Rules the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Ne
9、therlands, Norway, Spain, Portugal, Sweden, Switzerland and United Kingdom. CEN EN*:28749 92 3404589 0033053 TO7 Page 3 EN 28749 : 1992 Pins and grooved pins - Shear test 1 Scope and field of application This International Standard specifies the test method for shear testing of metallic pins with no
10、minal diameters from 0,8 to 25 mm inclusive. 2 Principie The test consists of subjecting a pin to a double shear load using a suitable test fixture in a testing machine and recording the maximum load to fracture. 3 Test equipment and method The shear test is performed in a fixture (a typical fixture
11、 is shown in the figure) in which the pin support members and the member for applying the load have holes with diameters con- r Shear Load ,/ i Spacer Spacers and guides for shear block forming to the nominal pin size (tolerance H6) and a hardness of not less than 700 HV. The clearance between the s
12、upporting member and the load member shall not exceed 0.15 mm. The shear planes shall be at least one pin diameter away from each end and at least two diameters apart. Pins too short to be tested by double shear shall be tested by shearing two pins simultaneously in a single shear. Spring pins shall
13、 be mounted in the test fixture with the slot up- wards. Pins shall be tested to fracture. The maximum load applied to the pin coincident with or prior to pin fracture shall be regarded as the double shear strength of the pin. Pins tested for shear strength shall show a ductile shear without longitudinal cracks. The speed of testing shall not exceed 13 mm/min. Hardened support A block Figure - Typical pin shear test fixture
