8749 International Standard (ISo INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONOMEXAYHAPOAHAA OPIAHM3ALMA HO CTAHAAPTW3AWM·ORGANISATION INTERNATIONALE DE NORMALISATION Pins and grooved pins -- Shear test Goupilles et goupilles cannelees - Essai de cisaillement First edition - 1986-11-01 sO 8749-1986 (E) UDC 621.886.1 : 620.176 Ref. No. ISO 8749-1986 (E) Descriptors : fasteners, pins (mechanics), spring pins, grooved pins, tests, shear tests, test equipment. Price based on 1 page national Organization for Standardization Not for Resale Foreword national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern mental and non-governmental, in liaison with Iso, aiso take part in the work. the member bodies for approval before their acceptance as International Standards by the IsO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. Fasteners. Users should note that all international Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. InternationalOrganizationforStandardization,1986 Printed in Switzerland by IHS under license with IS Not for Resale ISO8749-1986 (E) INTERNATIONALSTANDARD Pins and grooved pins - Shear test 1 Scope and field of application forming to thenominal pin size (tolerance H6)and a hardness of not iess than 700 HV. This International Standard specifies thetest methodfor shear testing of metallic pins with nominal diameters from 0,8 to The clearance betweenthesupporting member andtheload member shall not exceed 0,15 mm. The shear planes shall be at 25mm inclusive. leastonepindiameterawayfromeachendandatleasttwo diametersapart.Pins too short to be tested by double shear shall be tested by shearing two pins simultaneously in a single 2 Principle shear. The test consists of subjecting a pin to a double shear load Springpins shall bemounted inthetest fixturewiththeslotup- using a suitable test fixture in a testing machine and recording wards. the maximum load to fracture. '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. 3Test equipment and method Pins tested for shear strength shall show a ductile shear The shear test is performed in a fixture (a typical fixture is without longitudinal cracks. shown in the figure) in which the pin support members and the member for applying the load have holes with diameters con- Thespeedoftestingshall notexceed13mm/min. Load Shear block Hardened bushings Load Hardened shear biock Pin ? Hardened support block Fixture Spacer Spacers and guides for shear block Figure -- Typical pin shear test fixture Copyright International Organization for Standardization No reproduction or networking permitted without license from IHS Not for Resale