TSo NTERNATIONAL STANDARD 1050 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION·MEKIYHAPOIHA OPTAHW3AIW IO CTAHIAPTH3ALIMM.ORGANISATION INTERNATIONALE DE NORMALISATION Continuous mechanical handling equipment for loose bulk materials -- Screw conveyors Engins de manutention continue pour produits en vrac --- Transporteurs a vis First edition -- 1975-10-15 OCT 2 1975 ANs rermut D seot UDC 621.867.4 Ref. No. IS 1050-1975 (E) Descriptors : handling equipment, continuous handling, bulk products, conveyors, screw conveyors, dimensions. Price based on 2 pages Copyright International Organization for Standardization from IHS Not for Resale FOREWORD Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (IsO Member Bodies). The work of developing International Standards is carried out through ISo Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with tsO, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as international Standards by the iso Council. Prior to 1972, the results of the work of the Technical Committees were published as Iso Recommendations; these doucments are now in the process of being transformed into International Standards. As part of this process, Technical Committee ISO/TC 101 has reviewed ISO Recommendation R 1050 and found it technically suitable for transformation. Internationat Standard ISO 1050 therefore replaces IS0 Recommendation R 1050-1969 to which it is technically identical. isO Recommendation R 1050 was approved by the Member Bodies of the following countries : Belgium Germany Poland Brazil Greece South Africa, Rep. of Canada India Sweden Israel Chile Switzerland Italy Czechoslovakia Turkey Egypt, Arab Rep. of Japan United Kingdom U.S.S.R. Finland Korea, Rep. of France Netherlands Yugoslavia The Member Body of the following country expressed disapproval of the Recommendation on technical grounds : U.S.A. No Member Body disapproved the transformation of ISO/R 1050 into an International Standard. @ International Organization for Standardization, 1975 Printed in Switzerland Copyright International Organization for Standardization nse from IHS Not for Resale INTERNATIONAL STANDARD ISO 1050-1975 (E) Continuous mechanical handling equipment for loose bulk materials -- Screw conveyors 1 SCOPE AND FIELD OF APPLICATION This International Standard lays down the recommended values of the main dimensions of the screw conveyors' elements. 2 REFERENCES ISO 496,Drivingand drivenmachines--Shaft heights ISO/R 775, Cylindrical and 1/10 conical shaft ends. 3 DEFINITIONS Section A-A A - Shaft - Trough Gland Shaft end Helical screw 3.1Helical screw 3.1.1 nominal diameter : The outside diameter, D, of the helical screw. 3.1.2 pitch : The pitch, S, of the helical screw. 3.2 Shaft 3.2.1 constitution : The shaft of the helical screw may be made either solid (p d,), or partly solid (p d,) and partly tubular (Φd2). 3.2.2 shaft end : The driven end of the shaft ( d3). 3.3 Trough 3.3.1 shaft height : The height H of the shaft centre line above the foot of the trough support. 3.3.3 clearance : The radial clearance z between the helical screw and the interior of the cylindrical part of the trough. e from IHS Not for Resale