229 NTERNATIONAL STANDARD TSO INteErNaTIOnAL ORGANIZATIoN FoR STaNDaRDizATION MEKiyHAPOiHAn OPrAHH3AiH HIO CTAHaaPTH3ALHH ORGANISATIoN INTERnATIonaLE DE NoRMALisATION Machine tools -- Speeds and feeds First edition - 1973-12-15 UDC 621.9.06 - 185 Ref. No. ISO 229-1973 (E) SO 229-1973 (E) Descriptors : machine tools, rotation, velocity, machine tool feeds, utilization, performance evaluation. Price based on 4 pages tted without licensefrom 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 Internationai Standards is carried out through IsO Technical Committees. Every up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in liaison with IsO, also take part in the work. Draft Internationat Standards adopted by the Technical Committees are circulated to the Member Bodies for approvai 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 documents are now in the process of being transformed into International Standards. As part of this process, Technical suitable for transformation. International Standard iSO 229 therefore replaces ISO Recommendation R 229-1961. countries : Belgium Germany Romania Burma Hungary South Africa, Rep. of Czechoslovakia Italy Sweden Denmark Pakistan Switzerland Finland Philippines United Kingdom Poland U.S.S.R. France The Member Bodies of the. following countries expressed disapproval of the Recommendation on technical grounds : Netherlands U.S.A.* The Member Body of the following country disapproved the transformation of ISO/R 229 into an International Standard : United Kingdom Subsequently, this Member Body approved the Recommendation. @ Internationat Organization for Standardization, 1973 : Printed in Switzerland Copyright International Organization for Standardization ed without license from IHS Not for Resale INTERNATIONAL STANDARD ISO 229-1973 (E) Machine tools - Speeds and feeds 2.2 The permissible limits for the actual values have been 1 SCOPE AND FIELD OF APPLICATION determined not from the basic values, but from the This International Standard specifies the speeds (number of corresponding theoretical values of the geometric series revolutions or strokes per minute) and the feeds (in millimetres or in inches, per minute, per revolution, or per with ratio stroke) of machine tools working by removal of metal and The limits of tolerance, compared with these theoretical driven directiy by an electrical motor. values, are given in table 1. It is not applicable, for obvious technical reasons, to machines with continuous speed variations, feeds for thread TABLE 1 -- Limits of tolerances forming,etc. Toterance % Tolerance % for feeds for speeds 2 GENERALITIES number of millimetres inches revolutions millimetres inches per per or strokes per minute per minute revolution revolution per minute or per stroke elor per stroke 2.1 The basic vatues of the speeds, as well as those of the - 2 - - 2 2 - 3 feeds, are taken from the R 20 series of preferred numbers + 6 + 6 + 5 + + 2 (see ISO 3) Copyright International Organization for Standardization ed without license from IHS Not for Resale