1、Ref. No. DIN 6304 : 2002-06English price group 06 Sales No. 010603.03DEUTSCHE NORM June 20026304Continued on pages 2 to 4. No part of this translation may be reproduced without the prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the ex
2、clusive right of sale for German Standards (DIN-Normen).Tommy screws with fixed barTranslation by DIN-Sprachendienst.In case of doubt, the German-language original should be consulted as the authoritative text.ICS 21.060.10Knebelschrauben mit festem KnebelIn keeping with current practice in standard
3、s published by the International Organization for Standardization(ISO), a comma has been used throughout as the decimal marker.ForewordThis standard has been prepared by Technical Committee Bohrbuchsen, Spannzeuge und Vorrichtungen ofthe Normenausschuss Werkzeuge und Spannzeuge (Tools and Clamping D
4、evices Standards Committee).AmendmentsThis standard differs from the January 1981 edition as follows:a) General tolerances shall be those specified in ISO 2768-1.b) The required case hardening depth and surface hardness of thrust pads have been amended.c) The standard has been editorially revised.Pr
5、evious editionsDIN 6304: 1931-12, 1940-05, 1954-10, 1970-04, 1980-07, 1981-01.All dimensions are in millimetres.1 ScopeThis standard specifies requirements for tommy screws with fixed bar for use with nuts in jigs and fixtureswhere the required torque is relatively small.Supersedes January 1981editi
6、on.Page 2DIN 6304 : 2002-062 Normative referencesThis standard incorporates, by dated or undated reference, provisions from other publications. These norma-tive references are cited at the appropriate places in the text, and the titles of the publications are listed below.For dated references, subse
7、quent amendments to or revisions of any of these publications apply to thisstandard only when incorporated in it by amendment or revision. For undated references, the latest edition ofthe publication referred to applies.DIN 76-1 Thread run-outs and thread undercuts for ISO metric screw threads in ac
8、cordance with theDIN 13 seriesDIN 267-2 Fasteners Technical delivery conditions Product grades and tolerancesDIN 6311 Thrust padsDIN EN ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel Part 1: Bolts,screws and studs (ISO 898-1 : 1999)ISO 2768-1 : 1989 General toleran
9、ces Part 1: Tolerances for linear and angular dimensions without indi-vidual tolerance indications3 Dimensions and designationTommy screw dimensions shall be as given in figures 1 and 2 and table 1.Design details left unspecified shall be selected as appropriate.General tolerances shall be class m t
10、olerances as in ISO 2768-1.Key1 Screw2 Tommy bar1) x1as in DIN 76-1.Figure 1: Dimensions of tommy screw with fixed bar(type E, without thrust pad) (notation)Page 3DIN 6304 : 2002-06Key1 Thrust padOther dimensions as for type E.Figure 2: Tommy screw with fixed bar(type F, with thrust pad as in DIN 63
11、11)Designation of an M 10 tommy screw (M 10) of type E (E) with a length, l1, of 60 mm (60):Tommy screw DIN 6304 E M 10 60Table 1: Tommy screw dimensionsPage 4DIN 6304 : 2002-06Table 2: Designation4 MaterialsTommy screws shall be of property class 5.8 as specified in DIN EN ISO 898-1.5 Design and fi
12、nishTommy screws shall be produced to tolerance class m as in DIN 267-2.Thrust pads shall be case hardened to a depth of (0,3 + 0,2) mm (440 HV 1), with a hardness of (550 + 100) HV 10,and provided with a black oxide coating.Other relevant standardsDIN 6305 Tommy nuts with fixed barDIN 6306 Tommy screws with movable barDIN 6307 Tommy nuts with movable barNo.TypeETypeFQuantityName ofelementDesignation of screw for thread sizeScrewThrustpad1) Length l1to be inserted.
