DIN 508-2002_Nuts for T-Slots

June 2002

D EUTSCHE NORM NORM

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Nuts for T-slots

508 Supersedes January 1997 edition.

ICS 21.0 21.060.2 60.20 0 Muttern für T-Nuten

In keeping with current practice in standards published by the International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker.

Foreword This standard has been prepared by the Normenausschuss Werkzeuge und Spannzeuge (Tools and Clamping Devices Standards Committee), Technical Committee Bohrbuchsen, Spannzeuge und Vorrichtungen. Vorrichtungen .  Ame ndm ndment ent s This standard differs from the January 1997 edition in that marking details have been changed and the standard has been editorially revised. Previous editions DIN 508: 1924-01, 1928-01, 1956-05, 1969-10, 1977-06, 1979-02, 1991-04, 1997-01.

Introduction This standard standard conforms conforms in substance substance to Internationa Internationall Standard Standard ISO 299 : 1987. In conjunction with DIN 6379 studs, nuts for T-slots form clamping elements similar similar in function to the T-head bolts specifi specified ed in DIN 787. DIN 267-4 (withdrawn), upon which the April 1991 edition of this standard was was based, was superseded by DIN EN 20898-2. However, neither neither the property classes specified in the latter standard nor the hardness classes specified in DIN 267-24 apply because the T-nuts specified here are not compatible with conventional nuts. Instead, T-nuts as specified in this standard shall be subjected to tensile testing using the proof loads specified in table 1 (cf. figure 2). To utilize the bearing capacity of T-nuts, full-length engagement of the stud is essential. It should be noted that, when determining the bearing capacity of the assembly, allowance must be made for the reduced wall thickness of the shank.

Continued on pages 2 to 4.

Translation by DIN-Sprachendienst. In case of doubt, the German-language original should be consulted as the authoritative text.

© No part of this translation translation may be reproduced reproduced without the prior prior permission of DIN Deutsches Institut Institut für Normung e. V. V.,, Berlin. Beuth Verlag GmbH, GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen) (DIN-Normen)..

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Sale Sa les s No No.. 00 0006 06 01.03

P ag ag e 2 D IN IN 5 08 08 : 2 00 00 22- 06 06  All dime dimensio nsio ns are in mill imet imetres. res.

1

Sco p e

This standard specifies nuts nuts for T-slots, which are elements elements for use with DIN 6379 studs, for mounting workpieces or fixtures in T-slots as specified specified in DIN 650 on machine tool tables, workholding workholding plates, and in workholding fixtures and toolholders.

2

Norm No rmat ativ ive e re refe fere renc nces es

This standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the titles of the publications are listed below. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references, the latest edition of the publication referred to applies. DI N 2 67 67- 4 DI N 2 67 67- 24 24 DI N 6 5 0 DI N 7 8 7 DIN 63 6 379 DIN DI N EN 208 2089898-2 2 I SO SO 2 99 99 : 1 98 98 7 ISO 276 2768-1 8-1 : 198 1989 9 DIN EN ISO 47594759-1 1

3

F as as te te ne ner s – Te Tec hn hn ic ica l d el el iv iv er er y c on on di di ti ti on on s – Pr Pr op op er ert y cl as as se ses fo fo r n ut uts (p (pr ev ev io io us us cl cl as as se se s) s) F as as te te ne ner s – T ec ech ni ni ca cal d el el iv iv er er y c on on di dit io io ns ns – Pr op op er ert y cl as as se ses f or or n ut ut s D i me n si o ns o f T - s l o t s f o r m ac h in e to o l t ab l es T - he a d b o l t s S t u ds f o r u s e wi t h T - n u ts Mech Me chan anic ical al pr prop oper erti ties es of fa fast sten ener ers s – Pa Part rt 2: Nu Nuts ts wi with th sp spec ecif ifie ied d pro proof of lo load ad va valu lues es – Coarse Coa rse thr thread ead (IS (ISO O 898 898-2 -2 : 199 1992) 2) M ac ac hi hi ne ne to to ol ol ta ta bl bl es es – T -s -s lo lo ts ts an and co co rr rre sp sp on on di di ng ng bo bo lt lt s Genera Gen erall tolera tolerance nces s – Part Part 1: Tolera Tolerance nces s for linea linearr and angu angular lar dime dimensi nsions ons with without out indi indi-vidual tolerance indications Tolera Tol erance nces s for faste fastener ners s – Part Part 1: Bolts, Bolts, scre screws, ws, stud studs s and nuts nuts – Prod Product uct grad grades es A, B and an d C (ISO (ISO 47 4759 59-1 -1 : 20 2000 00))

Dimens Dim ension ions, s, pro proof of loa loads ds and des design ignati ation on

Nuts for T-slots shall have dimensions and resist proof loads as specified in table 1 (cf. figures 1 and 2). Design details not given here remain unspecified. For general tolerances, tolerance class m as specified specified in ISO 2768-1 shall apply.

Figu Fi gure re 1: TT-nu nuts ts

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a )

Slot dime dimensio nsio ns as in DIN 650 650.. Figure Figu re 2: Tensi Tensile le testing testing of nuts nuts for T-slo T-slots ts

Designation of an M16 nut for T-slots with  a equal to 18 18 mm:

Nut DIN DIN 508 – M16 é 18 Table Tab le 1: Di Dimen mensio sions ns and proof proof loads loads

Limit deviations

4 4.1

Limit deviations

Approx. Size of Proof load, mass T-slot F min, Limit per unit, as in in deviain g DI DIN N 65 650 0 10 3 N tions

Mate Ma teri rial al an and d ha hard rdne ness ss M a t er ia l

The steel used for nuts for T-slots shall be at the manufacturer’s discretion.

4 .2

Hardness

Size M4 nuts shall have a Vickers hardness of 170 HV or greater, size M5 up to M36 nuts, a hardness of 188 HV or greater, and nuts of sizes greater than M36 shall have have a hardness of 180 HV or greater.

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5

T o l e r a nc e s

Nuts for T-slots shall be manufactured manufactured in product grade A in accordance with DIN EN ISO 4759-1.

6

Ma rki ng

 As a rule, r ule, nut nuts s shal s halll be b e marke ma rked d with w ith the DIN symb ol in a durab d urable le mann er. The mark ing shal l be b e easy e asy to read read.. If marking is not possible for lack of space, the smallest commercially available packaging unit shall bear the marking.

Other relevant standard DIN DI N 63 6330 30

Metr Me tric ic he hexa xagon gon nu nuts ts 1, 1,5 5 d high