DEUTSCHE NORM September 2005

DIN 1480 {

ICS 21.060.70

Together with DIN 34828:2005-09, supersedes DIN 1480:1975-09

Forged turnbuckles (open type)

Spannschlossmuttern, geschmiedet (offene Form)

Document comprises 6 pages

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

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

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Foreword

This standard has been prepared by Technical Committee FMV-AA 3.12.2 Spannschlösser of the Normenausschuss Mechanische Verbindungselemente (Fasteners Standards Committee).

The DIN 4000-2-8.4 tabular layout of article characteristics shall apply to turnbuckles covered in this standard.

NOTE Parts of DIN 4000-2 are intended to be superseded by DIN 4000-161, in which case the DIN 4000-161-6 tabular layout of article characteristics will apply to turnbuckles complying with this standard.

Amendments

This standard differs from DIN 1480:1975-09 as follows:

a) The title of the standard has been changed.

b) The scope of the standard has been amended.

c) Dimensional tolerances have been specified.

d) Measurement of coaxiality by gauging has been introduced (see clause 6).

e) Grade S235JR steel has been introduced.

f) Forging grade F in accordance with DIN EN 10243-1 has been specified.

g) For threads, tolerance 6H has been specified.

h) Clause 8 ‘Surface finish’ has been included.

i) The designation has been amended.

j) Specifications relating to loadability have been included.

k) Specifications for welding studs are no longer included (but see DIN 34828).

l) The designation of a complete turnbuckle (including turnbuckle nut and two welding studs) has been dropped.

Previous editions

DIN KrK 802: 1928-07 DIN 1480: 1928-07, 1935-03, 1975-09 DIN 1480-1: 1942x-04

1 Scope

This standard specifies requirements for M6 to M56 forged turnbuckles (open type) made of steel.

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2 Normative references

The following reference documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

DIN 4000-2:1999-12, Tabular layouts of article characteristics for bolts, screws and fit bolts

DIN 34828, Welding studs for turnbuckles

DIN EN 10025, Hot rolled products of structural steels — Technical delivery conditions

DIN EN 10243-1, Steel die forgings — Tolerances on dimensions — Part 1: Drop and vertical press forgings

DIN EN ISO 4042, Fasteners — Electroplated coatings

DIN EN ISO 10683, Fasteners — Non-electrolytically applied zinc flake coatings

DIN EN ISO 10684, Fasteners — Hot dip galvanized coatings

DIN ISO 965-2, ISO general purpose metric screw threads — Tolerances — Part 2: Limits of sizes for general purpose external and internal screw threads — Medium quality

3 Dimensions

Turnbuckle dimensions shall be as given in figure 1 and table 1.

a Turnbuckle nut with left-hand thread, marked by ‘L’ b Turnbuckle nut with right-hand thread (without marking)

Figure 1 — Turnbuckle dimensions (notation)

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Table 1 — Turnbuckle dimensions Dimensions in millimetres

Thread size (d1) M6 M8 M10 M12 M16 M20 M24 M30 M36 M42 M48 M56

Nominal dimension 12 15 18 21 27 34 39 45 55 63 80 80

max. 12,9 15,9 18,9 21,9 27,9 35,1 40,1 46,2 56,2 64,3 81,5 81,5d2

min. 11,5 14,5 17,5 20,5 26,5 33,5 38,5 44,4 54,4 62,3 79,3 79,3Nominal dimension 19 23 30 34 42 52 60 74 86 104 135 135

max. 19,9 23,9 30,9 35,1 43,1 53,1 61,1 75,2 87,2 105,3 136,7 136,7e

min. 18,5 22,5 29,5 33,5 41,5 51,5 59,5 73,4 85,4 103,3 134,3 134,3Nominal dimension 9 11 14 16 20 24 28 34 40 50 65 65

max. 9,5 11,5 14,5 16,5 20,5 24,5 28,5 34,6 40,6 50,7 65,7 65,7f

min. 8,1 10,1 13,1 15,1 19,1 23,1 27,1 32,8 38,8 48,7 63,5 63,5h min. 6 8 9 11 14 17 20 23 28 32 40 40

Nominal dimension 110 110 125 125 170 200 255 255 295 330 355 355

max. 111,1 111,1 126,2 126,2 171,3 201,3 256,3 256,3 296,7 332,1 357,1 357,1l1

min. 109,5 109,5 124,4 124,4 169,3 199,3 254,3 254,3 294,2 328,9 353,9 353,9m1 min. 12 15 18 21 27 34 39 45 55 63 78 78 m2 max. 6 8 9 11 14 17 20 23 28 32 39 39

Length of engagement ≈ 80 75 85 80 110 130 170 160 180 200 195 195

4 Material

Turnbuckles shall be made of grade S235JR steel as specified in DIN EN 10025.

5 Design

Turnbuckles shall be drop forged to forging grade F as specified in DIN EN 10243-1.

6 Coaxiality of bores

The coaxiality of bores shall be measured by means of a plug gauge as in figure 2 and table 2. The gauge shall pass through the bore in a vertical position under its own weight and without excessive force (see figure 2).

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Table 2 — Plug gauge dimensions Dimensions in millimetres

l2 d3 Thread size (d1) ≈ Nominal dimension Limit deviations

M6 120 4,83 00000120,,−

M8 120 6,54 00000150,,−

M10 150 8,23 00000150,,−

M12 150 9,94 00000180,,−

M16 200 13,64 00000180,,−

M20 220 17,09 00000210,,−

M24 260 20,54 00000210,,−

M30 260 25,93 00000210,,−

M36 300 31,33 00000250,,−

M42 350 36,75 00000250,,−

M48 380 42,10 00000250,,−

M56 380 49,52 00000250,,−

Key 1 Plug gauge 2 Turnbuckle

Figure 2 — Gauging of coaxiality

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7 Screw threads

The threads of turnbuckles shall be metric coarse pitch threads as in DIN ISO 965-2, produced to tolerance 6H.

8 Surface finish

DIN EN ISO 4042 shall apply with regard to electroplating.

DIN EN ISO 10684 shall apply with regard to hot dip galvanizing.

DIN EN ISO 10683 shall apply with regard to non-electrolytically applied zinc flake coatings.

9 Designation

Designation of an M12 forged turnbuckle (SP) with right-hand and left-hand thread:

Turnbuckle DIN 1480 — SP — M12

10 Connecting components

Welding studs for turnbuckles complying with this standard are covered in DIN 34828.

NOTE Connecting components which are not standardized at present may be used, this being subject to agreement. It should, however, be noted, that the loadability of such components does not necessarily comply with that of the turnbuckle.

11 Assembly and loadability

Turnbuckles complying with this standard shall be assembled with welding studs as specified in DIN 34828 which are made of the same steel (S235JR). The loadability of such assemblies is higher than that of the welding studs.

When using turnbuckles with connecting components made of other materials, in particular materials of higher strength, the loadability of the assembly shall be determined separately.

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