1、June 2011 Translation by DIN-Sprachendienst.English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 77
2、.140.60!$t+B“1810831www.din.deDDIN 6880Bright key steel Dimensions, tolerances, massEnglish translation of DIN 6880:2011-06Blanker Keilstahl Mae, zulssige Abweichungen, MasseEnglische bersetzung von DIN 6880:2011-06Acier tir froid pour clavettes Dimensions, tolrances, masseTraduction anglaise de DIN
3、 6880:2011-06SupersedesDIN 6880:1975-04www.beuth.deDocument comprises 11 pagesIn case of doubt, the German-language original shall be considered authoritative.01.12 DIN 6880:2011-06 2 A comma is used as the decimal marker. Contents Page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and
4、 definitions 4 4 Designation and details of ordering . 4 4.1 Designation . 4 4.2 Ordering details 5 5 Dimensions, tolerances on dimensions and shape, mass . 5 5.1 Dimensions and tolerances (thickness, width, chamfer and radiusing). 5 5.2 Straightness 5 5.3 Mass . 6 6 Material 8 7 Finish . 8 8 Form s
5、upplied . 8 9 Surface condition 9 10 Testing for dimensional accuracy. 9 Annex A (normative) Method for determining straightness 10 Bibliography . 11 DIN 6880:2011-06 3 Foreword This standard has been prepared by Subcommittee 21/1 Manormen fr Langerzeugnisse Blankstahl of the Normenausschuss Eisen u
6、nd Stahl (FES) (Iron and Steel Standards Committee). Amendments This standard differs from DIN 6880:1975-04 as follows: a) normative references and material designations have been updated; b) Figure 1 has been revised; c) the designations for dimensions according to EN 10278 and EN 10059 have been u
7、pdated (see Figure 1 and Table 1); d) ordering details have been updated; e) a method for determining straightness and specifications relating to surface condition have been included; f) Clauses 7 “Finish” and 8 “Form supplied” have been revised; g) more precise specifications have been given with r
8、egard to the tolerances of surface discontinuities; h) the standard has been editorially revised. Previous editions DIN 497: 1924-04, 1930x-04 DIN 498: 1924-04, 1929x-06 DIN 500: 1924-04, 1929x-06 DIN 6880: 1942-09, 1943-12, 1955-03, 1964-11, 1975-04 DIN 6880:2011-06 4 1 Scope This standard applies
9、to bright key steel (bright steel for producing taper keys and parallel keys, see Bibliography) in bars of square, rectangular or flat-rectangular cross section, with the nominal sizes given in Tables 1 and 2 and made of the steel grades specified in Clause 6. This standard does not apply to bright
10、steel products complying with DIN EN 10278 (round, square, hexagon and flat bars). 2 Normative references The following referenced 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
11、 referenced document (including any amendments) applies. DIN EN 10277-1:2008-06, Bright steel products Technical delivery conditions Part 1: General DIN EN 10277-2, Bright steel products Technical delivery conditions Part 2: Steels for general engineering purposes 3 Terms and definitions For the pur
12、poses of this document, the following term and definition apply. 3.1 bright key steel descaled steel which has been cold formed by non-cutting methods and which has a comparatively smooth, bright surface and an appropriately high dimensional accuracy; it is intended for producing taper keys and para
13、llel keys 4 Designation and details of ordering 4.1 Designation Bright key steel shall be manufactured with square, rechtangular or flat-rectangular cross section and with square edges (SK) or with edges broken all round (GK). a) square b) rectangular c) flat-rectangular d) edges broken all round (c
14、hamfer or radiusing) e) square edged Figure 1 Dimensions of bright key steel (notation) DIN 6880:2011-06 5 4.2 Ordering details The following details shall be specified by the purchaser at the time of enquiry and order: a) quantity (mass, number of bars) to be delivered; b) shape of the product (key
15、 steel); c) number of this standard (DIN 6880); d) symbol denoting the edge design, i.e. SK for square edges or GK for edges broken all round (chamfer or radiusing), (see Clause 7); e) dimensions (width and height); f) if lengths other than manufacturing lengths are required, the stock length or exa
16、ct length and length tolerances (see Clause 8); g) reference to the material standard including the number of the part (DIN EN 10277-2); h) steel name or material number (normally grade C45 with the material number 1.0503, see Clause 6); i) finished condition (normally symbol +C denoting drawn produ
17、cts, see DIN EN 10277-1); j) if a surface quality other than that conforming to class 1 as in DIN EN 10277-1 is required, the relevant surface quality class (see Clause 9). EXAMPLE 1 1 t key steel to DIN 6880 with square edges (SK), width b = 18 mm and thickness h = 11 mm, made of grade C45 steel (m
18、aterial number 1.0503) as in DIN EN 10277-2, finished condition drawn: 1 t key steel DIN 6880 SK 18 11 manufacturing length 3 000 DIN EN 10277-2 C45+C EXAMPLE 2 1 t key steel to DIN 6880 with edges broken all round (GK), width b = 56 mm and thickness h = 32 mm, cut to lengths of 3 000 mm with a tole
19、rance of 2 mm, made of grade C45 steel (material number 1.0503) as in DIN EN 10277-2, finished condition drawn: 1 t key steel DIN 6880 GK 56 32 exact length 3 000 5 DIN EN 10277-2 1.0503+C 5 Dimensions, tolerances on dimensions and shape, mass 5.1 Dimensions and tolerances (thickness, width, chamfer
20、 and radiusing) The preferred dimensions in which bright key steel is to be supplied and the permissible deviations are given in Tables 1 and 2. 5.2 Straightness Where specified at the time of enquiry and order and in cases of dispute, an agreed number of bars shall be checked for straightness in ac
21、cordance with the method specified in Annex A. The tolerances specified in Table 3 shall apply. DIN 6880:2011-06 6 5.3 Mass The values of mass given in the tables have been calculated from the cross section on the basis of a specific gravity of 7,85 kg/dm3. Table 1 Square key steel Dimensions in mil
22、limetres Product form Nominal size a a Permissible deviation for a according to ISO tolerance zone h9 0 Edge radius r Mass kg/m min. max. Square 2 2 0,025 0,15 0,35 0,031 4 3 3 0,070 7 4 4 0,030 0,126 5 5 0,2 0,4 0,196 6 6 0,283 7 7 0,036 0,385 8 8 0,503 10 10 0,4 0,6 0,785 12 12 0,043 1,13 14 14 1,
23、54 16 16 2,01 18 18 2,54 20 20 0,052 0,6 0,8 3,14 22 22 3,80 DIN 6880:2011-06 7 Table 2 Rectangular and flat-rectangular key steel Dimensions in millimetres Product form Nominal size w t Permissible deviation for Edge radius r Mass kg/m w t according to ISO tolerance zone min. max. h9 0. h9 0. h11 0
24、. Rectangular 8 7 0,036 0,090 0,2 0,4 0,440 10 8 0,036 0,4 0,6 0,628 12 8 0,043 0,754 12 10 0,943 14 9 0,090 0,989 16 10 1,26 18 11 0,110 1,55 20 12 0,052 0,6 0,8 1,88 22 14 2,42 25 14 2,75 25 22 0,130 4,32 28 16 0,110 3,52 28 25 0,130 5,50 32 18 0,062 0,110 4,52 32 30 0,130 7,54 36 20 1 1,2 5,65 36
25、 34 0,160 9,61 40 22 0,130 6,91 40 38 0,160 11,9 45 25 0,130 8,83 45 43 0,160 15,2 50 28 0,130 11,0 50 48 0,160 18,8 56 32 0,074 1,6 2 14,1 63 32 15,8 70 36 19,8 80 40 2,5 3 25,1 90 45 0,087 31,8 100 50 39,3 Flat- rectangular 5 3 0,030 0,060 0,2 0,4 0,118 6 4 0,075 0,188 7 4 0,036 0,030 0,220 8 5 0,
26、314 10 6 0,4 0,6 0,471 12 6 0,043 0,075 0,565 14 6 0,659 16 7 0,090 0,879 DIN 6880:2011-06 8 Table 2 (continued) Product form Nominal size w t Permissible deviation for Edge radius r Mass kg/m w t according to ISO tolerance zone min. max. h9 0. h9 0. h11 0. Flat- rectangular 18 7 0,043 0,090 0,4 0,6
27、 0,989 20 8 0,052 0,6 0,8 1,26 22 9 1,55 25 9 1,77 28 10 2,20 32 11 0,062 0,110 2,76 36 12 1 1,2 3,39 40 14 4,40 Table 3 Deviation from straightness Dimensions in millimetres Product form Nominal size Deviation from width from thickness Square key steel b 22 2,0 2,0 Rectangular and flat-rectangular
28、key steel b 100 1,5 2,0 6 Material For bright key steel complying with this standard the steel grades specified in DIN EN 10277-2 shall apply. Grade C45 steel, material number 1.0503, finished condition +C (drawn steel) is normally used. 7 Finish Key steel complying with this standard is normally su
29、pplied with square edges. Square-edged steel products may have an undefined profile within a distance of 0,2 mm from the hypothetical edge. Where specified at the time of enquiry and order, key steel products shall be supplied with edges broken all round. Unless otherwise specified at the time of en
30、quiry and order, chamfer or radiusing shall be at the manufacturers discretion within the limits specified in Tables 1 and 2. 8 Form supplied Key steel shall be supplied in manufacturing lengths of 3 000 mm to 4 000 mm or in stock lengths of 3 000 mm to 3 200 mm or 6 000 mm to 6 200 mm. Other length
31、s, such as exact lengths for example, and their permissible deviations shall be agreed at the time of enquiry and order. DIN 6880:2011-06 9 9 Surface condition The surface condition of the products shall be in accordance with one of the classes specified in DIN EN 10277-1:2008-06, Table 1. Unless ot
32、herwise specified at the time of enquiry and order, key steel products shall be delivered in surface quality class 1. The depth of surface discontinuities such as pores, pits and grooves, measuring the actual deviation, shall not exceed ISO tolerance class h11. Any additional requirements, e.g. perc
33、entage contact area, may be agreed at the time of enquiry and order. 10 Testing for dimensional accuracy The number of bars on which dimensional accuracy shall be checked on despatch from the manufacturer shall be at the manufacturers discretion, unless otherwise agreed. In the case of manufacturing
34、 lengths and stock lengths, the check shall be carried out at a distance not less than 150 mm from the end of the bar. If exact lengths are supplied on the basis of a special agreement, the check shall be carried out at a distance not less than 10 mm from the end of the bar. DIN 6880:2011-06 10 Anne
35、x A (normative) Method for determining straightness A.1 Method for determining straightness A.1.1 The bar shall be supported on a suitable surface so as to eliminate or minimise sagging. A.1.2 A 1 m long straight edge shall be placed on the surface of the bar at any position along its length. No par
36、t of the straight edge shall be within 150 mm of the ends of the bar. A.1.3 Straightness shall be determined by measuring the maximum gap between the bar and the straightedge by suitable means, e.g. a feeler gauge. The bar shall be deemed straight where the maximum gap does not exceed the values spe
37、cified in Table 3. DIN 6880:2011-06 11 Bibliography DIN 138, Metal-cutting tools Bores, keyways and driving features for tools with parallel bore and 1 in 30 taper bore DIN 6881, Taper key torque transmission Saddle keys Dimensions and application DIN 6883, Taper key torque transmission Parallel key
38、s Dimensions and application DIN 6884, Taper key torque transmission Gib-head parallel keys Dimensions and application DIN 6885-1, Drive type fastenings without taper action Parallel keys, keyways, deep pattern DIN 6885-2, Drive type fastenings without taper action Parallel keys, keyways, deep patte
39、rn for machine tools Dimensions and application DIN 6885-3, Drive type fastenings without taper action Parallel keys, shallow pattern Dimensions and application DIN 6886, Stressed-type fastenings with taper action Taper keys, keyways Dimensions and application DIN 6887, Stressed-type fastenings with
40、 taper action Taper keys with gip head, keyways Dimensions and application DIN 6889, Taper key torque transmission Gib-head saddle keys Dimensions and application DIN EN 10277-5, Bright steel products Technical delivery conditions Part 5: Steels for quenching and tempering DIN EN 10278, Dimensions and tolerances of bright steel products
