1、UDC 621.951.45-229.2-034.01 8.25 DEUTSCHE NORM May 1991 Continuous parallel shank solid hardmetal twist drills Dimensions c b m - DIN - 6539 - O x f o Vollhartrnetall-Spiralbohrer mit durchgehendem Zylinderschaft; Mae In keeping with current practice in standards published by the International Organ
2、ization for Standardization (ISO), a comma has been used throughout as the decimal marker. Dimensions in mm 1 This standard specifies requirements for continuous parallel shank solid hardmetal twist drills, .e. drills the shank of which is of the same diameter as the cutting end. Scope and field of
3、application 2 Dimensions and designation Details left unspecified are to be selected as appropriate Figure 1. Designation of a solid hardmetal twist drill with continuous parallel shank with a diameter, d, of 12 mm: ) Effective length. Twist drill DIN 6539 - 12 Continued on pages 2 and 3 DIN 6539 En
4、g/. Price group 6 SalesNo 0106 Beuth Verlag GmbH, Berlin, has the exclusive right of sale for German Standards (DIN-Normen). 02.92 Page 2 DIN 6539 55 Table 1. 22 17 119 123 60 39 62 40 131 66 42 Range of diameter, dl (h 7) Over 1 Up to 1,w I 2,12 138112 19 2,12 I 2,36 I 40 I 13 I 10 2,36 I 2,65 2,65
5、 I 3,OO I 49 I 18 I 14 3,OO I 3,35 3,35 I 3,75 I 52 I 20 I 15 3,75 I 425 5,30 6,OO 6,70 70 23 6,70 I 730 I 74 I 34 I 25 750 I 8,OO d2=d1 1 79 1 37 1 27 8,OO I 850 I 84 I 40 I 29 I 89 1 43 I 31 960 1 l0,OO 10,OO I 10,60 11,80 12,oo 12,OO I 13,20 1320 I 14,OO I 107 I 54 I 37 14,OO I l5,OO 15,OO I 16,O
6、O 16,OO I 17,OO 17,OO I 18,OO 18,OO I 19,OO I 127 I 64 I 41 19,oo I 20,oo 3 Material and 2 (at present at the stage of draft). The material of twist drills shall comply with the specifications given in DIN 6540 Parts DIN 6539 Page 3 d2 Over 6 Over 8 Over 10 Over 12 Over 14 Over 16 Up to 6 upto8 upto
7、10 upto12 upto14 upto16 upto18 S min. 1,4 1.6 2.0 22 22 2,s 23 4 Design The standard design of twist drills is without groove(s). If drills are to be provided with groove(s), this shall be indicated in the designation. Example of designation for a solid hardmetal twist drill with a diameter, l, of 1
8、2 mm. with groove: Twist drill DIN 6539 - K 12 Fluid delivery may be either by a central groove or by two grooves arranged symmetrically, at the manufacturers discretion, with the minimum wall thickness, s, specified in table 2, being maintained. Over 18 upto20 3,O w Figure 2. 5 Marking Marking of t
9、wist drills shall comply with the specifications given in DIN 6540 Parts 1 and 2. Standards referred to DIN 6540 Part 1 DIN 6540 Part 2 (at present at the stage of draft) twist drills; requirements (at present at the stage of draft) twist drills; testing Technical delivery conditions for DIN 6537 an
10、d DIN 6539 solid hardmetal Technical delivery conditions for DIN 6537 and DIN 6539 solid hardmetal Other relevant standards DIN 6537 IS0 513 : 1975 (at present at the stage of draft) Stepped parallel shank hardmetal twist drills; dimensions Application of carbides for machining by chip removal; designation of the main groups of chip removal and groups of application International Patent Classification B 23 B 51/02 B 23 B 51/06 B 28 D 1/14 0 27 G 15/00
