1、UDC 621.886.6 DEUTSCHE NORMEN September 1974 DIN for Constant Loads 271 Tangential Keys and Tangential Keyways Tangentkeile und Tangentkeilnuten fr gleichbleibende Beanspruchungen For connection with IS0 Draft ISO/DIS 3117-1973 published by the International Organization for Standardization (ISO), s
2、ee Explanations. Dimensions in mm Slope I: 100 1 Designation of a tangential key (consisting of 2 parts) of b = 24 mm calculated width, t, = 8 mi thickness and (. = 100 mm lengthl): Tangential key 24 x 8 x 100 DIN 271 22,5 23.2 I 24 I 8 p-1 25.6 Key S min. 1 may. For shaft diameter r v 7,3 8.3 9.3 1
3、0.3 11,4 Ke: t2 berm. var. min. 65 + 0.2 O max. 1 0,4 pq 90 140 150 Fable continued on page 2 ) The length Lis dependent upon the design in question and must be quoted. It is recommended that a length be chosen which is some 10 to I5 % greater than the length of the hub. Continued on pages 2 and 3 E
4、xplanations on page 3 Alleinverkauf der Normen durch Beulh Verlag GmbH, Berlin 30 und Kln 1 DIN 271 engl. Preisgr. 177 Ver1r:Nr. 0104 Page 2 DIN 271 Keyway Key S r min. tl I b For shaft diane ter d 160 I calculatedl hll 1 min. 192 2 I I 200 220 240 250 260 280 300 320 340 360 380 400 420 440 450 460
5、 may. 1 3 0,7 190 Haterial: St 60-2 according to DIN 17100 Other grades of steel, e.g., high-grade and fine steel, are to be specially agreed. In the case of values lying between the shaft diameters listed in the Table, it is recommended that the key thickness ti of the next smaller shaft diameter b
6、e selected. The width b is cal- culated from b = itl * (a - t,). For shaft diameters larger than 630 mm, t, = 0.07 d, b = 0.25 d are recommended. If alternating shock loads occur, tangential keys according to DIN 268 are recommended in the case of shaft diameters from 100 mm. The shaft diameters 67,
7、 71 and 125 according to IC0 Recommendation R 775 and the proposed IC0 Recommendation on tangential keys is not included in DIN 748 Part 1. DIN 271 Page 3 Application For dimensions d, t, t2 and b see pages 1 and 2 The two tangential keys can also be arranged at an angle of 180 should an angle Of la
8、o present assembly difficulties. Explanations The present Standard corresponds in substance to the IS0 Draft ISO/DIS 3117-1973 Tangential keying Clevetage par clavettes tangentielles As compared with the April 1924 Issue of DIN 271, the following amendments ond additions should be noted: a) The shaf
9、t diameters were partly changed to conform to IS0 Recommendation R 775 and also to correspond b) While existing cross-sections of keys and keyways have been retained, changes have in some cases been made in the slope of the keys and in the rounding of the bottom of the keyways. c) Shaft diameters ab
10、ove 630 mm have been omitted. Should it be necessary, however, tangential keys and keyways for larger shaft diameters can be determined from the formulae quoted. d) The contents of the Standard have been revised and supplemented, e.g., by the inclusion of an example of designation and details of materials. to DIN 748 Part I.
