1、i f c 8 UDC 621.886.6 DEUTSCHE NORMEN December 1967 DIN 6686 Stressed-type Fastenings with Taper Action Dimensions and Application Taper Keys Keyway8 Spanuwsverbhdungen nit An5ug; Keile, Huten, Abmessungen und bnwendung For connection rith an IS0 Recommendation in courBe of preparation, nee under Ex
2、planationa. Dimeneions in mm ibr- Alleinverkauf der Normbltter dur other grades of steel, e.g. quality eteele and high-grade steels, are to be specially agreed. Where mating dimensions are involved, particularly for shaft extensions, it is essential that the correct correlation of key cross-section
3、to shaft diameter be observed. In workshop drawings the dimensions tl and (d - t,) as well as t2 and (d + t2) can be shown side by side. In many cases, however, the dimensions t, and (d + t permissible variations and machining allowances on the shah and hub bore are to be taken into account as appro
4、priate. Intermediate lengths, if unavoidable, are to be chosen according to DIN 3. The permissible variations for the next greater length 1 are always to be adopted in borderline cases. are sufficient. At the same time the Explanations The content of this Standard agrees essentially with the conclus
5、ions of Technical Committee ISO/TC 16 “Keys“ on which the following IS0 draft is based: Draft IS0 Recommendation No. 1085 Taper key6 and their corresponding keyways, with or without gib head Clavetage par clavettes inclines, avec ou sans talon Keile und Nasenkeile The following amendments and additi
6、ons should be noted compared with the February 1956 issue of DIN 6886: a) b) C) d) - Some of the keyway depths in shaft and hub have been altered. They correapond with the depths for feather key6 according to DIN 6885 Sheet 1 and with full utilization of the tolerances on keyway depth they enaure oo
7、ersi%e of 0.1 mm up to the 6x6 key 0.2 mm from the 8 x7 up to 32x18 key, and 0.3 mi from and including the 36x20 key referred each time to the nominal height of the key. The values for chamfering and radiusing the keys and for radiusing the keyway bottom have been altered in some cases, but no difficulty in regard to interchangeability need be feared on this account. The former lengths 315 and 355 mm have been replaced by lengths 320 and 360 mm. The material data have been taken over from the new issue of DIN 6880.
