1、DC 621.886.6 DEUTSCHE NORMEN April 1968 . w I - a blN 6887 Stressed-type Fastening8 with Taper Action Dimensions and Application Taper Keys with Gib Head Keyways SpMinungwerbindungen mit Anzug; Nasenkeile, Nuten, Abmessungen und Anwendung For connection with an IS0 Recommendation in conre of prepara
2、tion, see under Explanations. Dimensions in mm Sharr, eses remove8 (all round) J i” i- Chamfer Radius at manufacturers choi Radiusing of keyway bottom for shaft and hu Designation of a gib head taper key of width b = 18 mm, height h - 11 mm and length i-= 125 Xun: Gib head taper key 18 x I1 x 125 DI
3、N 6887 Table continued on page 2 Bor notes and footnotee, see page 2 Continued on page 2 Explanation8 on page 2 iinverkouf der Normbltter dur other grades of steel, e.g. quality steels and high grade steels, are to be specially agreed. ) Where mating dimensions are involved, particularly for shaft e
4、rtensione, it is essential that the correct correlation of key crosa-section to shaft diameter be observed. 2, In workshop drawings the dimenaions tl and (d - ti) M well as t2 and (d + t2) can be shorn side by aide. In ianj cases, however, the dimenaion. ti and (d + t2) are sufficient. At the ame ti
5、ia the permissible variations and machining allowances on the shaft and hub bore we to be trlren into account as appropriate. Intermediate lengths, if unavoidable, are to be chosen according to DIN 3. The permissible vhriations for the next greater length L are alwmy to be adopted in borderline case
6、s. Exrilanations The content of this Standard agrees essentially with the conclusions of Technioal Committee ISO/TC 16 “Keys“ on which the follodng IS0 draft ia bued: Draft I80 Rocouendation 190. 1085 Taper keys and their corresponding keyways, dth or without gib head Claretage pu clavettes inclines
7、 avec ou EMS talon Keile und Rasenkeile The following amendienta and additions should be noted compared with the February 1956 issue of DIB 6887: Soie of the keyw4 depths in shaft and hub hare been altered. They correspond with the depths for keys according to DIN 6886 u well a8 for feather keys ac
8、cording to DIN 6885 8heet 1. and with full UtiliZh- tion of the tolerances on keyway depth they ensure oversite of 0.1 U up to the 6 x 6 key 0.2 mm from the 8 X 7 up to 32 x 18 keyl and 0.3 mm from and including the 36 X 20 key referred each tiro to the nominal height of the key. The ralues for chul
9、ering and radiusing the keys and for radiusing the keyway bottom hava also been altered in aome c-ea, but no diificultj in regard to interchingerbiiitj meed be feared on thi8 accoimt . The former lengths 315 and 355 P have been replaced by length. 320 and 360 m. The gib heights h2 have been reduced for gib head keys from 63 x 32 and including the 90 x 45 size. The chulering of the gib head has been increased from 300 to 600.
