Din-6888-wood Ruff Key Dim And Applicatioin

DEUTSCHE NORMEN

UDC 621.886.6 Drive Type

August 1956

DIN

without Taper Aotion Woodruff JCeys Dimensions and Application ~astenings

6888

Kitnehmerverbindungen ohne Anzug; Soheibenfedern, Abmeeeungen und Anwendung Dimensions in mm

: t Designation of a Woodruff key of width b "' 4 mm and height h == 5 mm: Woodruff key 4 x 5 DIN 6888

..,·=.

-.::

.~ :>

-6

!ia

.

Cross-section of WoodWidth b h9 1 ruff key (Half-round steel according to DIN 6882) Height h h12 1,4 Allocation1)

c

I

tor shaft diameter d 1

above up to

3 4

II

tor shaf't diameter d1

above

6 8

~

0

z ...c

-6

!!

...:> c

...

"0

Dl

c

:>

Dl

·e

...

..c

c

C)

-~ 5 c

..·c; ~

Dl

:>

!:!:> a

-6:> a

-iS:>

-o-6 a

BEST BeuthStandardsCollection - Issue 2016-11

z

'S't

i~

~! caa ~Q N

~

•

c:

:! ..

.

.:e

o.

:

-6

~

c:•"-

~~cl

•!ec: -6 c:

Diameter Chamf'ering or radiusing

up to

d, Perm.var.

1,5 2,6

2

I 3,7

2,6

4

6

6

8 10 12

4

8 10 7

- 0,1

- 0,1

0,2 ~ Perm.var. +0,1

Length

Radius at bottom of kexway in shaft and hub

Breaking of corners (all-round) Chamfering Radiusing at manufacturer's choice

I

7

2,5 •)I 3,7 3,7 8 10

I

3 5

4

6,5

-

5

I 6,5 10 12

-

10

10

I

22 13

16

13 1 16

- 0,1

- 0,1

- 0,1

0,2

0,2

0,2

0,2

0,2

+0,1

+ 0,1

+ 0,1

+ 0,1

+0,1

6,76 I 9,66 9,66 9,66 112,65 1572 12,6511572 18,57 0,153 0,2041 0,414 0,518 0,6221 1~10 1,80 1,47 I 2.40 3,27

616

1

1,5

1 1

2

"'

+ 0,1

+ 0,1

4

7

."'

1

1,5

2

2,5

3

4

0,6 0,6

0,8 0,8

1 1

1 1

1,4 1,1

1l

+0,1

+ 0,1

+ 0,1

+0,1

+ 0,1

+ 0,1

0,2

0,2

0,2

0,2

0,2

0,2

- 0,1

- 0,1

- 0,1

- 0,1

- 0,1

- 0,1

:r •..>.

.l4

Depth

+>

t })

Series A Series B .... 1 Perm.var. f'or A and B ~ l:ll Diameter d2 + 0.5 P9 Width Tight fit >. b2) Sliding f'it J9 b) >. l! Depth Series A.. ) .0 Series V) t }) 2 ~ Perm.var. f'or A and B Radius at bottom ot keyway Perm.var •. *) Only f'or automot~ve applications

r,

19

- 0,1

3,82 0,031

/""' Weight (7.85 kg/dm}) kg/1000 pieces"" Width Tight f'it P9 b2) Sliding tit N9

-

17

12 17 10

7,5

2

2

2,5

12,9 12.9

2,9

2,s

2,9

2,s

1,8 1,8

+ 0,1

I

1

I 3,s I 4,1

+ 0,1

10

10

4

3

5,6

3,5 4,1

I 5 I 5,6

16

13

I

5,3

+ 0,1

10

I

13

6 6,6

+0,1

16

19

1,1

Material: St 60 (steel having a tensile strength of at least 60 kg/mm2 in the finished condition) ·--------- alternative materials to be specified in order 1) Where corresponding dimensions are involved, particularly f'or shaft extensions, allocation of the Woodruff key cross-sections appropriate to the shaft diameters concerned must be observed. Allocation I applies in all cases where the Woodruff key is used in the role of a feather key, i.e. to transmit the whole of the torque. Allocation II applies in all cases where the Woodruff key is used solely for locating the driving element, other elements, e.g. cotters or tapers being employed to transmit the torque. 2) The listed permissible variations for keyway widths are intended for guidance only. It is recommended that for the widths of broached keyways ISA Class IT 8 be observed instead of IT 9 (similarly P8 instead of' P9, N8 instead of N9 and J8 instead of' J9). }) In workshop drawings the dimensions t1 and (d1 - t1), also t2 and (d1 + t2) may appear side by side; however, in many cases the dimensions t1 and (d1 + t2> will suffice. In this connection it may be necessary to allow for permissible variations and machining allowances on the shaft and hub bore. 4) Pref'erence should be given to Series A (deep hub keyway); this conforms to DIN 6885 Sheet 1 (t 2 with back clearance). 5) Series B (shallow hub keyway) for machine tools; this conforms to DIN 6885 Sheet 2. 6) When the relationship between the Woodruff key and the shaft diameter is based on Allocation II it is permissible to use tolerance zone D 10 aleo.

Continued on page 2

2 0 xCJ .......

Alleinverkauf der Normbliitter durc:h Beuth-Vertrieb GmbH, Berlin 30 und Koln

DIN 6888 engl. Preisgr.2

Page 2 DIR 6888 Dimensions in ma

Designation of a Woodruff key of width b • 8 mm and height h = 11 mm: Woodruff key 8 x 11 DIR 6888

diameter d 1

above up to

for ahaft II diameter d1

above up to

I for shaft

Diameter

d2

7,5

.__

W&

~·

9

7,5

(10)

9

22

Perm.var.

19

22

19

- 0,1

22

11

9

-

-

30

13

11

13

22

-

30 38

30

16

11

17 22

-

10

8

6

-

12 17

Radius at bottom of kel!aY in shaft and hub

"i~acturo~choico

5

Cross-section(of Width b h9 Woodruff key Halfround steel6!3c~rding to DIN 2 Height h h12 6,5 Alloca· tion1)

Breaking of corners (ail-round) . Chamfering Radiuaing

16

-

30 38 38

25

28 -0,2

- 0,1

22

28

32

28

32

45

-0,2

-0,2

- 0,1

0,2 0,4 0,4 Chamf•ring or Clt_4 radiusing Perm.var. + 0,1 + 0,2 +0,2 + 0.2 Length I~ 15l2 18,57 21,63 18,57 21,63 24,49 27;J5 2163 27;J5 31,43 27;J5 31,43 43,08 Weight 3,01 4,09 5,73 4,91 6,88 8,64 10,6 9,17 14,1 19,3 17,6 24,1 39,9 (7,8.5 kg/duh kg/1000 P• :::,:

"

=.•""

•

.!4

......

•

A 1'/J

....

=.•

•

.!4 ~

.lJ

Width b2)

Tight fit P9 Sliding tit 119 Depth Series A Series B t 1'> tperm. var. for A and l Diameter d2 + 0 • .5 Width Tight fit P9 b2) Sliding fit J9 b) Series A'+) Depth Perm.var. for A Series P) t 2'> Perm.var. forB

Radius at bottom of keyway

'2. Permevar.

5 4,5 5,4

5,5

7

6,4

7,9

+ 0,1

16

6

5,1

6,6

7,6

6

7,5

8,5

+0,1

+D.2

19 5

22

19

8,6 9,5

6,2

7,5

+0,2

25

22 6

10

8 8,2 9,5

10,2 11,5

7,8 9,1

32

28

22

28 8

12,8 14,1

+ 0,2

+ 0.2

28

9,8 11,1 32

45

10

2,2

2,6

3

3,4

+0,1

+ 0,1

+ 0,1

+ 0,2

1,3

1,7

1l

2,1

+0,1

+ 0,1

+ 0,1

+ 01

0,2

0,4

0,4

0,4

- 0,1

-0,2

-0,2

-0,2

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Bracketed values should be avoided as far as possible. ¥~!,E1~~: St 60 (steel having a tensile strength of at least 60 kg/mm2 in the finished condition), alternative materials to be specified in order 1 > Where corresponding dimensions are involved, particularly tor shaft extensions, allocation of the Woodruff key cross-sections appropriate to the shaft diameters concerned must be observed. Allocation I applies in all cases where the Woodruff key is used in the role of a feather key, i.e, to transmit the whole of the torque. Allocation II applies in all cases where the Woodruff key is used solely for locating the driving element, other elements, e.g. cotters or tapers being employed to transmit the torque. · 2 ) The listed permissible variations for keyway widths are intended for guidance only. It is recommended that for the widths of broached keyways ISA Class IT 8 be observed instead of IT 9 (similarly P8 3 instead of P9 1 N8 instead of 119 and J8 instead of J9) • . ) In workshop drawings the dimensions t 1 and (dl- t1)• also tz and (d1 + t2) may appear side by side; however, in many cases the dimensions t1 and d1 + t2) will suffice. In this connection it may be It necessary to allow for permissible variations and machining allowances on the shaft and hub bore. ) Preference should be given to Series A (deep hub keyway); this conforms to DIN 688.5 Sheet 1 (t 2 with back clearance), 5 > Series B (shallow hub keyway) for machine tools; this conforms to DIN 688.5 Sheet 2. 6) When the relationship between the Woodruff key and the shaft diameter is based on Allocation II it is permissible to use tolerance zone D 10 also. ·