z Standards Tmp Din 6885-1

Die Originalfassung der Norm enthält Elemente, z.B. farbige Abbildungen oder Tabellen, die in dieser gescannten Form der Norm nicht originalgetreu darstellbar sind. Dies muß bei der Anwendung berücksichtigt werden. Maßgebend für das Anwenden jeder DIN-Norm ist deren Originalfassung mit dem neuesten Ausgabedatum. Vergewissern Sie sich bitte in den DIN-Mitteilungen, im aktuellen DIN-Katalog mit dem neuesten Ergänzungsheft oder in der aktuellen Ausgabe der PERINORM.

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Anwenderinformation

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?or c o n n e c t i o n with m n

IBO R e c o n e n d a t i o n in course of p r e p a r a t i o n , see Explanations. Type

-ihr

B square-ended1)2)

_.

I ?or Hole for retaining screw

" m e C round-ended

!&ve D square-ended size 8x7 and upwards with hole for I retaining 8 C r e W above the stepped line

s h a f t diaieter d,

Counterbore seationK-L according t o

4 r.í&üïi8

!&ve E round-ended with hole8 for 2 reta-

rcrewe3)

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below the etepped line Hole for jaclring screw sizes 8x7 and 10x8 size 12x8 and upward8 additionally provided with üöûtiûn M-N tapped hole for I o r 2 jacking ecrews M

cnamrer o r - r a a i u s r, h d i u s i n g o f keyway bottom p.

1 T 'i[;!T

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with holes f o r 2 retaining screws3) -F equare-endeb below the stepped line si.ces

8x7 and 10x8

size 12x8 and upwards additionally provided with tapped hole for 1 o r 2 jacking screw

HO10 for spring dowel sleeve s e o t i o i i o-p

- 1

e G aquare-ended with chamfer and hole for 1 retaining screw

-

f o r shafts

2 retaining screw8

1

m

e

Types of kegwag

e E square-ended with

IpsD chamfer and holes for

.

---

g

9 1 e

400 e uc

hole for 1 epring dowel sleeve

I

--a.

-

B o l e s for

Boles j Pudlt

N3 ñaâîusing of keyway ôottbm for ehft and hub

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Designation of aparn.ìle1 key m e A of width b 12 m, height h Parallel key A 12 x 8 x 56 D I N 6885 length 1 56 am:

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or

screws, jacking screws and

1

Sharp edgee removed (all mud) Chamfer Radiuring (at mBp1Ifacturer'e choice)

on

N2

J square-ended with chamfer and

P

4

180

N1

-

8 mm and

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%i553

Bor material and

':

UDC 621.886.6

DEUTSCHE NORMEN

August 1968

,

I

Drive m e Fastenings without Taper Action

6885

Parallel Keys KeywaJs Deep Pattern

Pei)

1

Ilitnehmerverbindungen ohne Anzug; PeBfedern, Nuten, hohe Form Dimensions i n mm

+ 0.3 3 6 1 0 4 5 5 0 5 6 6 3 1 0 8.4 I 9,4 I 10.4 111.4 119.4 I 12,4 114.4 ?11,l I 13.1 1.1 I 8.1 I 9.1 I10.1 ] 11a,ln-c

.

I

1 n7

1#6 19

Bo

I I

I

15,4 14.1

90

100

I 17,4 1 19,5 I 16.1 1 18.1

2,5 9

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-03

IO

-0,5

p,,, e uc

on or TJ

Holes for c

parallel

8

key

Alleinverkauf der Normen durch Beuth Verlag GmbH, Berlin JO und Köln 1

DIN 6885 B 1 . l engl. Preisgr. Verti.-Ni. Oll

01.94

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Page 2

DIE 6885 Part I

@iegigi_: f o r parallel key heights h up t o 25 mm: St 50-IKaccording t o DIN 1652

f o r parallel key heights h over 25 mm: St 60-2Kaccording t o D I N 1652; other grades of s t e e l , e.g. quality s t e e l s and high-grade s t e e l s , are eubject t o special agreement.

'1 I f p a r a l l e l k e y s o f Typce

A and B a r e t o be p r o v i d e d w i t h h o l e s f o r j a c k i n g s c r e w i (91, t h i s i h a l l be s p e c i a l l y i n d i c a t e d when o r d e r i n g . In t h i s c a s e t h e - d e s i g n a t i o n r e a d s , f o r example: P a r a l l e l key AS 1 2 X 8 !B 56 D I N 6885

2, Types A and B c a n a l s o be combined w i t h one end round and t h e o t h e r s q u a r e . In t h i s c a s e t h e d e s i g n a t i o n r e a d s , f o r example: P a r a l l e l key AB 1 2 x 8 x 5 6 D I N

6885

'1 I f parallel k e y s o f Types 1 and F from t h e 1 2 x 8 size upwards a r e r e q u i r e d t o be s u p p l i e d minus h o l e s f o r j a c k i n g s c r e w s ( O S ) t h i s must be s p e c i a l l y s t a t e d when o r d e r i n g . In t h i s c a s e t h e d e s i g n a t i o n r e a d s , f o r example: P a r t I l l e l key POS 1 2 ~ 8 x 5 6D I N 6885 4, Where mating d i m e n s i o n s a r e c o n c e r n e d , and p a r t i c u l a r l y t h o a e o f p a r a l l e l s h a f t e n d s , t h e c o r r e l a t i o n o f p a r a l l e l key c r o s s - s e c t i o n s t o s h a f t nominal d i a m e t e r s must be o b s e r v e d w i t h o u t f a i l . The c o r r e l a t i o n o f p a r a l l e l key c r o s s - s e c t i o n s t o coned s h a f t e n d s and t h e d i m e n s i o n s f o r t h e keyway d e p t h a r e t o be t a k e n from t h e s t a n d a r d s d e a l i n g w i t h coned s h a f t ends.

5 , The i n d i c a t e d t o l e r a n c e z o n e s f o r keyway w i d t h s h o l d good a s t h e normal c a s e f o r m i l l e d keyways. Other t o l e r a n c e z o n e s must be i n d i c a t e d s p e c i a l l y . For w i d t h s of broached keyways, I S A c l a s s I T 8 i s recommended i n s t e a d o f I T g ( t h a t is t o s a y Pö i n s t e a d o f P9, Ntl i n s t e a d of N9 and JS8 i n s t e a d of JS9). For s l i d i n g f i t s , t o l e r a n c e zone A 9 is recommended f o r t h e s h a f t keyway and D1D for t h e hub keyway.

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6, I n workshop drawings t h e dimensions t, and ( d l t , ) as w e l l a s t;, and ( d l + t 2 ) c a n be shown s i d e by s i d e . In many c a s e s , however, t h e d i m e n s i o n s tl and ( d l + t 2 ) are s u f f i c i e n t . A t t h e same time, t h e p e r m i s s i b l e v a r i a t i o n a and machining a l l o w a n c e s on t h e s h a f t and hub b o r e a r e t o be t a k e n l n t o account as a p p r o p r i a t e .

7, The hub keyway d e p t h w i t h o v e r s i z e is i n t e n d e d f o r s p e c i a l c a s e s . in which t h e p a r d l e l key is made t o f i t i n a f i n i s h i n g operation. ')

The v a l u e s f o r d2 c o r r e s p o n d t o t h e s m a l l e s t d i a m e t e r o f p a r t s which c a n be pushed o v e r t h e p a r a l l e l key concentrically.

9, Lengths o v e r 400 and i n t e r m e d i a t e l e n g t h s ( t o be a v o i d e d where p o s s i b l e ) a r e t o be chosen a c c o r d i n g t o D I N 3. In b o r d e r l i n e c a s e s i n t e r m e d i a t e l e n g t h s a r e 6UbJeCt t o t h e p e r m i s s i b l e v a r i a t i o n f o r t h e next B r e a t e r l e n g t h L.

'4

The weight d a t a do not t a k e account of h o l e s f o r r e t a i n i n g ôcrews. j a c k i n g s c r e w s and s p r i n g dowel sleeves. Explanations

The c o n t e n t o f t h i s S t a n d a r d a g r e e s e s s e n t i a l l y w i t h t h e c o n c l u s i o n s of T e c h n i c a l Committee ISO/TC16 "Keys" on which t h e f o l l o w i n g IC0 d r a f t is based: D r a f t IS0 Recommendation No 1084 R e c t a n g u l a r or s q u a r e p a r a l l e l k e y s a n d t h e i r c o r r e s p o n d i n g keyways C l a v e t a g e p a r c l a v e t t e s p a r a l l è l e s c a r r é s ou r e c t a n g u l a i r e s Panfedern The f o l l o w i n g amendments and a d d i t i o n s s h o u l d be noted compared w i t h t h e F e b r u a r y 1956 issue o f DIN 6885 P a r t 1: a ) Some o f t h e keyway d e p t h s in s h a f t and hub have been a l t e r e d . As a r e s u l t o f t h i s , however, t h e i n t e r c h a n g e a b i l i t y of t h e p a r a l l e l k e y s is e i t h e r n o t j e o p a r d i z e d a t a l l , o r is o n l y a t r i s k i n a few borderl i n e c a s e s which a r e u n l i k e l y t o a r i s e in p r a c t i c e . The Table below compares t h e keyway d e p t h s p r e v i o u s l y s p e c i f i e d w i t h t h e new ones. T h i s comparison shows t h e b o r d e r l i n e c a s e s i n which o v e r s i z e i s p o s s i b l e i f t h e p a r t s b e i n g mated a r e u n f a v o u r a b l y d i s p o s e d i n t h e t o l e r a n c e bands. T h i s a p p l i e s o n l y t o p a r a l l e l k e y s w i t h back c l e a r a n c e . b ) The v a l u e s f o r c h a m f e r i n g and r a d i u s i n g t h e k e y s and f o r r a d i u s i n g t h e keyway bottom have been a l t e r e d i n some c a e e s , b u t t h i s h a s n o t a d v e r s e l y a f f e c t e d i n t e r c h a n g e a b i l i t y . e ) As f a r as Types A and B a r e c o n c e r n e d , f o o t n o t e s 1 and 2 s t a t e t h a t t h e s e c a n a l s o be s u p p l i e d with h o l e s f o r j a c k i n g s c r e w s or w i t h b o t h t y p e s of end combined i n t h e same key. A p p r o p r i a t e examples o f d e 8 i g : i a t i o n s a r e i n c l u d e d . R e f e r e n c e h a s a l s o been made t o t h e f a c t t h a t t h e p o s i t i o n and number o f h o l e s must be a g r e e d where a p p l i c a b l e . d ) In c o n t r a s t w i t h the p r e v i o u s p r o v i s i o n s , t h e h o l e f o r t h e j a c k i n g screw in t h e c a s e of Types E and F h a s been moved from t h e mid-point of t h e k e y l e n g t h t o a p o s i t i o n n e a r e r one end o f t h e key. T h i s ones i d e d p o s i t i o n o f t h e key is i n t e n d e d t o make i t e a s i e r t o l i f t . e ) The p r e v i o u a l y s t a n d a r d i z e d p a r a l l e l c o u n t e r b o r e i n t h e t a p p e d h o l e t o t a k e t h e j a c k i n g screw h a s been r e p l a c e d by a c o n i c a l c o u n t e r s i n k ( S e c t i o n M-N). f ) ISO/TC16 doca n o t s p e c i f y keyway d e p t h s w i t h o v e r s i z e . The p r e v i o u s l y s p e c i f i e d hub keyway d e p t h s w i t h o v e r s i z e have been r e - c a l c u l a t e d on t h e b a s i s of t h e s h a f t keyway d e p t h s m o d i f i e d a c c o r d i n g t o t h e IS0 p r o p o s a l e o t h a t t h e o v e r s i z e 8 n e c e s s a r y f o r f i n a l f i t t i n g a r e r e s t o r e d . They c o r r e s p o n d t o t h o s e f o r k e y s a c c o r < ' i n g t o DIN 6886 (IS0 d r a f t No. 1085). g) The 59 t o l e r a n c e zone f o r hub keyway w i d t h s h a s been changed t o JS9. S i n c e t h e s p e c i f i e d t o l e r a n c e s are almo r e c o g n i z e d i n t e r n a t i o n a l l y t h e y now count under t h e c o v e r a g e o f t h i s S t a n d a r d ( F o o t n o t e 5 ) ae t h e normal t y p e l and n o t sa p r e v i o u s l y as a g u i d e l i n e . T o l e r a n c e s d i f f e r i n g from them must be specially indicated. h ) The p r e v i o u s l e n g t h s 315 and 355 mm have b e e n r e p l a c e d b y l e n g t h s 320 and 360 mm. i) The w e i g h t s o f t h e k e y s have been checked and c o r r e c t e d t o t h e e x t e n t t h a t t h i s was n e c e s s a r y , 0.8. owing t o t h e new l e n g t h s 320 And 360 mm. The Weight d e d u c t i o n f o r Type A h a s been c o r r e c t e d f o r c e r t a i n e i z e s .

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DIN 6885 Part I h g 0 3 k ) The c o u n t e r b o r e s f o r r e t a i n i n g s c r e w s have been chosen a c c o r d i n g t o t h e "medium" r a n g e o f D I N 74 P a r t 2 because t h e p r e v i o u s " c l o s e " r a n g e was o f t e n not s u f f i c i e n t owing t o t h e c l o s e f i t in t h e t h r o u g h h o l e t o compensate f o r t h e t o l e r a n c i n g o f t h e c e n t r e d i s t a n c e s when two r e t a i n i n g s c r e w s a r e used. In t h e f u t u r e , cheese-head s c r e w s a c c o r d i n g t o D I U 8 4 , D I N 6912 and D I N 7984 a r e t o hhve s t a n d a r d head d i a m e t e r s and t h e y a r e t h e r e f o r e o p t i o n a l a l t e r n a t i r d s a s r e t a i n i n g screws. 1) The depth o f t a p p e d holes in t h e s h a f t and t h e l e n g t h s o f t h e r e t a i n i n g s c r e w s have been so s p e c i f i e d t h a t t h e l e n g t h o f i n s e r t i o n is a b o u t l x t h r e a d d i a m e t e r . a ) The c o r r e l a t i o n of s p r i n g dowel s l e e v e s h a s been changed i n some cases and d i a m e t e r 13 r e p l a c e d by 12. The hole d i m e n s i o n s have been so s p e c i f i e d t h a t t h e dowel s l e e v e h a s l x dowel d i a m e t e r p r o j e c t i n g e q u a l l y i n t o t h e key and t h e s h a f t . n) For t h e v a r i o u s keyway forms o c c u r r i n g i n p r a c t i c e i t h a s been d e c i d e d t o adopt symbols so t h a t t h e s e forms c a n be d e s i g n a t e d on t h e b a s i s of t h e s t a n d a r d where n e c e s s a r y . Types Ni and N2 r e p r e s e n t t h e c o n v e n t i o n a l forms of keyway. Type N3 a r i s e s when the keyway i a made by a keyway c u t t e r h a v i n g a d i a m e t e r smaller t h a n t h e keyway width s u c h a s is w i d e l y used on s p e c i a l keyway milling machines. o ) The material d a t a have been t a k e n o v e r from t h e new i s s u e o f D I N 6880.

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