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Home / Products / Other Fastneners / Pins / DIN 6885-1 (A):2021 Type A Round End Parallel Key

DIN 6885-1 (A):2021 Type A Round End Parallel Key

DIN 6885-1 (A):2021 Type A Round End Parallel Key adopts a Type A round-end parallel key structure to meet the needs of transmitting torque between a shaft and hub while maintaining angular location.

The round ends ease fitting into the keyway and reduce end stress concentration, while the side faces of the key carry drive load in standard shaft connections. Its advantages lie in a clear installation method, well-defined load path, and good adaptability across different materials and installation spaces.

This product is suitable for motor shafts, gears, pulleys, couplings, reducers, and transmission devices. Width, height, length, material, and heat treatment can be adjusted for the final application, balancing cost control, corrosion protection, and assembly consistency.

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PREV：DIN 1469:2011 Grooved Pin NEXT：ASME/ANSI B18.25.3M:1998 Metric Parallel Key

Dimensions unit: inch 

Basic size b

2

3

4

5

6

8

10

12

14

16

18

20

22

h

2

3

4

5

6

7

8

8

9

10

11

12

14

d1

Min.

6

8

10

12

17

22

30

38

44

50

58

65

75

Max.

8

10

12

17

22

30

38

44

50

58

65

75

85

b

Shaft groove 

Nominal(P9/N9)

2

3

4

5

6

8

10

12

14

16

18

20

22

(P9)

Min.

1.969

2.969

3.958

4.958

5.958

7.949

9.949

11.939

13.939

15.939

17.939

19.926

21.926

Max.

1.994

2.994

3.988

4.988

5.988

7.985

9.985

11.982

13.982

15.982

17.982

19.978

21.978

(N9)

Min.

1.971

2.971

3.97

4.97

5.97

7.964

9.964

11.957

13.957

15.957

17.957

19.948

21.948

Max.

1.996

2.996

4

5

6

8

10

12

14

16

18

20

22

t1

Shaft groove 

Min.=Nominal

1.2

1.8

2.5

3

3.5

4

5

5

5.5

6

7

7.5

9

Max.

1.3

1.9

2.6

3.1

3.6

4.2

5.2

5.2

5.7

6.2

7.2

7.7

9.2

b1

Hub groove

Nominal(P9/JS9)

2

3

4

5

6

8

10

12

14

16

18

20

22

(P9)

Min.

1.969

2.969

3.958

4.958

5.958

7.949

9.949

11.939

13.939

15.939

17.939

19.926

21.926

Max.

1.994

2.994

3.988

4.988

5.988

7.985

9.985

11.982

13.982

15.982

17.982

19.978

21.978

(JS9)

Min.

1.9875

2.9875

3.985

4.985

5.985

7.982

9.982

11.9785

13.9785

15.9785

17.9785

19.974

21.974

Max.

2.0125

3.0125

4.015

5.015

6.015

8.018

10.018

12.0215

14.0215

16.0215

18.0215

20.026

22.026

t2

Hub groove (loose)

Min.=Nominal

1

1.4

1.8

2.3

2.8

3.3

3.3

3.3

3.8

4.3

4.4

4.9

5.4

Max.

1.1

1.5

1.9

2.4

2.9

3.5

3.5

3.5

4

4.5

4.6

5.1

5.6

Hub groove (Tight) 

Min.=Nominal

0.5

0.9

1.2

1.7

2.2

2.4

2.4

2.4

2.9

3.4

3.4

3.9

4.4

Max.

0.6

1

1.3

1.8

2.3

2.6

2.6

2.6

3.1

3.6

3.6

4.1

4.6

d2

Min.

d1 + 2.5

d1 + 3.5

d1 + 4

d1 + 5

d1 + 6

d1 + 8

d1 + 8

d1 + 8

d1 + 9

d1 + 11

d1 + 11

d1 + 12

d1 + 14

Thousand pieces of steel weigh ≈kg 

-

-

-

-

-

-

-

-

-

-

-

-

-

 

Basic size b

25

28

32

36

40

45

50

56

63

70

80

90

100

h

14

16

18

20

22

25

28

32

32

36

40

45

50

d1

Min.

85

95

110

130

150

170

200

230

260

290

330

380

440

Max.

95

110

130

150

170

200

230

260

290

330

380

440

500

b

Shaft groove

Nominal(P9/N9)

25

28

32

36

40

45

50

56

63

70

80

90

100

(P9)

Min.

24.926

27.926

31.912

35.912

39.912

44.912

49.912

55.894

62.894

69.894

79.894

89.876

99.876

Max.

24.978

27.978

31.974

35.974

39.974

44.974

49.974

55.968

62.968

69.968

79.968

89.963

99.963

(N9)

Min.

24.948

27.948

31.938

35.938

39.938

44.938

49.938

55.926

62.926

69.926

79.926

89.913

99.913

Max.

25

28

32

36

40

45

50

56

63

70

80

90

100

t1

Shaft groove

Min.=Nominal

9

10

11

12

13

15

17

20

20

22

25

28

31

Max.

9.2

10.2

11.2

12.3

13.3

15.3

17.3

20.3

20.3

22.3

25.3

28.3

31.3

b1

Hub groove

Nominal(P9/JS9)

25

28

32

36

40

45

50

56

63

70

80

90

100

(P9)

Min.

24.926

27.926

31.912

35.912

39.912

44.912

49.912

55.894

62.894

69.894

79.894

89.876

99.876

Max.

24.978

27.978

31.974

35.974

39.974

44.974

49.974

55.968

62.968

69.968

79.968

89.963

99.963

(JS9)

Min.

24.974

27.974

31.969

35.969

39.969

44.969

49.969

55.963

62.963

69.963

79.963

89.9565

99.9565

Max.

25.026

28.026

32.031

36.031

40.031

45.031

50.031

56.037

63.037

70.037

80.037

90.0435

100.0435

t2

Hub groove (loose) 

Min.=Nominal

5.4

6.4

7.4

8.4

9.4

10.4

11.4

12.4

12.4

14.4

15.4

17.4

19.5

Max.

5.6

6.6

7.6

8.7

9.7

10.7

11.7

12.7

12.7

14.7

15.7

17.7

19.8

Hub groove (Tight) 

Min.=Nominal

4.4

5.4

6.4

7.1

8.1

9.1

10.1

11.1

11.1

13.1

14.1

16.1

18.1

Max.

4.6

5.6

6.6

7.4

8.4

9.4

10.4

11.4

11.4

13.4

14.4

16.4

18.4

d2

Min.

d1 + 14

d1 + 16

d1 + 18

d1 + 21

d1 + 23

d1 + 26

d1 + 28

d1 + 32

d1 + 32

d1 + 36

d1 + 40

d1 + 45

d1 + 50

Thousand pieces of steel weigh ≈kg 

-

-

-

-

-

-

-

-

-

-

-

-

-

 

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