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Flexible Couplings - Bellows type, zero backlash, BKL series. (Part Numbers)

R+W

Features
Easy to mount
Light weight and low moment of inertia
High torsional stiffness

Design
Two clamping hubs concentrically mounted to flexible bellows. Brief overloads of up to 1.5x the rated torque are acceptable.

Material
Bellows: high grade stainless steel
Hubs: see table

Advantage
Smooth stable running in highly dynamic and highly precise motion applications

Part Number

Configured Part Number is shown.

Product Specifications
Part Numbers

: 30; 60; 90

Part Number
BKL/150/28/35
BKL/150/28/36
BKL/150/28/37
BKL/150/28/38
BKL/150/28/39
BKL/150/28/40
BKL/150/28/41
BKL/150/28/42
BKL/150/29/29
BKL/150/29/30
BKL/150/29/31
BKL/150/29/32
BKL/150/29/33
BKL/150/29/34
BKL/150/29/35
BKL/150/30/30
BKL/150/30/31
BKL/150/30/32
BKL/150/30/33
BKL/150/30/34
BKL/150/30/35
BKL/150/30/36
BKL/150/30/37
BKL/150/30/38
BKL/150/30/39
BKL/150/30/40
BKL/150/30/41
BKL/150/30/42
BKL/150/31/31
BKL/150/31/32
BKL/150/31/33
BKL/150/31/34
BKL/150/31/35
BKL/150/32/32
BKL/150/32/33
BKL/150/32/34
BKL/150/32/35
BKL/150/32/36
BKL/150/32/37
BKL/150/32/38
BKL/150/32/39
BKL/150/32/40
BKL/150/32/41
BKL/150/32/42
BKL/150/33/33
BKL/150/33/34
BKL/150/33/35
BKL/150/33/36
BKL/150/33/37
BKL/150/33/38
BKL/150/33/39
BKL/150/33/40
BKL/150/33/41
BKL/150/33/42
BKL/150/34/34
BKL/150/34/35
BKL/150/34/36
BKL/150/34/37
BKL/150/34/38
BKL/150/34/39
BKL/150/34/40
BKL/150/34/41
BKL/150/34/42
BKL/150/35/35
BKL/150/35/36
BKL/150/35/37
BKL/150/35/38
BKL/150/35/39
BKL/150/35/40
BKL/150/35/41
BKL/150/35/42
BKL/150/36/36
BKL/150/36/37
BKL/150/36/38
BKL/150/36/39
BKL/150/36/40
BKL/150/36/41
BKL/150/36/42
BKL/150/37/37
BKL/150/37/38
BKL/150/37/39
BKL/150/37/40
BKL/150/37/41
BKL/150/37/42
BKL/150/38/38
BKL/150/38/39
BKL/150/38/40
BKL/150/38/41
BKL/150/38/42
BKL/150/39/39

Minimum order quantity	Days to Ship	Allowable Torque Range (N•m)	For Shaft Size D1 (mm)	For Shaft Size D2 (mm)	Outer Dia. A (Ø)	Overall Length W (mm)	Feature	Allowable Torque (N•m)	Moment of Inertia (kg･m²)	Fit Length (mm) (mm)	Torsional Stiffness (N-m/rad) (N-m/rad)	Tightening Torque of the Fastening Screw (N-m) (N-m)	Size
1 Piece(s)	21 Days	100~less than 500	28	35	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	28	36	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	28	37	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	28	38	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	28	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	28	40	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	28	41	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	28	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	29	29	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	29	30	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	29	31	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	29	32	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	29	33	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	29	34	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	29	35	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	30	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	31	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	32	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	33	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	34	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	35	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	36	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	37	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	38	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	40	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	41	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	30	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	31	31	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	31	32	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	31	33	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	31	34	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	31	35	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	32	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	33	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	34	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	35	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	36	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	37	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	38	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	40	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	41	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	32	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	33	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	34	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	35	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	36	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	37	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	38	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	40	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	41	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	33	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	34	34	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	34	35	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	34	36	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	34	37	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	34	38	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	34	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	34	40	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	34	41	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	34	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	35	35	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	35	36	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	35	37	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	35	38	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	35	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	35	40	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	35	41	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	35	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	36	36	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	36	37	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	36	38	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	36	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	36	40	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	36	41	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	36	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	37	37	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	37	38	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	37	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	37	40	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	37	41	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	37	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	38	38	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	38	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	38	40	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	38	41	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	38	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	39	39	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150

Basic Information

Type	Bellows Type	Max. Rotational Speed Range(r/min)	4001~10000	Body Material	Aluminum
Max. Rotational Speed(r/min)	10000	Allowable Angular Misalignment(deg)	1	Allowable Lateral Misalignment Range(mm)	0.02~0.2
Allowable Lateral Misalignment(mm)	0.2	Operating Temperature Range(℃)	-12::212

Configure

1,306 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

For Shaft Size D1(mm)
0-Pilot Bore

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62
Clear
For Shaft Size D2(mm)
0-Pilot Bore

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62
Clear
Outer Dia. A(Ø)
25

32

40

49

56

66

82

110

123
Clear
Overall Length W(mm)
30

40

44

58

68

79

92

109

114
Clear
Feature
No Backlash

Low Moment of Inertia

Unfinished Shaft Bore
Clear
Allowable Torque(N•m)
2

4.5

10

15

30

60

80

150

300

500
Clear
Fit Length (mm)(mm)
10.5

13

21.5

26

28

32.5

41

42.5
Clear
Torsional Stiffness (N-m/rad)(N-m/rad)
1.5

7

9

23

31

72

80

141

157

290
Clear
Tightening Torque of the Fastening Screw (N-m)(N-m)
2.3

4

4.5

8

15

40

70

85

120

200
Clear
Size
2

4.5

10

15

30

60

80

150

300

500
Clear
Allowable Torque Range(N•m)
10.01~20.00

20.01~50.00

50.01~100.00

100~less than 500
Clear
CAD
- 3D
Clear

Days to Ship

All

5 Days or Less

21 Days or Less

66 Days or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

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Flexible Couplings - Bellows type, zero backlash, BKL series. (Part Numbers)

Basic Information

Configure

Specification/Dimensions

For Shaft Size D1(mm)

For Shaft Size D2(mm)

Outer Dia. A(Ø)

Overall Length W(mm)

Feature

Allowable Torque(N•m)

Fit Length (mm)(mm)

Torsional Stiffness (N-m/rad)(N-m/rad)

Tightening Torque of the Fastening Screw (N-m)(N-m)

Size

Allowable Torque Range(N•m)

CAD