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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/150/39/40
BKL/150/39/41
BKL/150/39/42
BKL/150/40/40
BKL/150/40/41
BKL/150/40/42
BKL/150/41/41
BKL/150/41/42
BKL/150/42/42
BKL/150/MPB/MPB
BKL/300/24/24
BKL/300/24/25
BKL/300/24/26
BKL/300/24/27
BKL/300/24/28
BKL/300/24/29
BKL/300/24/30
BKL/300/24/31
BKL/300/24/32
BKL/300/24/33
BKL/300/24/34
BKL/300/24/35
BKL/300/24/36
BKL/300/24/37
BKL/300/24/38
BKL/300/24/39
BKL/300/24/40
BKL/300/24/41
BKL/300/24/42
BKL/300/24/43
BKL/300/24/44
BKL/300/24/45
BKL/300/24/46
BKL/300/24/47
BKL/300/24/48
BKL/300/24/49
BKL/300/24/50
BKL/300/24/51
BKL/300/24/52
BKL/300/24/53
BKL/300/24/54
BKL/300/24/55
BKL/300/24/56
BKL/300/24/57
BKL/300/24/58
BKL/300/24/59
BKL/300/24/60
BKL/300/25/25
BKL/300/25/26
BKL/300/25/27
BKL/300/25/28
BKL/300/25/29
BKL/300/25/30
BKL/300/25/31
BKL/300/25/32
BKL/300/25/33
BKL/300/25/34
BKL/300/25/35
BKL/300/25/36
BKL/300/25/37
BKL/300/25/38
BKL/300/25/39
BKL/300/25/40
BKL/300/25/41
BKL/300/25/42
BKL/300/25/43
BKL/300/25/44
BKL/300/25/45
BKL/300/25/46
BKL/300/25/47
BKL/300/25/48
BKL/300/25/49
BKL/300/25/50
BKL/300/25/51
BKL/300/25/52
BKL/300/25/53
BKL/300/25/54
BKL/300/25/55
BKL/300/25/56
BKL/300/25/57
BKL/300/25/58
BKL/300/25/59
BKL/300/25/60
BKL/300/26/26
BKL/300/26/27
BKL/300/26/28
BKL/300/26/29
BKL/300/26/30
BKL/300/26/31
BKL/300/26/32

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	39	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	39	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	39	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	40	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	40	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	40	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	41	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	41	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	42	42	82	92	No Backlash / Low Moment of Inertia	150	0.94	32.5	141	85	150
1 Piece(s)	5 Days	100~less than 500	0-Pilot Bore	0-Pilot Bore	82	92	No Backlash / Low Moment of Inertia / Unfinished Shaft Bore	150	0.94	32.5	141	85	150
1 Piece(s)	21 Days	100~less than 500	24	24	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	25	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	26	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	27	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	28	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	29	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	30	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	31	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	32	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	33	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	34	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	35	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	36	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	37	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	38	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	39	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	40	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	41	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	42	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	43	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	44	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	45	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	46	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	47	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	48	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	49	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	50	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	51	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	52	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	53	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	54	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	55	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	56	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	57	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	58	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	59	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	24	60	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	25	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	26	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	27	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	28	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	29	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	30	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	31	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	32	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	33	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	34	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	35	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	36	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	37	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	38	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	39	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	40	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	41	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	42	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	43	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	44	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	45	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	46	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	47	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	48	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	49	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	50	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	51	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	52	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	53	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	54	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	55	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	56	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	57	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	58	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	59	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	25	60	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	26	26	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	26	27	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	26	28	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	26	29	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	26	30	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	26	31	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300
1 Piece(s)	21 Days	100~less than 500	26	32	110	109	No Backlash / Low Moment of Inertia	300	5.3	41	157	120	300

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