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

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	26	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	26	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	26	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	26	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	26	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	26	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	26	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	26	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	26	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	26	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	29	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	29	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	29	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	29	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	29	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	29	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	29	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	30	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	30	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	30	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	30	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	30	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	30	35	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

2,728 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

Allowable Torque Range(N•m)
10.01~20.00

20.01~50.00

50.01~100.00

100~less than 500
Clear
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
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
Feature
No Backlash

Low Moment of Inertia

Unfinished Shaft Bore
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

Allowable Torque Range(N•m)

For Shaft Size D1(mm)

For Shaft Size D2(mm)

Outer Dia. A(Ø)

Overall Length W(mm)

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

Feature

CAD