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Flexible Shaft Couplings（Buffer Part Material：Polyurethane）

Type

With Slit
Disc Type
Oldham Type
Jaw Type
Bellows Type
Others

13 items

: 30; 45; 60

Flexible Couplings - zero backlash, EKL series.

R+W

Features
Short overall length
Easy mounting
Vibration damping

Design
Two concentrically machined hubs with curved jaws and clamping screws, with calibrated preloaded insert

Material
Hubs: high strength aluminum
Elastomer: wear resistant thermanally stable TPU, available in 3 hardness levels

Advantage
Smooth running and reliable transmission with absorption of vibration and shock

Size 800 is available on special request.

CAD ：

3D

Days to Ship: 5 Days or more
Flexible Couplings - zero backlash, EK2 series.

R+W

Features
Easy to mount
Highly concentric assembly
Vibration damping

Design
Two concentrically machined hubs with curved jaws and clamping screws, with calibrated preloaded insert

Material
Hubs: high strength aluminum
Elastomer: wear resistant thermanally stable TPU, available in 3 hardness levels

Advantage
Smooth running and reliable transmission with absorption of vibration and shock

Size 800 is available on special request.

CAD ：

3D

Days to Ship: 5 Days or more
Flexible Couplings - Star Flex, ALS-R series.

Miki Pulley

Flexible spider type couplings, model Star flex series ALS-R. It has a polyurethane elastomer used in the coupling separator. It has excellent anti vibration and shock absorption.

Volume Discount

CAD ：

2D
Days to Ship: 8 Days or more
Flexible Couplings - For servomotor.

NBK

Spider type flexible couplings, for servomotor. It has a separator that absorbs vibrations. Zero backlash. Excellent flexibility. 4 types of spacer hardnesses are selected depending on use, torque and misalignment.

Volume Discount

CAD ：

2D / 3D
Days to Ship: 8 Days or more
Flexible Couplings - With clamp type fastening and aluminum body.

MISUMI

Flexible spider type couplings with clamp type fastening. Models are available to select whether a keyway is required at one end or both.

New Pricing

METRIC

inCAD Components

CAD ：

2D / 3D
Days to Ship: 8 Days or more
Flexible Couplings - MJB series.

NBK

Flexible spider spacer type couplings, series MJB. Excellent for high torque transmission. Excellent flexibility. Absorbs torsional vibration as well as eccentricity. It has electrical resistance.

Volume Discount
Days to Ship: 10 Days or more
Flexible Couplings - For high torque and vibration absorption.

MISUMI

Flexible spider couplings for high torque and vibration absorption. Zero backlash transmission is possible with low torque. Excellent flexibility and 4 types of spacer hardness.

New Pricing

METRIC

inCAD Components

CAD ：

2D / 3D
Days to Ship: 8 Days or more
Flexible Couplings - MF series.

Nihon Miniature Coupling

Flexible couplings, MF series. They have a rubber separator and the coupling body material is cast zinc. The fastening method is by means of a clamp at each end. Ideal for conveying components with constant velocity.

Volume Discount

CAD ：

2D
Days to Ship: 8 Days or more
Flexible Couplings - zero backlash, EK2 series, (Inches).

R+W

Features
Easy to mount
Highly concentric assembly
Vibration damping

Design
Two concentrically machined hubs with curved jaws and clamping screws, with calibrated preloaded insert

Material
Hubs: high strength aluminum
Elastomer: wear resistant thermanally stable TPU, available in 3 hardness levels

Advantage
Smooth running and reliable transmission with absorption of vibration and shock

Size 800 is available on special request.

CAD ：

3D

Days to Ship: 5 Days or more
Flexible Couplings - zero backlash, EKL series, (Inches).

R+W

Features
Short overall length
Easy mounting
Vibration damping

Design
Two concentrically machined hubs with curved jaws and clamping screws, with calibrated preloaded insert

Material
Hubs: high strength aluminum
Elastomer: wear resistant thermanally stable TPU, available in 3 hardness levels

Advantage
Smooth running and reliable transmission with absorption of vibration and shock

Size 800 is available on special request.

CAD ：

3D

Days to Ship: 5 Days or more
Flexible Couplings - ALS-Y series.

Miki Pulley

Flexible spider coupling, ALS-Y series. The material is aluminum. It has a polyurethane resin separator. It has a high transmission torque. It can be selected with pilot holes, with clamping or clamping type.

Volume Discount

CAD ：

2D
Days to Ship: 16 Days or more
Flexible Couplings - With high rigidity and choice of fastening type.

MISUMI

Rigidity Type is Servo Motor Compatible

METRIC

inCAD Components

CAD ：

2D / 3D
Days to Ship: 12 Days or more
Flexible Couplings - Oldham type, clamp-on type, serrated spacer.

NBK

Oldham type flexible couplings, clamp-on type. The torque is transmitted through the toothed spacer. It has excellent flexibility.

Volume Discount

CAD ：

2D / 3D
Days to Ship: 8 Days or more

Days to Ship:	5 Days or more

Days to Ship:	5 Days or more

Days to Ship:	8 Days or more

Days to Ship:	8 Days or more

Days to Ship:	8 Days or more

Days to Ship:	10 Days or more

Days to Ship:	8 Days or more

Days to Ship:	8 Days or more

Days to Ship:	5 Days or more

Days to Ship:	5 Days or more

Days to Ship:	16 Days or more

Days to Ship:	12 Days or more

Days to Ship:	8 Days or more


Brand
Product Series
CAD
Days to Ship
Specifications
Type
Allowable Misalignment
Application
Allowable Torque Range(N•m)
For Shaft Size D1(mm)
For Shaft Size D2(mm)
Outer Dia. A(Ø)
Overall Length W(mm)
Max. Rotational Speed Range(r/min)
Feature
Body Material
Category
Allowable Torque(N•m)
Max. Rotational Speed(r/min)
Allowable Angular Misalignment(deg)
Allowable Lateral Misalignment Range(mm)
Allowable Lateral Misalignment(mm)
Buffer Part Material
Disc Part Material
Bellows Part Material
For Shaft Size D1(inch)
For Shaft Size D2(inch)

					New Pricing		New Pricing
Brand	R+W	R+W	Miki Pulley	NBK	MISUMI	NBK	MISUMI	Nihon Miniature Coupling	R+W	R+W	Miki Pulley	MISUMI	NBK
Product Series	Flexible Couplings - zero backlash, EKL series.	Flexible Couplings - zero backlash, EK2 series.	Flexible Couplings - Star Flex, ALS-R series.	Flexible Couplings - For servomotor.	Flexible Couplings - With clamp type fastening and aluminum body.	Flexible Couplings - MJB series.	Flexible Couplings - For high torque and vibration absorption.	Flexible Couplings - MF series.	Flexible Couplings - zero backlash, EK2 series, (Inches).	Flexible Couplings - zero backlash, EKL series, (Inches).	Flexible Couplings - ALS-Y series.	Flexible Couplings - With high rigidity and choice of fastening type.	Flexible Couplings - Oldham type, clamp-on type, serrated spacer.
CAD	3D	3D	2D	2D / 3D	2D / 3D		2D / 3D	2D	3D	3D	2D	2D / 3D	2D / 3D
Days to Ship	5 Days or more	5 Days or more	8 Days or more	8 Days or more	8 Days or more	10 Days or more	8 Days or more	8 Days or more	5 Days or more	5 Days or more	16 Days or more	12 Days or more	8 Days or more
Specifications					METRIC inCAD Components		METRIC inCAD Components					METRIC inCAD Components
Type	Jaw Type	Jaw Type	Jaw Type	Jaw Type	Jaw Type	Jaw Type	Jaw Type	Others	Jaw Type	Jaw Type	Jaw Type	Jaw Type	Oldham Type
Allowable Misalignment	-	-	None / Angular / Eccentricity / Axial	Angular / Eccentricity / Axial	Angular / Eccentricity / Axial	-	Angular / Eccentricity / Axial	Angular / Eccentricity	-	-	None / Angular / Eccentricity / Axial	Angular / Eccentricity / Axial	Angular / Eccentricity
Application	Servo Motor / Stepping Motor	Servo Motor / Stepping Motor	Standard / Servo Motor / Stepping Motor / Encoder	Standard / Servo Motor / Stepping Motor	Standard	Standard / Servo Motor / Stepping Motor	Standard	Standard	Servo Motor / Stepping Motor	Servo Motor / Stepping Motor	Standard / Servo Motor / Stepping Motor / Encoder	Standard	Standard
Allowable Torque Range(N•m)	10.01~20.00 ～ 1000~less than 5000	10.01~20.00 ～ 1000~less than 5000	0.05~1.00 ～ 500~less than 1000	0.05~1.00 ～ 100~less than 500	0.05~1.00 ～ 10.01~20.00	5.01~10.00 ～ 1000~less than 5000	0.05~1.00 ～ 10.01~20.00	0.05~1.00 ～ 3.01~5.00	10.01~20.00 ～ 1000~less than 5000	10.01~20.00 ～ 1000~less than 5000	0.05~1.00 ～ 100~less than 500	10.01~20.00 ～ 50.01~100.00	0.05~1.00 ～ 1.01~3.00
For Shaft Size D1(mm)	3 ～ 60	8 ～ 60	3 ～ 60	3 ～ 45	3 ～ 16	8 ～ 50	3 ～ 16	3 ～ 18	-	-	3 ～ 60	15 ～ 40	3 ～ 15
For Shaft Size D2(mm)	3 ～ 60	8 ～ 60	3 ～ 60	3 ～ 45	3 ～ 16	8 ～ 50	3 ～ 16	3 ～ 18	-	-	3 ～ 60	15 ～ 40	3 ～ 15
Outer Dia. A(Ø)	16 ～ 102	42 ～ 102	14 ～ 105	14 ～ 95	14 ～ 40	40 ～ 95	14 ～ 40	20 ～ 40	42 ～ 102	16 ～ 102	14 ～ 105	55 ～ 95	16 ～ 32
Overall Length W(mm)	20 ～ 94	66 ～ 126	22 ～ 140	22 ～ 126	22 ～ 66	66 ～ 126	22 ～ 66	24 ～ 40	66 ～ 126	20 ～ 94	22 ～ 140	60 ～ 100	27 ～ 48
Max. Rotational Speed Range(r/min)	4001~10000 ～ 10001~78000	4001~10000 ～ 10001~78000	4001~10000 ～ 10001~78000	4001~10000 ～ 10001~78000	10001~78000	4001~10000 ～ 10001~78000	10001~78000	2001~4000	4001~10000 ～ 10001~78000	4001~10000 ～ 10001~78000	4001~10000 ～ 10001~78000	2001~4000 ～ 10001~78000	10001~78000
Feature	No Backlash	No Backlash	High Accuracy ～ Vibration Insulation	High Torque ～ Vibration Insulation	High Torque ～ Low Moment of Inertia	High Torque ～ Vibration Insulation	High Torque ～ Low Moment of Inertia	Small ～ Vibration Insulation	No Backlash	No Backlash	Low Moment of Inertia ～ Vibration Insulation	High Torque ～ Low Moment of Inertia	Vibration Insulation
Body Material	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum	Steel	Aluminum	Alloy	Aluminum	Aluminum	Aluminum	Aluminum	Alloy
Category	-	-	Coupling Main Body	Coupling Main Body	Coupling Main Body	Coupling Main Body	Coupling Main Body	Coupling Main Body	-	-	Coupling Main Body	Coupling Main Body	Coupling Main Body
Allowable Torque(N•m)	1 ～ 1350	12 ～ 1350	0.31 ～ 525	0.7 ～ 450	0.7 ～ 17	9.8 ～ 1120	0.7 ～ 17	0.392 ～ 3.923	12 ～ 1350	1 ～ 1350	0.31 ～ 310	20 ～ 80	0.5 ～ 3
Max. Rotational Speed(r/min)	8000 ～ 15000	8000 ～ 12500	4500 ～ 34100	6000 ～ 45000	15000 ～ 45000	10000 ～ 23000	15000 ～ 45000	3000	8000 ～ 12500	8000 ～ 15000	4500 ～ 34100	4000 ～ 11000	19000 ～ 39000
Allowable Angular Misalignment(deg)	0.8 ～ 1.2	1	1	1	1	1	1	1	0.8 ～ 1.2	0.8 ～ 1.2	1	2	2
Allowable Lateral Misalignment Range(mm)	0.02~0.2 ～ 0.21~0.40	0.02~0.2 ～ 0.21~0.40	0.02~0.2	0.02~0.2	0.02~0.2	0.02~0.2	0.02~0.2	0.02~0.2 ～ 0.21~0.40	0.02~0.2 ～ 0.21~0.40	0.02~0.2 ～ 0.21~0.40	0.02~0.2	0.21~0.40	0.02~0.2
Allowable Lateral Misalignment(mm)	0.06 ～ 0.35	0.15	0.1 ～ 0.15	-	0.1 ～ 0.2	0.08 ～ 0.2	0.1 ～ 0.2	0.15 ～ 0.35	0.08 ～ 0.35	0.06 ～ 0.35	0.1 ～ 0.2	0.3 ～ 0.4	0.2
Buffer Part Material	Polyurethane	Polyurethane	Polyurethane	Polyurethane	Polyurethane	Polyurethane	Polyurethane	Polyurethane	Polyurethane	Polyurethane	Polyurethane	Polyurethane	Polyurethane
Disc Part Material	-	-	-	-	-	-	-	-	-	-	-	-	-
Bellows Part Material	-	-	-	-	-	-	-	-	-	-	-	-	-
For Shaft Size D1(inch)	-	-	-	-	-	-	-	-	1 ～ 7/8	1 ～ 7/8	-	-	-
For Shaft Size D2(inch)	-	-	-	-	-	-	-	-	1 ～ 7/8	1 ～ 7/8	-	-	-

Configure

Specification/Dimensions

Allowable Misalignment
- None
- Angular
- Eccentricity
- Axial
Larger Image

Clear

Application
- Standard
- Servo Motor
- Stepping Motor
- Encoder
Clear

Allowable Torque Range(N•m)
0.05~1.00

1.01~3.00

3.01~5.00

5.01~10.00

10.01~20.00

20.01~50.00

50.01~100.00

100~less than 500

500~less than 1000

1000~less than 5000
Clear

Metric / Inch
- metric
Clear

For Shaft Size D1(mm)
0-Pilot Bore

1

1.5

2

2.5

3

3.17

3.2

4

4.5

4.76

5

6

6.35

7

7.93

8

9

9.5

9.52

9.525

9.53

10

11

12

12.7

13

14

15

15.875

16

17

18

19

20

20.5

21

22

23

24

25

25.4

26

27

28

29

30

30.5

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
Drawing

Clear

For Shaft Size D2(mm)
0-Pilot Bore

1

1.5

2

2.4

2.5

3

3.17

3.2

4

4.5

4.76

5

6

6.35

7

7.93

8

9

9.5

9.52

9.525

9.53

10

11

12

12.7

13

14

15

15.875

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
Drawing

Clear

Outer Dia. A(Ø)
6

6.4

8

9

9.5

10

12

12.7

13

13.5

14

14.5

15

16

16.1

16.6

16.8

17

18

19

19.1

20

21

22

24

25

25.4

26

27

27.3

28

29

30

31.7

32

33.3

34

34.4

35

36

38

39

40

41.3

42

44

44.5

45

46

48

49

50

53.6

54

54.5

55

56

57

58

60

63

64

65

66

66.5

67

68

70

75

79

80

81

82

85

87

88

90

94

95

100

102

104

105

110

118

123

125

126

144

155
Drawing

Clear

Overall Length W(mm)
5.1

7.3

8.4

9

9.4

9.6

10

10.2

10.5

11.2

11.8

12.4

12.7

13.5

14

14.2

14.6

14.9

15

15.5

15.7

15.8

15.9

16

16.2

16.5

16.6

16.7

17.4

17.8

18

18.1

18.4

18.5

18.8

19

19.35

19.4

19.8

20

20.2

20.4

20.5

21

21.2

21.4

21.5

21.6

22

22.1

22.5

23

23.1

23.15

23.2

23.3

23.4

23.5

23.6

24

24.4

24.5

25

25.5

25.6

25.7

25.9

26

26.2

26.5

26.6

27

27.2

27.3

27.4

28

28.2

28.4

29

29.8

30

30.2

30.4

31

31.2

31.6

32

32.2

32.3

32.5

32.7

32.8

33

33.3

33.8

34

34.4

35

36

36.5

36.8

37.2

37.4

37.8

38

38.2

38.6

39

39.2

39.4

39.5

40

40.5

41

41.8

42

43.2

43.4

43.6

44

44.7

44.8

45

45.2

46

46.6

47

47.6

48

48.4

49.2

49.4

50

50.2

50.6

50.8

51

51.2

52

53

53.4

53.6

54

54.1

54.4

54.5

54.6

55

55.5

56

56.5

56.6

57

58

58.2

58.6

59

59.7

59.8

60

60.4

61

61.2

62

63.4

63.6

63.8

64.8

65

65.6

66

66.6

67

67.5

68

68.3

68.6

68.7

68.8

69

69.6

69.8

70

70.5

70.6

71

71.2

72

73

73.3

74

74.4

74.8

75

75.6

77

77.6

77.8

78

78.8

79

79.5

79.8

80

80.8

81

82

83

83.6

84

84.7

85.5

85.6

86

88

89.3

89.6

90

90.8

91

92

93

93.6

94

95

95.6

96

97

97.2

98

98.6

99

99.6

100

101.6

102

104.4

105.8

106

107

107.6

109

110

112.8

113

114

115.6

119.6

120

120.8

123.6

125

126

127

129.6

130

137.6

140

143

144

150

150.6

154

154.6

160

170.6
Drawing

Clear

Max. Rotational Speed Range(r/min)
1001~2000

2001~4000

4001~10000

10001~78000

78001~
Clear

Feature
Clean Environment

Heat Resistant

High Accuracy

High Durability

High Torque

High Torsional Rigidity

Low Moment of Inertia

No Backlash

Small

Unfinished Shaft Bore

Vacuum Environment

Vibration Insulation
Clear

Body Material
Alloy

Aluminum

Resin

Stainless Steel

Steel
Clear

Category
- Coupling Main Body
- Maintenace Parts
Clear

Allowable Torque(N•m)
0.05

0.06

0.08

0.1

0.12

0.147

0.15

0.196

0.2

0.21

0.25

0.3

0.31

0.343

0.35

0.39

0.392

0.4

0.42

0.5

0.54

0.59

0.6

0.65

0.7

0.7845

0.8

0.84

0.9

0.99

1

1.1

1.19

1.2

1.275

1.3

1.39

1.4

1.5

1.6

1.7

1.79

1.8

1.961

1.99

2

2.1

2.19

2.2

2.3

2.4

2.452

2.5

2.59

2.6

2.79

2.8

2.99

3

3.2

3.3

3.4

3.432

3.5

3.6

3.79

3.8

3.923

3.99

4

4.2

4.4

4.5

4.6

4.7

4.8

4.89

4.9

5

5.4

5.5

5.6

6

6.3

6.4

6.6

6.8

6.865

7

7.4

7.49

7.5

8

8.4

8.99

9

9.6

9.8

9.807

9.99

10

10.99

11

11.2

12

12.5

12.6

13.1

13.5

14

15

15.4

16

16.99

17

17.652

17.99

18

20

22

23

24

25

26

27

28

29

29.42

30

31

32

34

35

36

37.5

38

39.227

40

41

42

45

46

48

49.033

50

51

52

54

56

60

61

67

68

70

71

72

75

79

80

85

89

90

92

95

96

98.067

100

105

108

110

114

120

121

130

132

140

150

151

160

170

176.52

180

190

194

198

200

215.746

220

226

250

260

265

280

300

310

320

325

352

380

400

433

450

500

525

530

567

580

650

800

810

900

945

1060

1120

1350
Please refer to manufacturer's tech data. The calculaton method like safety factor for allowable torque differs depending on the manufacturers.
Clear

Max. Rotational Speed(r/min)
10,000

900

2000

3000

3500

3800

4000

4400

4500

4800

5000

5100

5200

5500

5800

5900

6000

6100

6200

6500

6800

7000

7400

7600

7900

8000

8700

9000

9500

9800

10000

11000

11900

12000

12500

13000

14000

15000

15900

16000

17000

18000

18200

19000

20000

21000

21700

22000

23000

23800

24000

25000

26000

31000

32000

33000

34100

37000

39000

40000

42000

43000

44100

45000

52000

53000

57000

60000

63000

65000

67000

78000

100000
Clear

Allowable Angular Misalignment(deg)
0.056

0.08

0.5

0.56

0.6

0.7

0.8

1

1.2

1.4

1.5

2

2.5

3

3.5
Clear

Allowable Lateral Misalignment Range(mm)
Less than 0.02

0.02~0.2

0.21~0.40

0.41~1.0

1.1~3.0

3.1~5.0

5.1~100
Clear

Allowable Lateral Misalignment(mm)
0.004(inch)

0.005(inch)

0.006(inch)

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