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Flexible Couplings - zero backlash, EK2 series. (Part Numbers)

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.

Part Number

Configured Part Number is shown.

Product Specifications
Part Numbers

: 30; 60; 90

Part Number
EK2/60/B/19/22
EK2/60/B/19/23
EK2/60/B/19/24
EK2/60/B/19/25
EK2/60/B/19/26
EK2/60/B/19/27
EK2/60/B/19/28
EK2/60/B/19/29
EK2/60/B/19/30
EK2/60/B/19/31
EK2/60/B/19/32
EK2/60/B/20/20
EK2/60/B/20/21
EK2/60/B/20/22
EK2/60/B/20/23
EK2/60/B/20/24
EK2/60/B/20/25
EK2/60/B/20/26
EK2/60/B/20/27
EK2/60/B/20/28
EK2/60/B/20/29
EK2/60/B/20/30
EK2/60/B/20/31
EK2/60/B/20/32
EK2/60/B/21/21
EK2/60/B/21/22
EK2/60/B/21/23
EK2/60/B/21/24
EK2/60/B/21/25
EK2/60/B/21/26
EK2/60/B/21/27
EK2/60/B/21/28
EK2/60/B/21/29
EK2/60/B/21/30
EK2/60/B/21/31
EK2/60/B/21/32
EK2/60/B/22/22
EK2/60/B/22/23
EK2/60/B/22/24
EK2/60/B/22/25
EK2/60/B/22/26
EK2/60/B/22/27
EK2/60/B/22/28
EK2/60/B/22/29
EK2/60/B/22/30
EK2/60/B/22/31
EK2/60/B/22/32
EK2/60/B/23/23
EK2/60/B/23/24
EK2/60/B/23/25
EK2/60/B/23/26
EK2/60/B/23/27
EK2/60/B/23/28
EK2/60/B/23/29
EK2/60/B/23/30
EK2/60/B/23/31
EK2/60/B/23/32
EK2/60/B/24/24
EK2/60/B/24/25
EK2/60/B/24/26
EK2/60/B/24/27
EK2/60/B/24/28
EK2/60/B/24/29
EK2/60/B/24/30
EK2/60/B/24/31
EK2/60/B/24/32
EK2/60/B/25/25
EK2/60/B/25/26
EK2/60/B/25/27
EK2/60/B/25/28
EK2/60/B/25/29
EK2/60/B/25/30
EK2/60/B/25/31
EK2/60/B/25/32
EK2/60/B/26/26
EK2/60/B/26/27
EK2/60/B/26/28
EK2/60/B/26/29
EK2/60/B/26/30
EK2/60/B/26/31
EK2/60/B/26/32
EK2/60/B/27/27
EK2/60/B/27/28
EK2/60/B/27/29
EK2/60/B/27/30
EK2/60/B/27/31
EK2/60/B/27/32
EK2/60/B/28/28
EK2/60/B/28/29
EK2/60/B/28/30

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)	Max. Rotational Speed Range (r/min)	Allowable Torque (N•m)	Max. Rotational Speed (r/min)	Allowable Lateral Misalignment Range (mm)	Operating Temperature Range (℃)	Fit Length (mm) (mm)	Torsional Stiffness (N-m/rad) (N-m/rad)	Tightening Torque of the Fastening Screw (N-m) (N-m)	Size	Elastomer Insert
1 Piece(s)	8 Days	100~less than 500	19	22	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	19	23	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	19	24	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	19	25	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	19	26	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	19	27	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	19	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	19	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	19	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	19	31	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	19	32	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	20	20	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	20	21	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	5 Days	100~less than 500	20	22	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	20	23	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	5 Days	100~less than 500	20	24	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	5 Days	100~less than 500	20	25	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	20	26	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	20	27	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	20	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	20	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	20	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	20	31	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	20	32	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	21	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	22	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	23	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	24	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	25	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	26	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	27	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	31	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	21	32	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	22	22	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	22	23	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	22	24	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	22	25	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	22	26	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	22	27	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	22	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	22	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	22	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	22	31	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	22	32	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	23	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	24	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	25	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	26	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	27	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	31	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	23	32	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	24	24	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	24	25	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	24	26	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	24	27	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	24	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	24	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	24	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	24	31	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	24	32	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	25	25	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	25	26	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	25	27	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	25	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	25	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	25	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	25	31	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	25	32	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	26	26	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	26	27	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	26	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	26	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	26	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	26	31	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	26	32	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	27	27	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	27	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	27	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	27	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	27	31	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	27	32	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	28	28	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	21 Days	100~less than 500	28	29	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D
1 Piece(s)	8 Days	100~less than 500	28	30	56	78	10001~78000	150	11000	0.02~0.2	-30～120	30	9750	15	60	B - Shore 64D

Basic Information

Type	Jaw Type	Application	Servo Motor / Stepping Motor	Feature	No Backlash
Body Material	Aluminum	Allowable Angular Misalignment(deg)	1	Allowable Lateral Misalignment(mm)	0.15
Buffer Part Material	Polyurethane	Allowable Axial Misalignment (±)(mm)	2	Moment of Inertia(kg･m²)	0.00026

Configure

1,610 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

For Shaft Size D1(mm)
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
Clear
For Shaft Size D2(mm)
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
Clear
Outer Dia. A(Ø)
42

56

66.5

82

102
Clear
Overall Length W(mm)
66

78

90

114

126
Clear
Max. Rotational Speed Range(r/min)
4001~10000

10001~78000
Clear
Allowable Torque(N•m)
12

34

35

42

85

120

150

170

190

320

400

650

810

1060

1350
Clear
Max. Rotational Speed(r/min)
8000

9000

10000

11000

12500
Clear
Allowable Lateral Misalignment Range(mm)
0.02~0.2

0.21~0.40
Clear
Fit Length (mm)(mm)
25

30

35

45

50
Clear
Torsional Stiffness (N-m/rad)(N-m/rad)
520

1140

1400

2000

2500

3290

4120

4970

9750

10600

12400

15100

18000

27000
Clear
Tightening Torque of the Fastening Screw (N-m)(N-m)
8

15

35

70

120
Clear
Size
20

60

150

300

450
Clear
Elastomer Insert
- B - Shore 64D
- C - Shore 80A
- A - Shore 98A
Clear
Allowable Torque Range(N•m)
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
CAD
- 3D
Clear

Days to Ship

All

5 Days or Less

8 Days or Less

21 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 - zero backlash, EK2 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)

Max. Rotational Speed Range(r/min)

Allowable Torque(N•m)

Max. Rotational Speed(r/min)

Allowable Lateral Misalignment Range(mm)

Fit Length (mm)(mm)

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

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

Size

Elastomer Insert

Allowable Torque Range(N•m)

CAD