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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
EK2/300/B/25/30
EK2/300/B/25/31
EK2/300/B/25/32
EK2/300/B/25/33
EK2/300/B/25/34
EK2/300/B/25/35
EK2/300/B/25/36
EK2/300/B/25/37
EK2/300/B/25/38
EK2/300/B/25/39
EK2/300/B/25/40
EK2/300/B/25/41
EK2/300/B/25/42
EK2/300/B/25/43
EK2/300/B/25/44
EK2/300/B/25/45
EK2/300/B/26/26
EK2/300/B/26/27
EK2/300/B/26/28
EK2/300/B/26/29
EK2/300/B/26/30
EK2/300/B/26/31
EK2/300/B/26/32
EK2/300/B/26/33
EK2/300/B/26/34
EK2/300/B/26/35
EK2/300/B/26/36
EK2/300/B/26/37
EK2/300/B/26/38
EK2/300/B/26/39
EK2/300/B/26/40
EK2/300/B/26/41
EK2/300/B/26/42
EK2/300/B/26/43
EK2/300/B/26/44
EK2/300/B/26/45
EK2/300/B/27/27
EK2/300/B/27/28
EK2/300/B/27/29
EK2/300/B/27/30
EK2/300/B/27/31
EK2/300/B/27/32
EK2/300/B/27/33
EK2/300/B/27/34
EK2/300/B/27/35
EK2/300/B/27/36
EK2/300/B/27/37
EK2/300/B/27/38
EK2/300/B/27/39
EK2/300/B/27/40
EK2/300/B/27/41
EK2/300/B/27/42
EK2/300/B/27/43
EK2/300/B/27/44
EK2/300/B/27/45
EK2/300/B/28/28
EK2/300/B/28/29
EK2/300/B/28/30
EK2/300/B/28/31
EK2/300/B/28/32
EK2/300/B/28/33
EK2/300/B/28/34
EK2/300/B/28/35
EK2/300/B/28/36
EK2/300/B/28/37
EK2/300/B/28/38
EK2/300/B/28/39
EK2/300/B/28/40
EK2/300/B/28/41
EK2/300/B/28/42
EK2/300/B/28/43
EK2/300/B/28/44
EK2/300/B/28/45
EK2/300/B/29/29
EK2/300/B/29/30
EK2/300/B/29/31
EK2/300/B/29/32
EK2/300/B/29/33
EK2/300/B/29/34
EK2/300/B/29/35
EK2/300/B/30/30
EK2/300/B/30/31
EK2/300/B/30/32
EK2/300/B/30/33
EK2/300/B/30/34
EK2/300/B/30/35
EK2/300/B/30/36
EK2/300/B/30/37
EK2/300/B/30/38
EK2/300/B/30/39

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)	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)	21 Days	500~less than 1000	25	30	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	31	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	25	32	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	33	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	34	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	25	35	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	36	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	37	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	25	38	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	39	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	25	40	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	41	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	25	42	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	43	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	44	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	25	45	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	26	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	27	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	28	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	29	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	30	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	31	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	32	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	33	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	34	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	35	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	36	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	37	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	38	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	39	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	40	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	41	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	42	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	43	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	44	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	26	45	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	27	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	28	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	29	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	30	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	31	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	32	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	33	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	34	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	35	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	36	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	37	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	38	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	39	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	40	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	41	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	42	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	43	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	44	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	27	45	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	28	28	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	29	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	30	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	31	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	28	32	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	33	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	34	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	28	35	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	36	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	37	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	28	38	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	39	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	28	40	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	41	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	8 Days	500~less than 1000	28	42	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	43	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	44	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	28	45	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	29	29	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	29	30	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	29	31	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	29	32	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	29	33	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	29	34	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	29	35	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	30	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	31	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	32	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	33	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	34	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	35	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	36	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	37	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	38	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	B - Shore 64D
1 Piece(s)	21 Days	500~less than 1000	30	39	82	114	4001~10000	810	9000	0.02~0.2	-30～120	45	18000	70	300	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

650 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

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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