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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
EK2/450/C/40/42
EK2/450/C/41/41
EK2/450/C/41/42
EK2/450/C/41/43
EK2/450/C/41/44
EK2/450/C/41/45
EK2/450/C/41/46
EK2/450/C/41/47
EK2/450/C/41/48
EK2/450/C/41/49
EK2/450/C/41/50
EK2/450/C/41/51
EK2/450/C/41/52
EK2/450/C/41/53
EK2/450/C/41/54
EK2/450/C/41/55
EK2/450/C/41/56
EK2/450/C/41/57
EK2/450/C/41/58
EK2/450/C/41/59
EK2/450/C/41/60
EK2/450/C/42/42
EK2/450/C/42/43
EK2/450/C/42/44
EK2/450/C/42/45
EK2/450/C/42/46
EK2/450/C/42/47
EK2/450/C/42/48
EK2/450/C/42/49
EK2/450/C/42/50
EK2/450/C/42/51
EK2/450/C/42/52
EK2/450/C/42/53
EK2/450/C/42/54
EK2/450/C/42/55
EK2/450/C/42/56
EK2/450/C/42/57
EK2/450/C/42/58
EK2/450/C/42/59
EK2/450/C/42/60
EK2/450/C/43/43
EK2/450/C/43/44
EK2/450/C/43/45
EK2/450/C/43/46
EK2/450/C/43/47
EK2/450/C/43/48
EK2/450/C/43/49
EK2/450/C/43/50
EK2/450/C/43/51
EK2/450/C/43/52
EK2/450/C/43/53
EK2/450/C/43/54
EK2/450/C/43/55
EK2/450/C/43/56
EK2/450/C/43/57
EK2/450/C/43/58
EK2/450/C/43/59
EK2/450/C/43/60
EK2/450/C/44/44
EK2/450/C/44/45
EK2/450/C/44/46
EK2/450/C/44/47
EK2/450/C/44/48
EK2/450/C/44/49
EK2/450/C/44/50
EK2/450/C/44/51
EK2/450/C/44/52
EK2/450/C/44/53
EK2/450/C/44/54
EK2/450/C/44/55
EK2/450/C/44/56
EK2/450/C/44/57
EK2/450/C/44/58
EK2/450/C/44/59
EK2/450/C/44/60
EK2/450/C/45/45
EK2/450/C/45/46
EK2/450/C/45/47
EK2/450/C/45/48
EK2/450/C/45/49
EK2/450/C/45/50
EK2/450/C/45/51
EK2/450/C/45/52
EK2/450/C/45/53
EK2/450/C/45/54
EK2/450/C/45/55
EK2/450/C/45/56
EK2/450/C/45/57
EK2/450/C/45/58
EK2/450/C/45/59

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	40	42	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	41	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	42	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	43	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	44	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	45	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	46	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	47	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	48	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	49	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	50	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	51	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	52	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	53	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	54	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	55	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	56	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	57	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	58	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	59	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	60	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	42	42	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	43	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	44	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	45	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	46	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	47	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	42	48	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	49	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	50	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	51	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	52	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	53	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	54	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	42	55	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	56	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	57	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	58	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	59	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	42	60	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	43	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	44	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	45	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	46	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	47	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	48	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	49	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	50	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	51	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	52	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	53	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	54	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	55	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	56	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	57	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	58	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	59	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	60	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	44	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	45	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	46	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	47	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	48	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	49	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	50	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	51	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	52	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	53	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	54	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	55	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	56	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	57	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	58	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	59	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	60	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	45	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	46	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	47	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	48	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	49	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	50	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	51	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	52	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	53	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	54	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	55	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	56	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	57	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	58	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	59	102	126	4001~10000	190	8000	0.21~0.40	-30～100	50	4120	120	450	C - Shore 80A

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

1,381 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

500~less than 1000

1000~less than 5000
Clear
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
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 Lateral Misalignment Range(mm)
0.02~0.2

0.21~0.40
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

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)

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 Lateral Misalignment Range(mm)

CAD