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

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	1000~less than 5000	42	56	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	42	57	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	42	58	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	42	59	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	42	60	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	43	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	44	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	45	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	46	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	47	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	48	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	49	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	50	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	51	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	52	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	53	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	54	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	55	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	56	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	57	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	58	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	59	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	43	60	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	44	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	45	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	46	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	47	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	48	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	49	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	50	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	51	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	52	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	53	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	54	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	55	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	56	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	57	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	58	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	59	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	44	60	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	45	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	46	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	47	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	48	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	49	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	50	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	51	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	52	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	53	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	54	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	55	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	56	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	57	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	58	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	59	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	45	60	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	46	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	47	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	48	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	49	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	50	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	51	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	52	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	53	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	54	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	55	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	56	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	57	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	58	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	59	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	46	60	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	47	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	48	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	49	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	50	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	51	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	52	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	53	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	54	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	55	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	56	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	57	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	58	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	59	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	47	60	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	8 Days	1000~less than 5000	48	48	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	48	49	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	48	50	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	48	51	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	B - Shore 64D
1 Piece(s)	21 Days	1000~less than 5000	48	52	102	126	4001~10000	1350	8000	0.02~0.2	-30～120	50	27000	120	450	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

986 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