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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/33/35
EK2/450/B/33/36
EK2/450/B/33/37
EK2/450/B/33/38
EK2/450/B/33/39
EK2/450/B/33/40
EK2/450/B/33/41
EK2/450/B/33/42
EK2/450/B/33/43
EK2/450/B/33/44
EK2/450/B/33/45
EK2/450/B/33/46
EK2/450/B/33/47
EK2/450/B/33/48
EK2/450/B/33/49
EK2/450/B/33/50
EK2/450/B/33/51
EK2/450/B/33/52
EK2/450/B/33/53
EK2/450/B/33/54
EK2/450/B/33/55
EK2/450/B/33/56
EK2/450/B/33/57
EK2/450/B/33/58
EK2/450/B/33/59
EK2/450/B/33/60
EK2/450/B/34/34
EK2/450/B/34/35
EK2/450/B/34/36
EK2/450/B/34/37
EK2/450/B/34/38
EK2/450/B/34/39
EK2/450/B/34/40
EK2/450/B/34/41
EK2/450/B/34/42
EK2/450/B/34/43
EK2/450/B/34/44
EK2/450/B/34/45
EK2/450/B/34/46
EK2/450/B/34/47
EK2/450/B/34/48
EK2/450/B/34/49
EK2/450/B/34/50
EK2/450/B/34/51
EK2/450/B/34/52
EK2/450/B/34/53
EK2/450/B/34/54
EK2/450/B/34/55
EK2/450/B/34/56
EK2/450/B/34/57
EK2/450/B/34/58
EK2/450/B/34/59
EK2/450/B/34/60
EK2/450/B/35/35
EK2/450/B/35/36
EK2/450/B/35/37
EK2/450/B/35/38
EK2/450/B/35/39
EK2/450/B/35/40
EK2/450/B/35/41
EK2/450/B/35/42
EK2/450/B/35/43
EK2/450/B/35/44
EK2/450/B/35/45
EK2/450/B/35/46
EK2/450/B/35/47
EK2/450/B/35/48
EK2/450/B/35/49
EK2/450/B/35/50
EK2/450/B/35/51
EK2/450/B/35/52
EK2/450/B/35/53
EK2/450/B/35/54
EK2/450/B/35/55
EK2/450/B/35/56
EK2/450/B/35/57
EK2/450/B/35/58
EK2/450/B/35/59
EK2/450/B/35/60
EK2/450/B/36/36
EK2/450/B/36/37
EK2/450/B/36/38
EK2/450/B/36/39
EK2/450/B/36/40
EK2/450/B/36/41
EK2/450/B/36/42
EK2/450/B/36/43
EK2/450/B/36/44
EK2/450/B/36/45
EK2/450/B/36/46

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	33	35	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	33	36	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	33	37	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	33	38	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	33	39	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	33	40	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	33	41	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	33	42	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	33	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	34	34	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	34	35	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	34	36	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	34	37	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	34	38	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	34	39	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	34	40	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	34	41	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	34	42	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	34	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	35	35	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	35	36	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	35	37	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	35	38	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	35	39	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	35	40	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	35	41	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	35	42	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	35	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	35	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	35	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	35	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	35	47	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	35	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	35	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	35	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	35	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	35	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	35	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	35	54	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	35	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	35	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	35	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	35	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	35	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	35	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	36	36	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	36	37	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	36	38	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	36	39	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	36	40	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	36	41	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	36	42	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	36	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	36	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	36	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	36	46	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

2,949 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
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
Max. Rotational Speed Range(r/min)
4001~10000

10001~78000
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)

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

Max. Rotational Speed Range(r/min)

CAD