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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/28/40
EK2/450/C/28/41
EK2/450/C/28/42
EK2/450/C/28/43
EK2/450/C/28/44
EK2/450/C/28/45
EK2/450/C/28/46
EK2/450/C/28/47
EK2/450/C/28/48
EK2/450/C/28/49
EK2/450/C/28/50
EK2/450/C/28/51
EK2/450/C/28/52
EK2/450/C/28/53
EK2/450/C/28/54
EK2/450/C/28/55
EK2/450/C/28/56
EK2/450/C/28/57
EK2/450/C/28/58
EK2/450/C/28/59
EK2/450/C/28/60
EK2/450/C/29/29
EK2/450/C/29/30
EK2/450/C/29/31
EK2/450/C/29/32
EK2/450/C/29/33
EK2/450/C/29/34
EK2/450/C/29/35
EK2/450/C/30/30
EK2/450/C/30/31
EK2/450/C/30/32
EK2/450/C/30/33
EK2/450/C/30/34
EK2/450/C/30/35
EK2/450/C/30/36
EK2/450/C/30/37
EK2/450/C/30/38
EK2/450/C/30/39
EK2/450/C/30/40
EK2/450/C/30/41
EK2/450/C/30/42
EK2/450/C/30/43
EK2/450/C/30/44
EK2/450/C/30/45
EK2/450/C/30/46
EK2/450/C/30/47
EK2/450/C/30/48
EK2/450/C/30/49
EK2/450/C/30/50
EK2/450/C/30/51
EK2/450/C/30/52
EK2/450/C/30/53
EK2/450/C/30/54
EK2/450/C/30/55
EK2/450/C/30/56
EK2/450/C/30/57
EK2/450/C/30/58
EK2/450/C/30/59
EK2/450/C/30/60
EK2/450/C/31/31
EK2/450/C/31/32
EK2/450/C/31/33
EK2/450/C/31/34
EK2/450/C/31/35
EK2/450/C/32/32
EK2/450/C/32/33
EK2/450/C/32/34
EK2/450/C/32/35
EK2/450/C/32/36
EK2/450/C/32/37
EK2/450/C/32/38
EK2/450/C/32/39
EK2/450/C/32/40
EK2/450/C/32/41
EK2/450/C/32/42
EK2/450/C/32/43
EK2/450/C/32/44
EK2/450/C/32/45
EK2/450/C/32/46
EK2/450/C/32/47
EK2/450/C/32/48
EK2/450/C/32/49
EK2/450/C/32/50
EK2/450/C/32/51
EK2/450/C/32/52
EK2/450/C/32/53
EK2/450/C/32/54
EK2/450/C/32/55
EK2/450/C/32/56
EK2/450/C/32/57

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	100~less than 500	28	40	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	29	29	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	29	30	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	29	31	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	29	32	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	29	33	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	29	34	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	29	35	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	30	30	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	30	31	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	30	32	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	30	33	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	30	34	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	30	35	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	30	36	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	30	37	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	30	38	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	30	39	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	30	40	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	31	31	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	31	32	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	31	33	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	31	34	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	31	35	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	32	32	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	32	33	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	32	34	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	32	35	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	32	36	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	32	37	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	32	38	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	32	39	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	32	40	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	32	41	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	57	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