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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/C/33/40
EK2/300/C/33/41
EK2/300/C/33/42
EK2/300/C/33/43
EK2/300/C/33/44
EK2/300/C/33/45
EK2/300/C/34/34
EK2/300/C/34/35
EK2/300/C/34/36
EK2/300/C/34/37
EK2/300/C/34/38
EK2/300/C/34/39
EK2/300/C/34/40
EK2/300/C/34/41
EK2/300/C/34/42
EK2/300/C/34/43
EK2/300/C/34/44
EK2/300/C/34/45
EK2/300/C/35/35
EK2/300/C/35/36
EK2/300/C/35/37
EK2/300/C/35/38
EK2/300/C/35/39
EK2/300/C/35/40
EK2/300/C/35/41
EK2/300/C/35/42
EK2/300/C/35/43
EK2/300/C/35/44
EK2/300/C/35/45
EK2/300/C/36/36
EK2/300/C/36/37
EK2/300/C/36/38
EK2/300/C/36/39
EK2/300/C/36/40
EK2/300/C/36/41
EK2/300/C/36/42
EK2/300/C/36/43
EK2/300/C/36/44
EK2/300/C/36/45
EK2/300/C/37/37
EK2/300/C/37/38
EK2/300/C/37/39
EK2/300/C/37/40
EK2/300/C/37/41
EK2/300/C/37/42
EK2/300/C/37/43
EK2/300/C/37/44
EK2/300/C/37/45
EK2/300/C/38/38
EK2/300/C/38/39
EK2/300/C/38/40
EK2/300/C/38/41
EK2/300/C/38/42
EK2/300/C/38/43
EK2/300/C/38/44
EK2/300/C/38/45
EK2/300/C/39/39
EK2/300/C/39/40
EK2/300/C/39/41
EK2/300/C/39/42
EK2/300/C/39/43
EK2/300/C/39/44
EK2/300/C/39/45
EK2/300/C/40/40
EK2/300/C/40/41
EK2/300/C/40/42
EK2/300/C/40/43
EK2/300/C/40/44
EK2/300/C/40/45
EK2/300/C/41/41
EK2/300/C/41/42
EK2/300/C/42/42
EK2/300/C/43/43
EK2/300/C/43/44
EK2/300/C/43/45
EK2/300/C/44/44
EK2/300/C/44/45
EK2/300/C/45/45
EK2/450/C/28/28
EK2/450/C/28/29
EK2/450/C/28/30
EK2/450/C/28/31
EK2/450/C/28/32
EK2/450/C/28/33
EK2/450/C/28/34
EK2/450/C/28/35
EK2/450/C/28/36
EK2/450/C/28/37
EK2/450/C/28/38
EK2/450/C/28/39

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	100~less than 500	33	40	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	33	41	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	33	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	33	43	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	33	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	33	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	34	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	35	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	36	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	37	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	38	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	39	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	40	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	41	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	43	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	34	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	35	35	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	35	36	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	35	37	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	35	38	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	35	39	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	35	40	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	35	41	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	35	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	35	43	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	35	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	35	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	36	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	37	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	38	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	39	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	40	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	41	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	43	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	36	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	37	37	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	37	38	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	37	39	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	37	40	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	37	41	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	37	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	37	43	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	37	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	37	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	38	38	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	38	39	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	38	40	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	38	41	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	38	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	38	43	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	38	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	38	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	39	39	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	39	40	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	39	41	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	39	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	39	43	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	39	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	39	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	40	40	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	40	41	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	40	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	40	43	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	40	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	40	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	41	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	41	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	8 Days	100~less than 500	42	42	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	43	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	43	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	44	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	44	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	45	45	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	C - Shore 80A
1 Piece(s)	21 Days	100~less than 500	28	28	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	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	39	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