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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/26/42
EK2/300/C/26/43
EK2/300/C/26/44
EK2/300/C/26/45
EK2/300/C/27/27
EK2/300/C/27/28
EK2/300/C/27/29
EK2/300/C/27/30
EK2/300/C/27/31
EK2/300/C/27/32
EK2/300/C/27/33
EK2/300/C/27/34
EK2/300/C/27/35
EK2/300/C/27/36
EK2/300/C/27/37
EK2/300/C/27/38
EK2/300/C/27/39
EK2/300/C/27/40
EK2/300/C/27/41
EK2/300/C/27/42
EK2/300/C/27/43
EK2/300/C/27/44
EK2/300/C/27/45
EK2/300/C/28/28
EK2/300/C/28/29
EK2/300/C/28/30
EK2/300/C/28/31
EK2/300/C/28/32
EK2/300/C/28/33
EK2/300/C/28/34
EK2/300/C/28/35
EK2/300/C/28/36
EK2/300/C/28/37
EK2/300/C/28/38
EK2/300/C/28/39
EK2/300/C/28/40
EK2/300/C/28/41
EK2/300/C/28/42
EK2/300/C/28/43
EK2/300/C/28/44
EK2/300/C/28/45
EK2/300/C/29/29
EK2/300/C/29/30
EK2/300/C/29/31
EK2/300/C/29/32
EK2/300/C/29/33
EK2/300/C/29/34
EK2/300/C/29/35
EK2/300/C/30/30
EK2/300/C/30/31
EK2/300/C/30/32
EK2/300/C/30/33
EK2/300/C/30/34
EK2/300/C/30/35
EK2/300/C/30/36
EK2/300/C/30/37
EK2/300/C/30/38
EK2/300/C/30/39
EK2/300/C/30/40
EK2/300/C/30/41
EK2/300/C/30/42
EK2/300/C/30/43
EK2/300/C/30/44
EK2/300/C/30/45
EK2/300/C/31/31
EK2/300/C/31/32
EK2/300/C/31/33
EK2/300/C/31/34
EK2/300/C/31/35
EK2/300/C/32/32
EK2/300/C/32/33
EK2/300/C/32/34
EK2/300/C/32/35
EK2/300/C/32/36
EK2/300/C/32/37
EK2/300/C/32/38
EK2/300/C/32/39
EK2/300/C/32/40
EK2/300/C/32/41
EK2/300/C/32/42
EK2/300/C/32/43
EK2/300/C/32/44
EK2/300/C/32/45
EK2/300/C/33/33
EK2/300/C/33/34
EK2/300/C/33/35
EK2/300/C/33/36
EK2/300/C/33/37
EK2/300/C/33/38
EK2/300/C/33/39

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	26	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	26	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	26	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	26	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	27	27	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	27	28	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	27	29	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	27	30	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	27	31	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	27	32	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	27	33	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	27	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	28	28	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	29	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	30	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	31	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	28	32	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	33	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	34	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	28	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	29	29	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	29	30	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	29	31	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	29	32	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	29	33	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	29	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	29	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	30	30	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	30	31	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	30	32	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	30	33	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	30	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	31	31	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	31	32	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	31	33	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	31	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	31	35	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	32	32	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	32	33	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	32	34	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	32	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	33	33	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	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	33	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	33	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	33	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	33	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	33	39	82	114	4001~10000	170	9000	0.21~0.40	-30～100	45	12400	70	300	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