Claw couplings / Hub clamping / Claw disc: PU / Body: aluminium, steel / EK2 / R+W ANTRIEBSELEMENTE

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Design
· Two concentrically machined hubs with curved jaws and one clamping screw on each side

Material
· Hubs:
up to 450 series – high-strength aluminum
from series 800 – steel
· Elastomer insert: wear-resistant thermally stable TPU

Temperature range
· Depending on elastomer insert

Features
· Easy mounting
· High concentricity
· Vibration damping

Part Number

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Product specification
Part Numbers
Catalog

EK2 with Clamping Hub 6 - 2,150 Nm

Product Properties

Features

• easy mounting
• highly concentric assembly
• vibration damping

Material

• Hubs: up to size 450 high strength
aluminum; size 800 steel
• Elastomer: wear resistant thermally stable TPU

Design

Two concentrically machined hubs with curved jaws and clamping screws.

Drawing

Specification

Size			20			60			150			300			450			800
Type (Elastomer insert)			A	B	C	A	B	C	A	B	C	A	B	C	A	B	C	A	B	C
Rated torque	(Nm)	T_KN	17	21	6	60	75	20	160	200	42	325	405	84	530	660	95	950	1100	240
Max. torque*	(Nm)	T_Kmax	34	42	12	120	150	35	320	400	85	650	810	170	1060	1350	190	1900	2150	400
Overall length	(mm)	A	66			78			90			114			126			162
Outside diameter	(mm)	B	42			56			66.5			82			102			136.5
Outside diameter with screw head	(mm)	B_S	44.5			57			68			85			105			139
Mounting length	(mm)	C	25			30			35			45			50			65
Inside diameter range H7	(mm)	D_1/2	8 - 25			12 - 32			19 - 36			20 - 45			28 - 60			35 - 80
Inside diameter of elastomer	(mm)	D_E	19.2			26.2			29.2			36.2			46.2			60.5
Clamping screw (ISO 4762)		E	M5			M6			M8			M10			M12			M16
Tightening torque of the clamping screw	(Nm)		8			15			35			70			120			290
Distance between centers	(mm)	F	15.5			21			24			29			38			50.5
Distance	(mm)	G	8.5			10			12			15			17.5			23
Hub length	(mm)	H	39			46			52.5			66			73			93.5
Moment of inertia per hub	(10^-3 kgm²)	J₁/J₂	0.016			0.05			0.13			0.4			0.9			9.5
Approx. weight	(kg)		0.15			0.35			0.6			1.1			1.7			10
Speed standard	(min^-1)		12,500			11,000			10,000			9,000			8,000			4,000
Speed balanced	(10³min^-1)		45	60	35	31	31	25	22	26	18	22	26	16	16	17	12	13	13	8

* Maximum transmittable torque of the clamping hub depends on the bore diameter

Size	Ø 8	Ø 16	Ø 19	Ø 25	Ø 30	Ø 32	Ø 35	Ø 45	Ø 50	Ø 55	Ø 60	Ø 65	Ø 70	Ø 75	Ø 80
20	20	35	45	60
60		50	80	100	110	120
150			120	160	180	200	220
300			200	230	300	350	380	420
450					420	480	510	600	660	750	850
800							700	750	800	835	865	900	925	950	1,000

Higher torque possible with keyways

Data to be displayed: 30; 45; 60

Part Number
EK2/20/A/[8-25/1]/[8-25/1]
EK2/60/A/[12-32/1]/[12-32/1]
EK2/150/A/[19-36/1]/[19-36/1]
EK2/300/A/[20-45/1]/[20-45/1]
EK2/450/A/[28-60/1]/[28-60/1]
EK2/800/A/[35-80/1]/[35-80/1]

Minimum order quantity	Standard Shipping Days ?	Allowable Torque Range (N•m)	Shaft Bore Dia. (machined) D1 (mm)	Shaft Bore Dia. (machined) D2 (mm)	Outer Dia. A (mm)	Overall Length W (mm)	Body Material	Allowable Torque (Nm)	Max. Rotational Speed (r/min)	Buffer Part Material	Moment of Inertia (kg･m²)
1	13 Days	10.01 to 20.00	8 ～ 25	8 ～ 25	42	66	Aluminum	34	12500	Polyurethane	0.000016
1	13 Days	50.01 to 100.00	12 ～ 32	12 ～ 32	56	78	Aluminum	120	11000	Polyurethane	0.00005
1	13 Days	100 to Less Than 500	19 ～ 36	19 ～ 36	66.5	90	Aluminum	320	10000	Polyurethane	0.00013
1	13 Days	100 to Less Than 500	20 ～ 45	20 ～ 45	82	114	Aluminum	650	9000	Polyurethane	0.0004
1	13 Days	500 to Less Than 1,000	28 ～ 60	28 ～ 60	102	126	Aluminum	1060	8000	Polyurethane	0.0009
1	13 Days	500 to Less Than 1,000	35 ～ 80	35 ～ 80	136.5	162	Steel	1900	4000	Polyurethane	0.00095

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Basic information

Type	Jaw Type

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Basic Attributes

Allowable Torque Range(N•m)
10.01 to 20.00

50.01 to 100.00

100 to Less Than 500

500 to Less Than 1,000
Clear
Shaft Bore Dia. (machined) D1(mm)
[8-80/1mm Unit(s)]
Clear
Shaft Bore Dia. (machined) D2(mm)
[8-80/1mm Unit(s)]
Clear
Outer Dia. A(mm)
42

56

66.5

82

102

136.5
Clear
Overall Length W(mm)
66

78

90

114

126

162
Clear
Body Material
Steel

Aluminum
Clear
Allowable Torque(Nm)
34

120

320

650

1060

1900
Clear
Max. Rotational Speed(r/min)
4000

8000

9000

10000

11000

12500
Clear
Type
- EK1
- EK2
Clear
Buffer Part Material
- Polyurethane
Clear