Claw couplings / grub screw clamping, feather key DIN 6885 / claw disc: PU / body: aluminium, steel / EK1 / R+W ANTRIEBSELEMENTE

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Design
· Two concentriclly machined hubs with curved jaws, keyways and set screws
· From series 2500 elastomer insert consists of five individual segments

Material
· Hubs:
up to 450 series – high-strength aluminum
from series 800 – steel
from series 2500 – GGG40
· Elastomer insert: wear-resistant thermally stable TPU

Temperature range
· Depending on elastomer insert

Features
· Low-priced
· High concentricity
· Low backlash (keyway)

Part Number

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EK1/800/A/[32-80/1]/[32-80/1]

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Product specification
Part Numbers
Catalog

EK1 Backlash Free Elastomer Couplings

Product Properties

With Keyway Connection	With Keyway Mounting
0.5 - 2,150 Nm	1,950 - 25,000 Nm

• economical design
• concentrically machined
• vibration damping
• electrically isolating
• press fit design
• low backlash, due to keyway connection

Material

• Coupling hub: up to series 450 high strength aluminum, series 800 and up steel
• Elastomer insert: precision molded, wear resistant, and thermally stable polymer

Design

Two coupling hubs are concentrically machined with curved jaws
Bore tolerance H7 + keyway + set screw per DIN 916
Optional pilot bore (D_V)

Speeds

See table below
* Please contact R+W
ISO 2.5 balance grade available

Tolerance

Overall clearance between shaft and hub 0.01 to 0.05 mm

Drawing

Series
2 - 800

Series
2500 - 9500

Specification

Size			2			5			10			20			60			150			300			450			800			2500		4500		9500
Type (Elastomer insert)			A	B	C	A	B	C	A	B	C	A	B	C	A	B	C	A	B	C	A	B	C	A	B	C	A	B	C	A	B	A	B	A	B
Rated torque	(Nm)	T_KN	2	2.4	0.5	9	12	2	12.5	16	4	17	21	6	60	75	20	160	200	42	325	405	84	530	660	95	950	1100	240	1950	2450	5000	6200	10000	12500
Max. torque	(Nm)	T_Kmax	4	4.8	1	18	24	4	25	32	6	34	42	12	120	150	35	320	400	85	650	810	170	1060	1350	190	1900	2150	400	3900	4900	10000	12400	20000	25000
Overall length	(mm)	A	20			34			35			66			78			90			114			126			162			213		272		341
Outside diameter	(mm)	B/B₁	15			25			32			42			56			66.5			82			102			136.5			160 / 154		225 / 190		290 / 240
Mounting length	(mm)	C	6.5			12			12			25			30			35			45			50			65			88		113		142
Inside diameter (pilot bored)	(mm)	D_V	3			4			6			7			9			14			16			22			29			30		40		50
Inside diameter range H7	(mm)	D_1/2	3 - 9			6 - 15			6 - 18			8 - 25			12 - 32			19 - 38			20 - 45			28 - 60			32 - 80			30 - 95		40 - 130		50 - 170
Inside diameter of elastomer	(mm)	D_E	6.2			10.2			14.2			19.2			26.2			29.2			36.2			46.2			60.5			80		111		145
Set screws (DIN 916)		E	see table (depending on bore Ø)**
Distance	(mm)	G	3			5			6			9			11			12			15			17			30			25		30		40
Possible shortening length	(mm)	H	4			6			6			19			22			26			32			37			43			69		89		110
Moment of inertia per hub	(10^-3 kgm²)	J₁/J₂	0.0001			0.001			0.003			0.02			0.06			0.1			0.4			1.1			12			40		147		480
Approx. weight	(kg)		0.008			0.03			0.08			0.15			0.35			0.6			1.1			1.7			11			12.5		25		53
Speed standard	(min^-1)		15,000			15,000			13,000			12,500			11,000			10,000			9,000			8,000			4,000			3.500		3.000		2.000
Speed balanced	(10³min^-1)		60	67	45	57	65	43	53	63	40	45	60	35	31	31	25	22	26	18	22	26	16	16	17	12	13	13	8	10	10	8	8	6.5	6.5

1 Nm = 8.85 in lbs

**Set screws
D₁/D₂	E
- Ø 10	M3
Ø 10.1 - 12	M4
Ø 12.1 - 30	M5
Ø 30.1 - 58	M8
Ø 58.1 - 95	M10
Ø 95.1 - 130	M12
Ø 130.1 - 170	M16

Hubs with bore diameter <6mm delivered without keyway.

Details of pilot bored coupling hubs (D_V)

It's critical that modifications of the hub are
machined concentrically and perpendiculart to the through bore.

EK1 hubs can be modified to customer specifcations.
The coupling hub may be shortened by dimension H.

Ordering Example

Ordering Example	EK1	60	A	19	24	XX
Model	•					Special designation only (e.g. special bore tolerance).
Series		•
Type Elastomer insert			•
Bore Ø D1 H7				•
Bore Ø D2 H7					•

All data is suject to change without notice.

Data to be displayed: 30; 45; 60

Part Number
EK1/800/A/[32-80/1]/[32-80/1]

Part Number	Minimum order quantity	Volume Discount	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	Max. Rotational Speed (r/min)	Buffer Part Material	Moment of Inertia (kg･m²)
	1		13 Days	500 to Less Than 1,000	29	32 ～ 80	136.5	162	Steel	4000	Polyurethane	0.012

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Basic information

Type	Jaw Type

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Basic Attributes

Allowable Torque Range(N•m)
1.01 to 3.00

5.01 to 10.00

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)
3

4

6

7

9

14

16

22

29
[32-80/1mm Unit(s)]
Clear
Shaft Bore Dia. (machined) D2(mm)
[32-80/1mm Unit(s)]
Clear
Outer Dia. A(mm)
15

25

32

42

56

66.5

82

102

136.5
Clear
Overall Length W(mm)
20

34

35

66

78

90

114

126

162
Clear
Max. Rotational Speed(r/min)
4000

8000

9000

10000

11000

12500

13000

15000
Clear
Buffer Part Material
- Polyurethane
Clear
Type
- EK1
Clear
Body Material
Steel

Aluminum
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Optional Attributes

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

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