Elastomer Couplings and Spider Couplings made by R+W

Properties of Elastomer Couplings:

  • vibration dampening
  • electrically insulating (standard)
  • backlash-free
  • press-fit design
  • lateral-, angular- and axial misalignment
    l
    lateral misalignment

    angular misalignment

    axial misalignment

Data table with values of static and dynamic torsional stiffness of Spieder Couplings.

Elastomer Couplings - Areas of applications:

  • in servo drives in:
    Machine tools
    Packaging machinery
    Plant automation
    Printing machinery
    Industrial robots
  • Measurement and positioning units
  • general mechanical engineering
  • Linking screw jacks
  • linear actuaters
  • encoders.

Elastomer Couplings EK

Please select a Elastomer / Jaw Coupling:
MODEL SERIES EK EKL and EK2 EKH EK6 EK7 EK1 EK4 EZ2 EZV ES2 ESL TX1

Backlash-free and compact Elastomer Couplings from R+W

Function: The equalizing element of an EK Elastomer Coupling is the elastomer insert. It transmits the torque without backlash and vibration. The elastomer insert defines the features of the entire coupling and/or of the entire drive system.

The coupling is backlash free due to pretensioning of the elastomer insert between the two coupling halves.The Servomax-Coupling compensates for lateral, angular and axial misalignment.

Type A
Shore hardness
98 Sh A		 Type B
Shore hardness
64 Sh D		 Type C
Shore hardness
80 Sh A		 Type D*
Shore hardness
92 Sh A

Elastomer Couplings: Specification of the Elastomer inserts

Type

Shore hardness

Color

Material

Relative damping ( ψ )

Temperature range

Properties

A

98 Sh A

red

TPU

0,4 - 0.5

-30°C to +100°C

high damping

B

64 Sh D

green

TPU

0,3 - 0,45

-30°C to +120°C

high Torsional stiffness

C

80 Sh A

yellow

TPU

0,3 - 0,4

-30°C to +100°C

very high damping

 D*

92 Sh A

black

TPU

0,3 - 0,45

-10°C to +70°C

electrically conductive*

* Due to the electrically conductiv properties of the insert electrostatically charge of the coupling is prevented. This eliminates sparks during normal operation (Explosive areas). Technical datas available.

The values of the relative damping were determined at 10 Hz and +20˚C.

Elastomer Couplings - general technical data: static and dynamic torsional stiffness, max. Shaft misalignment

Model EK Coupling series (2 - 60)
2 5 10 20 60
Type (Elastomer insert)   A B C A B C A B C A B C A B C
Static Torsional stiffness (Nm/rad) CT 50 115 17 150 350 53 260 600 90 1140 2500 520 3290 9750 1400
Dynamic
Torsional stiffness (Nm/rad)		 CTdyn 100 230 35 300 700 106 541 1650 224 2540 4440 876 7940 11900 1350
Lateral (mm) Max.
values		 0,08 0,06 0,1 0,08 0,06 0,1 0,1 0,08 0,12 0,1 0,08 0,15 0,12 0,1 0,15
Angular (degree) 1 0,8 1,2 1 0,8 1,2 1 0,8 1,2 1 0,8 1,2 1 0,8 1,2
Axial (mm) ±1 ±1 ±1 ±2 ±2

Model EK Coupling series (150 - 800)
150 300 450 800
Type (Elastomer insert)   A B C A B C A B C A B C
Static Torsional stiffness (Nm/rad) CT 4970 10600 1130 12400 18000 1280 15100 27000 4120 41300 66080 10320
Dynamic Torsional stiffness (Nm/rad) CTdyn 13400 29300 3590 23700 40400 6090 55400 81200 11600 82600 180150 28600
Lateral (mm) Max.
values		 0,15 0,12 0,2 0,18 0,14 0,25 0,2 0,18 0,25 0,25 0,2 0,3
Angular (degree) 1 0,8 1,2 1 0,8 1,2 1 0,8 1,2 1 0,8 1,2
Axial (mm) ±2 ±2 ±2 ±2

Static Torsional stiffness at 50% TKN     Dynamic Torsional stiffness at TKN      1 Nm = 8,85 in lbs

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Last update: 01-26-2006

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