Flexible Shaft Coupling Accessories - EK Series Elastomer Inserts
Backlash is eliminated by the press fit of the elastomer into the hubs. Through variation of the Shore hardness of the elastomer insert, the coupling system can be optimized for the ideal torsional characteristics.
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R+W Elastomer Couplings
Information
Axes of Misalignment
 |  |  | |||||
| Lateral | Angular | Axial | |||||
Function
| The equalizing element of the EK coupling is the elastomer insert. It transmits torque without backlash or vibration.The elastomer insert defines the characteristics of the entire drive system. | Backlash is eliminated by the press fit of the elastomer into the hubs. Through variation of the Shore hardness of the elastomer insert, the coupling system can be optimized for the ideal torsional characteristics. |
Sizes 2 - 800
Shore hardness 98 A Shore hardness 64 Sh D Shore hardness 80 Sh A Shore hardness 65 Sh D Shore hardness 64 Sh D
Sizes 2500 - 9500
The coupling includes 5x elastomer segments
Shore hardness 98 Sh A Shore hardness 64 Sh D Shore hardness 65 Sh D Shore hardness 64 Sh D
Specification
Description of the Elastomer Inserts
| Type | Shore hardness | Color | Material | Relative damping (Ψ) | Temperature range | Features | ||
| 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* | 65 Sh D | black | TPU | 0.3 - 0.45 | -10°C to +70°C | electrically conductive | ||
| E | 64 Sh D | beige | Hytrel | 0.3 - 0.45 | -50°C to +150°C | temperature resistant | ||
The values of the relative damping were determined at 10 Hz and +20˚ C.
Sizes EK
| SIZE | 2 | 5 | 10 | 20 | 60 | 150 | ||||||||||||||
| Type (Elastomer insert) | A | B | C | 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 | 4970 | 10600 | 2000 |
| Dynamic torsional stiffness | (Nm/rad) | CTdyn | 100 | 230 | 35 | 300 | 700 | 106 | 541 | 1650 | 224 | 2540 | 4440 | 876 | 7940 | 11900 | 2072 | 13400 | 29300 | 3590 |
| Lateral | (mm) | Max. values | 0.08 | 0.06 | 0.2 | 0.08 | 0.06 | 0.2 | 0.1 | 0.08 | 0.22 | 0.1 | 0.08 | 0.25 | 0.12 | 0.1 | 0.25 | 0.15 | 0.12 | 0.3 |
| 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 | 1 | 0.8 | 1.2 | |
| Axial | (mm) | ±1 | ±1 | ±1 | ±1.5 | ±1.5 | ±1.8 | |||||||||||||
| SIZE* | 300 | 450 | 800 | 2500 | 4500 | 9500 | |||||||||||
| Type (Elastomer insert) | A | B | C | A | B | C | A | B | C | A | B | A | B | A | B | ||
| Static torsional stiffness | (Nm/rad) | CT | 12400 | 18000 | 3000 | 15100 | 27000 | 4120 | 41300 | 66080 | 10320 | 87600 | 109000 | 167000 | 372000 | 590000 | 670000 |
| Dynamic torsional stiffness | (Nm/rad) | CTdyn | 23700 | 40400 | 6090 | 55400 | 81200 | 11600 | 82600 | 180150 | 28600 | 175000 | 216000 | 337000 | 743000 | 1180000 | 1340000 |
| Lateral | (mm) | Max. values | 0.18 | 0.14 | 0.35 | 0.2 | 0.18 | 0.35 | 0.25 | 0.2 | 0.4 | 0.5 | 0.3 | 0.5 | 0.3 | 0.6 | 0.4 |
| Angular | (Degree) | 1 | 0.8 | 1.2 | 1 | 0.8 | 1.2 | 1 | 0.8 | 1.2 | 1.5 | 1 | 1.5 | 1 | 1.5 | 1 | |
| Axial | (mm) | ±2 | ±2 | ±2 | ±3 | ±3 | ±4 | ||||||||||
* Note: The technical values for elastomer inserts D and E correspond to the values for B, due to the identical Shore hardness.
Part Number
|
|---|
| EK/9500/A |
| EK/9500/B |
| EK/9500/D |
| EK/9500/E |
| Part Number |
Standard Unit Price
| Minimum order quantity | Volume Discount | Allowable Torque Range (N•m) | Max. Rotational Speed Range (r/min) | Feature | Allowable Torque (Nm) | Max. Rotational Speed (r/min) | Allowable Lateral Misalignment Range (mm) | Allowable Lateral Misalignment (mm) | Allowable Angular Misalignment (deg) | Operating Temperature Range (°C) | Allowable Axial Clearance (±) (mm) | Torsional Stiffness (N-m/rad) | Size | Elastomer Insert | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
35.17 € | 5 | 12 Days | 10,000 to Less than 20,000 | 1,001 to 2,000 | Vibration Insulation | 10000 | 2000 | 0.41 to 1.0 | 0.6 | 1.5 | -30～100 | 4 | 590000 | 9500 | A - Shore 98A | ||
35.17 € | 5 | 12 Days | 10,000 to Less than 20,000 | 1,001 to 2,000 | High Torsional Rigidity | 12500 | 2000 | 0.21 to 0.40 | 0.4 | 1 | -30～120 | 4 | 670000 | 9500 | B - Shore 64D | ||
57.18 € | 5 | 12 Days | 10,000 to Less than 20,000 | 1,001 to 2,000 | - | 12500 | 2000 | 0.21 to 0.40 | 0.4 | 1 | -10～70 | 4 | 670000 | 9500 | D - Shore 65D | ||
138.00 € | 5 | 12 Days | 10,000 to Less than 20,000 | 1,001 to 2,000 | Heat Resistant | 12500 | 2000 | 0.21 to 0.40 | 0.4 | 1 | -50～150 | 4 | 670000 | 9500 | E - Shore 64D |
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Basic information
| Type | Jaw Type | Allowable Misalignment | Angular Misalignment / Eccentricity / Axial Misalignment | Body Material | Resin |
|---|---|---|---|---|---|
| Shaft D1 Keyway | Without Keyway | Shaft D2 Keyway | Without Keyway |
Configure
Basic Attributes
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Max. Rotational Speed Range(r/min)
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Feature
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Allowable Torque(Nm)
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Max. Rotational Speed(r/min)
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Allowable Lateral Misalignment Range(mm)
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Allowable Lateral Misalignment(mm)
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Allowable Angular Misalignment(deg)
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Torsional Stiffness(N-m/rad)
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Size
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Elastomer Insert
- B - Shore 64D
- E - Shore 64D
- D - Shore 65D
- C - Shore 80A
- A - Shore 98A
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Type
- A
- B
- C
- D
- E
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Allowable Torque Range(N•m)
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- 12 Days or Less
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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