Fenaflex Spacer Couplings
Fenaflex Spacer Couplings are highly flexible, non-lubricated couplings that withstand the large number of misalignments found on all aircraft and provide simple installation and inspection without interrupting the drive. The coupling also provides excellent vibration-damping performance while reducing vibration and torsional shock.
Fenaflex Spacer Couplings combine highly flexible elastomer tire elements with spacer flange assemblies to protect drivetrains from severe shock loads and torsional vibration. Specifically engineered for pump drives and centrifugal equipment, the removable spacer design allows pump maintenance or rotor removal without disturbing the drive motor or alignment (DBSE lengths from 80mm to 250mm). Available in standard and FRAS (Fire Resistant Anti-Static) tire construction, accommodating large misalignments up to 4° angular, 6mm parallel, and 8mm axial displacement.
Fenaflex Spacer Coupling Specifications & Dimensions
| Size | DBSE X (mm) | Dimensions (mm) | Bush Size / Max Bore | Mass (kg) | Inertia (kg·m²) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | E | F | G | H | J | JJ | L | M | Dp | Dm | ||||
| F40-RX12-100 | 100 | 104 | 82 | 118 | 83 | 150 | 25 | 14 | 12 | 14 | 29 | 81 | 22 | 1008-25 | 1210-32 | 5.10 | 0.0050 |
| F50-RX12-100 | 100 | 133 | 79 | 118 | 83 | 153 | 25 | 14 | 12 | 14 | 38 | 78 | 25 | 1210-32 | 1210-32 | 5.90 | 0.0580 |
| F50-RX16-100 | 100 | 133 | 79 | 127 | 80 | 156 | 25 | 18 | 15 | 14 | 38 | 78 | 25 | 1210-32 | 1610-42 | 6.30 | 0.0104 |
| F50-RX16-140 | 140 | 133 | 79 | 127 | 80 | 206 | 25 | 18 | 15 | 14 | 38 | 118 | 25 | 1210-32 | 1610-42 | 6.60 | 0.0105 |
| F60-RX16-100 | 100 | 165 | 70 | 127 | 80 | 156 | 25 | 18 | 15 | 14 | 38 | 70 | 33 | 1610-42 | 1610-42 | 7.90 | 0.0185 |
| F60-RX16-140 | 140 | 165 | 70 | 127 | 80 | 206 | 25 | 18 | 15 | 14 | 38 | 110 | 33 | 1610-42 | 1610-42 | 8.00 | 0.0186 |
| F70-RX25-100 | 100 | 187 | 80 | 178 | 123 | 179 | 45 | 22 | 15 | 19 | 13 | 79 | 23 | 2012-50 | 2517-60 | 14.0 | 0.0483 |
| F70-RX25-140 | 140 | 187 | 80 | 178 | 123 | 218 | 45 | 22 | 15 | 19 | 13 | 119 | 23 | 2012-50 | 2517-60 | 14.4 | 0.0486 |
| F70-RX25-180 | 180 | 187 | 80 | 178 | 123 | 259 | 45 | 22 | 15 | 19 | 13 | 159 | 23 | 2012-50 | 2517-60 | 14.9 | 0.0489 |
| F70-RX25-250 | 250 | 187 | 80 | 178 | 123 | 328 | 45 | 22 | 15 | 19 | 13 | 229 | 23 | 2012-50 | 2517-60 | 15.8 | 0.0494 |
| F80-RX25-140 | 140 | 211 | 95 | 178 | 123 | 232 | 45 | 22 | 15 | 19 | 16 | 117 | 25 | 2517-60 | 2517-60 | 17.8 | 0.0686 |
| F80-RX25-180 | 180 | 211 | 95 | 178 | 123 | 272 | 45 | 22 | 15 | 19 | 16 | 157 | 25 | 2517-60 | 2517-60 | 18.2 | 0.0669 |
| F80-RX25-250 | 250 | 211 | 95 | 178 | 123 | 342 | 45 | 22 | 15 | 19 | 16 | 227 | 25 | 2517-60 | 2517-60 | 19.0 | 0.0675 |
| F90-RX25-140 | 140 | 235 | 108 | 178 | 123 | 231 | 45 | 22 | 15 | 19 | 16 | 114 | 27 | 2517-60 | 2517-60 | 22.0 | 0.0916 |
| F90-RX25-180 | 180 | 235 | 108 | 178 | 123 | 271 | 45 | 22 | 15 | 19 | 16 | 154 | 27 | 2517-60 | 2517-60 | 22.4 | 0.0919 |
| F90-RX30-140 | 140 | 235 | 108 | 216 | 146 | 237 | 51 | 29 | 20 | 28 | 16 | 114 | 27 | 3020-75 | 3020-75 | 25.0 | 0.1290 |
| F90-RX30-180 | 180 | 235 | 108 | 216 | 146 | 277 | 51 | 29 | 20 | 28 | 16 | 154 | 27 | 3020-75 | 3020-75 | 25.5 | 0.1300 |
| F90-RX30-250 | 250 | 235 | 108 | 216 | 146 | 347 | 51 | 29 | 20 | 28 | 16 | 224 | 27 | 3020-75 | 3020-75 | 27.3 | 0.1320 |
| F100-RX30-140 | 140 | 254 | 120 | 216 | 146 | 245 | 51 | 29 | 20 | 28 | 16 | 114 | 27 | 3020-75 | 3020-75 | 30.8 | 0.1770 |
| F100-RX30-180 | 180 | 254 | 120 | 216 | 146 | 285 | 51 | 29 | 20 | 28 | 16 | 154 | 27 | 3020-75 | 3020-75 | 31.3 | 0.1780 |
| F100-RX30-250 | 250 | 254 | 120 | 216 | 146 | 355 | 51 | 29 | 20 | 28 | 16 | 224 | 27 | 3020-75 | 3020-75 | 32.2 | 0.1800 |
| F110-RX30-140 | 140 | 279 | 134 | 216 | 146 | 245 | 51 | 29 | 20 | 28 | 16 | 118 | 25 | 3020-75 | 3020-75 | 34.4 | 0.2410 |
| F110-RX30-180 | 180 | 279 | 134 | 216 | 146 | 285 | 51 | 29 | 20 | 28 | 16 | 158 | 25 | 3020-75 | 3020-75 | 34.9 | 0.2420 |
| F110-RX30-250 | 250 | 279 | 134 | 216 | 146 | 355 | 51 | 29 | 20 | 28 | 16 | 228 | 25 | 3020-75 | 3020-75 | 36.0 | 0.2430 |
| F110-RX35-140 | 140 | 279 | 134 | 248 | 178 | 259 | 65 | 34 | 25 | 25 | 16 | 118 | 25 | 3020-75 | 3020-95 | 48.9 | 0.3050 |
| F110-RX35-180 | 180 | 279 | 134 | 248 | 178 | 299 | 65 | 34 | 25 | 25 | 16 | 158 | 25 | 3020-75 | 3020-95 | 50.8 | 0.3080 |
| F110-RX35-250 | 250 | 279 | 134 | 248 | 178 | 369 | 65 | 34 | 25 | 25 | 16 | 228 | 25 | 3020-75 | 3020-95 | 54.2 | 0.3140 |
| F120-RX35-140 | 140 | 314 | 140 | 248 | 178 | 273 | 65 | 34 | 25 | 28 | 16 | 114 | 29 | 3525-95 | 3525-95 | 52.2 | 0.4430 |
| F120-RX35-180 | 180 | 314 | 140 | 248 | 178 | 313 | 65 | 34 | 25 | 28 | 16 | 154 | 29 | 3525-95 | 3525-95 | 52.8 | 0.4440 |
| F120-RX35-250 | 250 | 314 | 140 | 248 | 178 | 383 | 65 | 34 | 25 | 28 | 16 | 224 | 29 | 3525-95 | 3525-95 | 54.6 | 0.4460 |
| F140-RX35-180 | 180 | 359 | 178 | 248 | 178 | 312 | 65 | 34 | 25 | 17 | 17 | 150 | 32 | 3525-95 | 3525-95 | 65.1 | 0.6820 |
| F140-RX35-250 | 250 | 359 | 178 | 248 | 178 | 382 | 65 | 34 | 25 | 17 | 17 | 220 | 32 | 3525-95 | 3525-95 | 66.7 | 0.6860 |
| F140-RX40-180 | 180 | 359 | 178 | 298 | 210 | 324 | 77 | 35 | 25 | 17 | 17 | 150 | 32 | 3525-95 | 4030-110 | 85.4 | 0.8330 |
| F140-RX40-250 | 250 | 359 | 178 | 298 | 210 | 394 | 77 | 35 | 25 | 17 | 17 | 220 | 32 | 3525-95 | 4030-110 | 91.4 | 0.8520 |
| F160-RX40-180 | 180 | 402 | 197 | 298 | 210 | 337 | 77 | 35 | 25 | 28 | 19 | 153 | 30 | 4030-110 | 4030-110 | 96.0 | 1.1210 |
| F160-RX40-250 | 250 | 402 | 197 | 298 | 210 | 407 | 77 | 35 | 25 | 28 | 19 | 223 | 30 | 4030-110 | 4030-110 | 99.2 | 1.1300 |
| F180-RX45-180 | 180 | 470 | 205 | 330 | 230 | 319 | 77 | 40 | 30 | 38 | 19 | 137 | 46 | 4535-120 | 4535-120 | 128.1 | 2.2000 |
| F180-RX45-250 | 250 | 470 | 205 | 330 | 230 | 419 | 89 | 40 | 30 | 38 | 19 | 207 | 46 | 4535-120 | 4535-120 | 139.2 | 2.3080 |
Key Design Features & Performance
- Pump Maintenance Advantage: Spacer design provides standard Distance Between Shaft Ends (DBSE) from 80mm to 250mm, enabling pump impeller/seal servicing without disconnecting the motor.
- High Misalignment Tolerance: High-grade synthetic rubber tire accommodates up to 4° angular, 6mm parallel, and 8mm axial misalignments to prevent premature shaft bearing wear.
- Internal Load Carrying Cord: Reinforcing internal wires are wound in opposing directions, facilitating dual-direction drive and reverse rotation capabilities.
- Vibration & Shock Damping: Highly resilient flexible element isolates shock loads, reduces torsional vibration, and requires zero lubrication.
- Taper Lock Bushing Mounts: Compatible with standard F & H taper lock bushings or B-style pilot bore flanges for rapid installation and removal.
Looking for custom DBSE dimensions, replacement tire inserts, or complete drive assemblies? Explore our full range of Industrial Flexible Shaft Couplings or contact our engineering team for OEM/ODM drawings and custom quotes.
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How to choose power transmissions parts and industrial products which meet our requirement
| Chains | Sprockets | Pulleys | Timing belt Pulley | V-belt Pulley |
| Sheaves | Coupings | Bush &Hub | Gear& Rack | V-Belt |
| Locking Assembly | Pulley | Gearbox | Reducer | Shaft Collar |
| Rod End Bearing | Clevis | PTO | Chain Guide | Belt Guide |
| Rubber Buffer | Chain Tensioner | PTO Drive Shafts | Universal Joints | Roller Chains |
| Conveyor Chains | V-Belts | Worm Gearbox | Helical Gear | Worm |
| Agricultural Chain | CNC Proces Parts | Casting | Stamping | |
| Powder Metallurgy | CNC Proces Parts | Casting | Stamping |
What Products Do you sell ?
We are a group of factories, give customer one stop solution of power transmission and industrial products. We are in the position to supply wide range of products, including chains, sprockets, v-belt and v-belt pulleys, timing belt and timing belt pulleys, gears, speed reducers, motors, racks, couplings, and many other parts, like locking assembly, taper bushing, Chain guide, shaft collar, torque limiter, cam clutch, universal joint, motor base and motor slide, rod end, clevis, rubber mount, etc. We make special parts according to drawings and/or samples.
How to choose a gearbox which meets our requirement?
You can refer to our catalogue to choose the gearbox or we can help to choose when you provide
the technical information of required output torque, output speed and motor parameter etc.
What information shall we give before placing a purchase order?
a) Type of the gearbox, ratio, input and output type, input flange, mounting position, and motor informationetc.
b) Housing color.
c) Purchase quantity.
d) Other special requirements.
What industries are your gearboxes being used?
Our gearboxes are widely used in the areas of textile, food processing, beverage, chemical industry,
escalator,automatic storage equipment, metallurgy, tabacco, environmental protection, logistics and etc.
What is the producing process?
Production process including raw material cutting, machine processing, grinding, accessories cleaning, assemble, cleaning, stoving, oil coating, cover pressing, testing, package.
How to control the products quality?
Combining advanced equipment and strict management, we provide high standard and quality bearings for our customers all over the world.
What is the transportation?
-If small quantity , we Suggest to send by express, such as DHL,UPS, TNT FEDEX. If large amount, by air or sea shipping.
Can we design packaging?
-Yes. Default is regular packing, and we can make customer's own packing.
Can you provide OEM service?
-Yes, we work on OEM orders. Which means size, quantity, design, packing solution, etc will depend on your requests; and your logo will be customized on our products.
Can you give me discount on Power Transmissions Parts and Industrial parts?
-Yes, of course. Pls. send me your Email, you'll get more
Q: Are You a trading company or a manufacturer?
A: We Are the factory and have our Own trading company
Q: How Can I get an offer?
A: please send US quotation information: drawings, materials, weight, quantity and requirements, we can accept PDF, ISGS, DWG, STEP file format. If you don't have the drawings, please send us the samples, we can also quote you according to your samples.
Q: What is your minimum order size?
A: it is usually 100 pieces, but a low quantity is acceptable under some special circumstances.
Q: Do you provide samples? Is it free or extra?
A: Yes, we can provide samples free of charge, but we don't pay the freight.
Q: What is the lead time for mass production?
A: honestly, it depends on the number of orders. Normally, if you don't need the tools, deposit them after 30 days or so.
Q: What if the parts don't Work?
A: we can guarantee the quality, but if it happens, please contact us immediately, take some photos, we will check the problem and solve it as soon as possible.
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A: payment is less than US $1000,100% in advance. Payment: $1000,50% wire transfer in advance, balance before shipment,Other Terms of payment are negotiable









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