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.

Description

Fenaflex Spacer Coupling

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

Fenaflex Spacer Coupling Dimensions Diagram

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.

Fenaflex Spacer Coupling Application

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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