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Shrink Disc RfN 4071 Standard Series/split

Standard series – this range is the most popular, being used in most applications.

RINGFEDER® RfN 4071

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metric inch
CAD d D dw d1 L L1 L3 T P nSc DG TA
  mm mm mm mm mm mm mm Nm N/mm2 Stück mm Nm
  220 370 160 270 114 104 88 95000 248 15 16 250
  220 370 165 270 114 104 88 102000 248 15 16 250
  220 370 170 270 114 104 88 110000 248 15 16 250
  240 405 170 295 122 109 92 120000 272 12 20 490
  240 405 180 295 122 109 92 138000 272 12 20 490
  240 405 190 295 122 109 92 156000 272 12 20 490
  260 430 190 321 133 120 103 164000 262 14 20 490
  260 430 200 321 133 120 103 184000 262 14 20 490
  260 430 210 321 133 120 103 205000 262 14 20 490
  280 460 210 346 147 134 114 217000 251 16 20 490
  280 460 220 346 147 134 114 244000 251 16 20 490
  280 460 230 346 147 134 114 270000 251 16 20 490
  300 485 230 364 155 142 122 275000 246 18 20 490
  300 485 240 364 155 142 122 295000 246 18 20 490
  300 485 245 364 155 142 122 315000 246 18 20 490
  320 520 240 386 155 142 122 312000 257 20 20 490
  320 520 250 386 155 142 122 340000 257 20 20 490
  320 520 260 386 155 142 122 374000 257 20 20 490
  340 570 250 408 169 156 134 390000 264 24 20 490
  340 570 260 408 169 156 134 422500 264 24 20 490
  340 570 270 408 169 156 134 460000 264 24 20 490
  350 580 270 432 175 162 140 442000 245 24 20 490
  350 580 280 432 175 162 140 480000 245 24 20 490
  350 580 285 432 175 162 140 500000 245 24 20 490
  360 590 280 432 175 162 140 463000 238 24 20 490
  360 590 290 432 175 162 140 502000 238 24 20 490
  360 590 295 432 175 162 140 522000 238 24 20 490
  380 645 290 458 183 168 144 567000 263 20 24 840
  380 645 300 458 183 168 144 610000 263 20 24 840
  380 645 310 458 183 168 144 658000 263 20 24 840
  390 660 300 468 183 168 144 624000 270 21 24 840
  390 660 310 468 183 168 144 671000 270 21 24 840
  390 660 320 468 183 168 144 718000 270 21 24 840
  400 680 315 480 183 168 144 670000 263 21 24 840
  400 680 320 480 183 168 144 695000 263 21 24 840
  400 680 330 480 183 168 144 744000 263 21 24 840
  420 690 330 504 203 188 164 780000 251 24 24 840
  420 690 340 504 203 188 164 840000 251 24 24 840
  420 690 350 504 203 188 164 900000 251 24 24 840
  440 750 340 527 217 202 177 806000 223 24 24 840
  440 750 350 527 217 202 177 860000 223 24 24 840
  440 750 360 527 217 202 177 917000 223 24 24 840
  460 770 360 547 217 202 177 1000000 248 28 24 840
  460 770 370 547 217 202 177 1070000 248 28 24 840
  460 770 380 547 217 202 177 1400000 248 28 24 840
  480 800 380 570 228 213 188 1170000 240 30 24 840
  480 800 390 570 228 213 188 1240000 240 30 24 840
  480 800 400 570 228 213 188 1310000 240 30 24 840
  500 850 400 590 230 213 188 1312000 242 24 27 1250
  500 850 410 590 230 213 188 1380000 242 24 27 1250
  500 850 420 590 230 213 188 1455000 242 24 27 1250
CAD d D dw d1 L L1 L3 T P nSc DG TA
  inch inch inch inch inch inch inch ft-lbs psi pcs. mm ft-lbs
  8.661 14.567 6.299 10.630 4.488 4.094 3.465 70068 35996 15 M16 185
  8.661 14.567 6.496 10.630 4.488 4.094 3.465 75231 35996 15 M16 185
  8.661 14.567 6.693 10.630 4.488 4.094 3.465 81132 35996 15 M16 185
  9.449 15.945 7.087 11.614 4.803 4.291 3.622 101784 39479 12 M20 361
  9.449 15.945 6.693 11.614 4.803 4.291 3.622 88507 39479 12 M20 361
  9.449 15.945 7.480 11.614 4.803 4.291 3.622 115060 39479 12 M20 361
  10.236 16.929 8.268 12.638 5.236 4.724 4.055 151200 38028 14 M20 361
  10.236 16.929 7.874 12.638 5.236 4.724 4.055 135711 38028 14 M20 361
  10.236 16.929 7.480 12.638 5.236 4.724 4.055 120960 38028 14 M20 361
  11.024 18.110 8.268 13.622 5.787 5.276 4.488 160051 36431 16 M20 361
  11.024 18.110 8.661 13.622 5.787 5.276 4.488 179965 36431 16 M20 361
  11.024 18.110 9.055 13.622 5.787 5.276 4.488 199142 36431 16 M20 361
  11.811 19.094 9.646 14.331 6.102 5.591 4.803 232332 35706 18 M20 361
  11.811 19.094 9.449 14.331 6.102 5.591 4.803 217581 35706 18 M20 361
  11.811 19.094 9.055 14.331 6.102 5.591 4.803 202830 35706 18 M20 361
  12.598 20.472 9.449 15.197 6.102 5.591 4.803 230119 37302 20 M20 361
  12.598 20.472 9.843 15.197 6.102 5.591 4.803 250771 37302 20 M20 361
  12.598 20.472 10.236 15.197 6.102 5.591 4.803 275848 37302 20 M20 361
  13.386 22.441 9.843 16.063 6.654 6.142 5.276 287649 38318 24 M20 361
  13.386 22.441 10.236 16.063 6.654 6.142 5.276 311620 38318 24 M20 361
  13.386 22.441 10.630 16.063 6.654 6.142 5.276 339279 38318 24 M20 361
  13.780 22.835 10.630 17.008 6.890 6.378 5.512 326002 35561 24 M20 361
  13.780 22.835 11.024 17.008 6.890 6.378 5.512 354030 35561 24 M20 361
  13.780 22.835 11.220 17.008 6.890 6.378 5.512 368781 35561 24 M20 361
  14.173 23.228 11.024 17.008 6.890 6.378 5.512 341491 34545 24 M20 361
  14.173 23.228 11.614 17.008 6.890 6.378 5.512 385007 34545 24 M20 361
  14.173 23.228 11.417 17.008 6.890 6.378 5.512 370256 34545 24 M20 361
  14.961 25.394 11.417 18.031 7.205 6.614 5.669 418198 38173 20 M24 620
  14.961 25.394 11.811 18.031 7.205 6.614 5.669 449913 38173 20 M24 620
  14.961 25.394 12.205 18.031 7.205 6.614 5.669 485316 38173 20 M24 620
  15.354 25.984 11.811 18.425 7.205 6.614 5.669 460239 39189 21 M24 620
  15.354 25.984 12.205 18.425 7.205 6.614 5.669 494904 39189 21 M24 620
  15.354 25.984 12.598 18.425 7.205 6.614 5.669 529570 39189 21 M24 620
  15.748 26.772 12.402 18.898 7.205 6.614 5.669 494167 38173 21 M24 620
  15.748 26.772 12.598 18.898 7.205 6.614 5.669 512606 38173 21 M24 620
  15.748 26.772 12.992 18.898 7.205 6.614 5.669 548746 38173 21 M24 620
  16.535 27.165 12.992 19.843 7.992 7.402 6.457 575298 36431 24 M24 620
  16.535 27.165 13.386 19.843 7.992 7.402 6.457 619552 36431 24 M24 620
  16.535 27.165 13.780 19.843 7.992 7.402 6.457 663806 36431 24 M24 620
  17.323 29.528 13.386 20.748 8.543 7.953 6.969 594475 32367 24 M24 620
  17.323 29.528 13.780 20.748 8.543 7.953 6.969 634303 32367 24 M24 620
  17.323 29.528 14.173 20.748 8.543 7.953 6.969 676344 32367 24 M24 620
  18.110 30.315 14.173 21.535 8.543 7.953 6.969 737562 35996 28 M24 620
  18.110 30.315 14.567 21.535 8.543 7.953 6.969 789191 35996 28 M24 620
  18.110 30.315 14.961 21.535 8.543 7.953 6.969 1032587 35996 28 M24 620
  18.898 31.496 14.961 22.441 8.976 8.386 7.402 862948 34835 30 M24 620
  18.898 31.496 15.354 22.441 8.976 8.386 7.402 914577 34835 30 M24 620
  18.898 31.496 15.748 22.441 8.976 8.386 7.402 966206 34835 30 M24 620
  19.685 33.465 15.748 23.228 9.055 8.386 7.402 967681 35125 24 M27 920
  19.685 33.465 16.142 23.228 9.055 8.386 7.402 1017836 35125 24 M27 920
  19.685 33.465 16.535 23.228 9.055 8.386 7.402 1073153 35125 24 M27 920

Characteristics

Shrink discs are the modern method for creating a mechanical shrink fit. The shrink disc consists of either one or two thrust rings with tapered bores and a mating tapered inner ring. By tightening locking screws the thrust rings are drawn together compressing the inner ring and applying pressure to the outside of the hub clamping it to the shaft. Being positioned around the hub there is only one interface transmitting the loads giving the shrink disc method distinct advantages such as offering the possibility of very concentric and well balanced connections that are suited to high speed applications. Traditional shrink fits require complicated calculations, close machining tolerances and fine surface finishes, they also need considerable effort with mounting and removal. The shrink disc connection has none of these disadvantages and is better than any of the other usual connection methods with regard to fatigue strength under alternating torsional stress.

  • Unlimited range of applications – RINGFEDER® Shrink Disc connections are suitable for securing all types of hubs onto shafts and axles. Replacing traditional shrink fits, keys and polygon connections, splined shafts etc. So cog wheels and sprockets, levers, lifters, cam discs, pulleys or brake discs, balance wheels, couplings, slip on gear mechanisms, flanges, pulley wheels and rotors can be attached absolutely reliable.
  • Standard series – this is the most popular shrink disc. High transmission values are possible and by varying the screw tightening torque the Shrink Disc can be adapted to the design specification.
  • Compensation of small tolerance errorsplease contact our engineers.
  • Maximum reliability – suitable for static, dynamic and impact loads.
  • Slitted inner ring – low forces and pressures on hub and shaft.
  • Simplified manufacture – only plain shaft and bore diameters with easily achieved surface finish and tolerances are required.
  • Easy replacement – The RINGFEDER® shrink disc is free from any form fit.
  • Easy mounting – no steps, keyways, splines are required, therefore hubs can be located and locked at any point or angle on the shaft. RINGFEDER® Shrink Discs use standard screws tightened with standard tools. No additional machining or fitting work is required.
  • Easy removal – after loosening the locking screws, the RINGFEDER® Shrink Disc will self release and the hub will move freely on the shaft.
  • Low susceptibility to contamination – when the locking screws are tightened the functional contact surfaces are pressed firmly together and prevent the ingress of dirt and moisture.

Shrink discs GT (split)

In the application shown special screws according to the dimension X are required, which have to be ordered accordingly. When dimension „X“ larger than 2 · L1 (RfN 4071 Standard Series) is chosen, a reduction of the transmissible torque up to 50% has to be considered to the type GT.

Surface finishes

For shaft diameter dw: Peak-to-valley height Ra ≤ 3,2 μm.

Tolerances

For shaft see table at right

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