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Shrink Disc RfN 4071-SR Standard Series half

Split design medium duty version can also be used as half shrink discs.

RINGFEDER® RfN 4071

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metric inch
CAD d D dw d1 LB T nSc DG TA
  mm mm mm mm mm Nm Stück mm Nm
  220 370 160 270 59,5 47500 15 16 250
  220 370 165 270 59,5 51000 15 16 250
  220 370 170 270 59,5 55000 15 16 250
  240 405 170 295 62 60000 12 20 490
  240 405 180 295 62 69000 12 20 490
  240 405 190 295 62 78000 12 20 490
  260 430 190 321 67,5 82000 14 20 490
  260 430 200 321 67,5 92000 14 20 490
  260 430 210 321 67,5 102500 14 20 490
  280 460 210 346 76,5 108500 16 20 490
  280 460 220 346 76,5 122000 16 20 490
  280 460 230 346 76,5 135000 16 20 490
  300 485 230 364 79,5 137500 18 20 490
  300 485 240 364 79,5 147500 18 20 490
  300 485 245 364 79,5 157500 18 20 490
  320 520 240 386 79,5 156000 20 20 490
  320 520 250 386 79,5 170000 20 20 490
  320 520 260 386 79,5 187000 20 20 490
  340 570 250 408 86,5 195000 24 20 490
  340 570 260 408 86,5 211250 24 20 490
  340 570 270 408 86,5 230000 24 20 490
  350 580 270 432 89,5 221000 24 20 490
  350 580 280 432 89,5 240000 24 20 490
  350 580 285 432 89,5 250000 24 20 490
  360 590 280 432 89,5 231500 24 20 490
  360 590 290 432 89,5 251000 24 20 490
  360 590 295 432 89,5 261000 24 20 490
  380 645 290 458 92,5 283500 20 24 840
  380 645 300 458 92,5 305000 20 24 840
  380 645 310 458 92,5 329000 20 24 840
  390 660 300 468 92,5 312000 21 24 840
  390 660 310 468 92,5 335500 21 24 840
  390 660 320 468 92,5 359000 21 24 840
  400 680 315 480 92,5 335000 21 24 840
  400 680 320 480 92,5 347500 21 24 840
  400 680 330 480 92,5 372000 21 24 840
  420 690 330 504 106,5 390000 24 24 840
  420 690 340 504 106,5 420000 24 24 840
  420 690 350 504 106,5 450000 24 24 840
  440 750 340 527 113,5 403000 24 24 840
  440 750 350 527 113,5 430000 24 24 840
  440 750 360 527 113,5 458500 24 24 840
  460 770 360 547 113,5 500000 28 24 840
  460 770 370 547 113,5 535000 28 24 840
  460 770 380 547 113,5 700000 28 24 840
  480 800 380 570 119 585000 30 24 840
  480 800 390 570 119 620000 30 24 840
  480 800 400 570 119 655000 30 24 840
  500 850 400 590 119 656000 24 27 1250
  500 850 410 590 119 690000 24 27 1250
  500 850 420 590 119 727500 24 27 1250
CAD d D dw d1 LB T nSc DG TA
  inch inch inch inch inch ft-lbs pcs. mm ft-lbs
  8.661 14.567 6.299 10.630 2.343 35034 15 M16 185
  8.661 14.567 6.496 10.630 2.343 37616 15 M16 185
  8.661 14.567 6.693 10.630 2.343 40566 15 M16 185
  9.449 15.945 7.087 11.614 2.441 50892 12 M20 361
  9.449 15.945 6.693 11.614 2.441 44254 12 M20 361
  9.449 15.945 7.480 11.614 2.441 57530 12 M20 361
  10.236 16.929 8.268 12.638 2.657 75600 14 M20 361
  10.236 16.929 7.874 12.638 2.657 67856 14 M20 361
  10.236 16.929 7.480 12.638 2.657 60480 14 M20 361
  11.024 18.110 8.268 13.622 3.012 80025 16 M20 361
  11.024 18.110 8.661 13.622 3.012 89983 16 M20 361
  11.024 18.110 9.055 13.622 3.012 99571 16 M20 361
  11.811 19.094 9.646 14.331 3.130 116166 18 M20 361
  11.811 19.094 9.449 14.331 3.130 108790 18 M20 361
  11.811 19.094 9.055 14.331 3.130 101415 18 M20 361
  12.598 20.472 9.449 15.197 3.130 115060 20 M20 361
  12.598 20.472 9.843 15.197 3.130 125386 20 M20 361
  12.598 20.472 10.236 15.197 3.130 137924 20 M20 361
  13.386 22.441 9.843 16.063 3.406 143825 24 M20 361
  13.386 22.441 10.236 16.063 3.406 155810 24 M20 361
  13.386 22.441 10.630 16.063 3.406 169639 24 M20 361
  13.780 22.835 10.630 17.008 3.524 163001 24 M20 361
  13.780 22.835 11.024 17.008 3.524 177015 24 M20 361
  13.780 22.835 11.220 17.008 3.524 184391 24 M20 361
  14.173 23.228 11.024 17.008 3.524 170746 24 M20 361
  14.173 23.228 11.614 17.008 3.524 192504 24 M20 361
  14.173 23.228 11.417 17.008 3.524 185128 24 M20 361
  14.961 25.394 11.417 18.031 3.642 209099 20 M24 620
  14.961 25.394 11.811 18.031 3.642 224956 20 M24 620
  14.961 25.394 12.205 18.031 3.642 242658 20 M24 620
  15.354 25.984 11.811 18.425 3.642 230119 21 M24 620
  15.354 25.984 12.205 18.425 3.642 247452 21 M24 620
  15.354 25.984 12.598 18.425 3.642 264785 21 M24 620
  15.748 26.772 12.402 18.898 3.642 247083 21 M24 620
  15.748 26.772 12.598 18.898 3.642 256303 21 M24 620
  15.748 26.772 12.992 18.898 3.642 274373 21 M24 620
  16.535 27.165 12.992 19.843 4.193 287649 24 M24 620
  16.535 27.165 13.386 19.843 4.193 309776 24 M24 620
  16.535 27.165 13.780 19.843 4.193 331903 24 M24 620
  17.323 29.528 13.386 20.748 4.469 297237 24 M24 620
  17.323 29.528 13.780 20.748 4.469 317152 24 M24 620
  17.323 29.528 14.173 20.748 4.469 338172 24 M24 620
  18.110 30.315 14.173 21.535 4.469 368781 28 M24 620
  18.110 30.315 14.567 21.535 4.469 394596 28 M24 620
  18.110 30.315 14.961 21.535 4.469 516293 28 M24 620
  18.898 31.496 14.961 22.441 4.685 431474 30 M24 620
  18.898 31.496 15.354 22.441 4.685 457288 30 M24 620
  18.898 31.496 15.748 22.441 4.685 483103 30 M24 620
  19.685 33.465 15.748 23.228 4.685 483841 24 M27 920
  19.685 33.465 16.142 23.228 4.685 508918 24 M27 920
  19.685 33.465 16.535 23.228 4.685 536576 24 M27 920

Half shrink discs

With half shrink discs HT/HC only 50% of stated T is transmitted.

  • Type HT (Threaded holes in thrust ring)
  • Type HC (Clearance holes in thrust ring)

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.

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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