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Shrink Disc RfN 4091-SR Heavy Duty Series half

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

RINGFEDER® RfN 4091

CAD data download is available after login.
metric inch
CAD d D dw d1 LB T nSc DG TA
  mm mm mm mm mm Nm Stück mm Nm
  50 95 38 73 23 900 7 8 25
  50 95 40 73 23 1050 7 8 25
  50 95 42 73 23 1200 7 8 25
  55 105 42 78 23 1125 7 8 28
  55 105 45 78 23 1350 7 8 28
  55 105 48 78 23 1600 7 8 28
  62 115 48 85 23 1475 7 8 30
  62 115 50 85 23 1700 7 8 30
  62 115 52 85 23 1800 7 8 30
  68 118 50 93 27 1800 8 8 30
  68 118 55 93 27 2300 8 8 30
  68 118 60 93 27 2850 8 8 30
  75 145 55 105 27 2150 7 10 59
  75 145 60 105 27 2850 7 10 59
  75 145 65 105 27 3500 7 10 59
  80 145 60 105 27 2850 7 10 59
  80 145 65 105 27 3500 7 10 59
  80 145 70 105 27 4200 7 10 59
  90 160 65 116 29 3350 8 10 59
  90 160 70 116 29 4050 8 10 59
  90 160 75 116 29 4800 8 10 59
  100 170 70 126 32 4400 10 10 59
  100 170 75 126 32 5000 10 10 59
  100 170 80 126 32 6100 10 10 59
  110 185 75 138 35 5500 12 10 59
  110 185 80 138 35 6450 12 10 59
  110 185 85 138 35 7350 12 10 59
  125 215 85 160 37,5 7500 10 12 100
  125 215 90 160 37,5 8750 10 12 100
  125 215 95 160 37,5 10000 10 12 100
  135 212 90 172 45 9400 12 12 100
  135 212 95 172 45 10800 12 12 100
  135 212 105 172 45 13900 12 12 100
  140 300 90 220 54 18350 12 16 250
  140 300 100 220 54 23500 12 16 250
  140 300 110 220 54 29350 12 16 250
  155 263 105 198 45 13500 15 12 100
  155 263 110 198 45 15500 15 12 100
  155 263 115 198 45 17000 15 12 100
  165 290 115 210 49 20500 10 16 250
  165 290 120 210 49 23000 10 16 250
  165 290 125 210 49 25350 10 16 250
  175 300 125 220 59 36400 15 16 250
  175 300 130 220 59 39950 15 16 250
  175 300 135 220 59 43650 15 16 250
  185 330 135 236 61 36000 14 16 250
  185 330 140 236 61 39000 14 16 250
  185 330 145 236 61 43000 14 16 250
  190 350 135 239 62 47550 12 20 470
  190 350 140 239 62 51700 12 20 470
  190 350 155 239 62 65300 12 20 470
  195 350 140 246 63,5 37500 14 16 250
  195 350 150 246 63,5 44000 14 16 250
  195 350 155 246 63,5 48000 14 16 250
  200 350 145 246 63,5 42500 15 16 250
  200 350 150 246 63,5 46250 15 16 250
  200 350 155 246 63,5 50000 15 16 250
  220 370 160 270 74,5 63500 20 16 250
  220 370 165 270 74,5 68000 20 16 250
  220 370 170 270 74,5 73250 20 16 250
  240 405 170 295 79,5 77500 15 20 490
  240 405 180 295 79,5 88000 15 20 490
  240 405 190 295 79,5 99000 15 20 490
  260 430 190 321 87,5 106500 18 20 490
  260 430 200 321 87,5 120000 18 20 490
  260 430 210 321 87,5 134000 18 20 490
  280 460 210 346 96 142500 21 20 490
  280 460 220 346 96 160000 21 20 490
  280 460 230 346 96 177500 21 20 490
  300 485 230 364 98 170500 22 20 490
  300 485 240 364 98 188000 22 20 490
  300 485 245 364 98 197000 22 20 490
  320 520 240 386 102 189000 24 20 490
  320 520 250 386 102 207500 24 20 490
  320 520 260 386 102 225500 24 20 490
  340 570 250 420 110 244750 21 24 840
  340 570 260 420 110 265000 21 24 840
  340 570 270 420 110 289000 21 24 840
  350 580 270 425 110 278000 21 24 840
  350 580 280 425 110 302000 21 24 840
  350 580 285 425 110 314500 21 24 840
  360 590 280 432 114,5 306000 22 24 840
  360 590 290 432 114,5 331500 22 24 840
  360 590 295 432 114,5 344500 22 24 840
  380 645 290 458 114,5 309000 22 24 840
  380 645 300 458 114,5 334000 22 24 840
  380 645 310 458 114,5 359500 22 24 840
  390 660 300 468 118,5 354000 24 24 840
  390 660 310 468 118,5 381000 24 24 840
  390 660 320 468 118,5 407250 24 24 840
  400 680 315 480 118,5 382500 24 24 840
  400 680 320 480 118,5 394000 24 24 840
  400 680 330 480 118,5 422500 24 24 840
  420 690 330 504 131,5 499500 30 24 840
  420 690 340 504 131,5 534000 30 24 840
  420 690 350 504 131,5 570000 30 24 840
  440 750 340 527 138,5 529000 24 27 1250
  440 750 350 527 138,5 565000 24 27 1250
  440 750 360 527 138,5 602000 24 27 1250
  460 770 360 547 141 660000 28 27 1250
  460 770 370 547 141 710000 28 27 1250
  460 770 380 547 141 750000 28 27 1250
  480 800 380 580 152 767500 30 27 1250
  480 800 390 580 152 813000 30 27 1250
  480 800 400 580 152 860000 30 27 1250
  500 850 400 600 152 875000 32 27 1250
  500 850 410 600 152 920000 32 27 1250
  500 850 420 600 152 970000 32 27 1250
CAD d D dw d1 LB T nSc DG TA
  inch inch inch inch inch ft-lbs pcs. mm ft-lbs
  1.969 3.740 1.575 2.874 0.906 774 7 M8 18
  1.969 3.740 1.654 2.874 0.906 885 7 M8 18
  1.969 3.740 1.496 2.874 0.906 664 7 M8 18
  2.165 4.134 1.654 3.071 0.906 830 7 M8 21
  2.165 4.134 1.772 3.071 0.906 996 7 M8 21
  2.165 4.134 1.890 3.071 0.906 1180 7 M8 21
  2.441 4.528 1.890 3.346 0.906 1088 7 M8 22
  2.441 4.528 1.969 3.346 0.906 1254 7 M8 22
  2.441 4.528 2.047 3.346 0.906 1328 7 M8 22
  2.677 4.646 1.969 3.661 1.063 1328 8 M8 22
  2.677 4.646 2.165 3.661 1.063 1696 8 M8 22
  2.677 4.646 2.362 3.661 1.063 2102 8 M8 22
  2.953 5.709 2.165 4.134 1.063 1586 7 M10 45
  2.953 5.709 2.362 4.134 1.063 2102 7 M10 45
  2.953 5.709 2.559 4.134 1.063 2581 7 M10 45
  3.150 5.709 2.362 4.134 1.063 2102 7 M10 45
  3.150 5.709 2.559 4.134 1.063 2581 7 M10 45
  3.150 5.709 2.756 4.134 1.063 3098 7 M10 45
  3.543 6.299 2.559 4.567 1.142 2471 8 M10 45
  3.543 6.299 2.756 4.567 1.142 2987 8 M10 45
  3.543 6.299 2.953 4.567 1.142 3540 8 M10 45
  3.937 6.693 2.756 4.961 1.260 3245 10 M10 45
  3.937 6.693 2.953 4.961 1.260 3688 10 M10 45
  3.937 6.693 3.150 4.961 1.260 4499 10 M10 45
  4.331 7.283 2.953 5.433 1.378 4057 12 M10 45
  4.331 7.283 3.150 5.433 1.378 4757 12 M10 45
  4.331 7.283 3.346 5.433 1.378 5421 12 M10 45
  4.921 8.465 3.543 6.299 1.476 6454 10 M12 75
  4.921 8.465 3.740 6.299 1.476 7376 10 M12 75
  4.921 8.465 3.346 6.299 1.476 5532 10 M12 75
  5.315 8.346 3.543 6.772 1.772 6933 12 M12 75
  5.315 8.346 3.740 6.772 1.772 7966 12 M12 75
  5.315 8.346 4.134 6.772 1.772 10252 12 M12 75
  5.512 11.811 3.543 8.661 2.126 13534 12 M16 185
  5.512 11.811 3.937 8.661 2.126 17333 12 M16 185
  5.512 11.811 4.331 8.661 2.126 21647 12 M16 185
  6.102 10.354 4.134 7.795 1.772 9957 15 M12 75
  6.102 10.354 4.331 7.795 1.772 11432 15 M12 75
  6.102 10.354 4.528 7.795 1.772 12539 15 M12 75
  6.496 11.417 4.528 8.268 1.929 15120 10 M16 185
  6.496 11.417 4.724 8.268 1.929 16964 10 M16 185
  6.496 11.417 4.921 8.268 1.929 18697 10 M16 185
  6.890 11.811 4.921 8.661 2.323 26847 15 M16 185
  6.890 11.811 5.118 8.661 2.323 29466 15 M16 185
  6.890 11.811 5.315 8.661 2.323 32195 15 M16 185
  7.283 12.992 5.315 9.291 2.402 26552 14 M16 185
  7.283 12.992 5.512 9.291 2.402 28765 14 M16 185
  7.283 12.992 5.709 9.291 2.402 31715 14 M16 185
  7.480 13.780 5.315 9.409 2.441 35071 12 M20 350
  7.480 13.780 5.512 9.409 2.441 38132 12 M20 350
  7.480 13.780 6.102 9.409 2.441 48163 12 M20 350
  7.677 13.780 5.512 9.685 2.500 27659 14 M16 185
  7.677 13.780 5.906 9.685 2.500 32453 14 M16 185
  7.677 13.780 6.102 9.685 2.500 35403 14 M16 185
  7.874 13.780 5.906 9.685 2.500 34112 15 M16 185
  7.874 13.780 6.102 9.685 2.500 36878 15 M16 185
  7.874 13.780 5.709 9.685 2.500 31346 15 M16 185
  8.661 14.567 6.299 10.630 2.933 46835 20 M16 185
  8.661 14.567 6.496 10.630 2.933 50154 20 M16 185
  8.661 14.567 6.693 10.630 2.933 54026 20 M16 185
  9.449 15.945 6.693 11.614 3.130 57161 15 M20 361
  9.449 15.945 7.087 11.614 3.130 64905 15 M20 361
  9.449 15.945 7.480 11.614 3.130 73019 15 M20 361
  10.236 16.929 7.480 12.638 3.445 78550 18 M20 361
  10.236 16.929 7.874 12.638 3.445 88507 18 M20 361
  10.236 16.929 8.268 12.638 3.445 98833 18 M20 361
  11.024 18.110 8.268 13.622 3.780 105103 21 M20 361
  11.024 18.110 8.661 13.622 3.780 118010 21 M20 361
  11.024 18.110 9.055 13.622 3.780 130917 21 M20 361
  11.811 19.094 9.055 14.331 3.858 125754 22 M20 361
  11.811 19.094 9.449 14.331 3.858 138662 22 M20 361
  11.811 19.094 9.646 14.331 3.858 145300 22 M20 361
  12.598 20.472 9.449 15.197 4.016 139399 24 M20 361
  12.598 20.472 9.843 15.197 4.016 153044 24 M20 361
  12.598 20.472 10.236 15.197 4.016 166320 24 M20 361
  13.386 22.441 9.843 16.535 4.331 180518 21 M24 620
  13.386 22.441 10.236 16.535 4.331 195454 21 M24 620
  13.386 22.441 10.630 16.535 4.331 213155 21 M24 620
  13.780 22.835 10.630 16.732 4.331 205042 21 M24 620
  13.780 22.835 11.024 16.732 4.331 222744 21 M24 620
  13.780 22.835 11.220 16.732 4.331 231963 21 M24 620
  14.173 23.228 11.417 17.008 4.508 244502 22 M24 620
  14.173 23.228 11.614 17.008 4.508 254090 22 M24 620
  14.173 23.228 11.024 17.008 4.508 225694 22 M24 620
  14.961 25.394 11.417 18.031 4.508 227907 22 M24 620
  14.961 25.394 11.811 18.031 4.508 246346 22 M24 620
  14.961 25.394 12.205 18.031 4.508 265154 22 M24 620
  15.354 25.984 11.811 18.425 4.665 261097 24 M24 620
  15.354 25.984 12.205 18.425 4.665 281011 24 M24 620
  15.354 25.984 12.598 18.425 4.665 300372 24 M24 620
  15.748 26.772 12.402 18.898 4.665 282117 24 M24 620
  15.748 26.772 12.598 18.898 4.665 290599 24 M24 620
  15.748 26.772 12.992 18.898 4.665 311620 24 M24 620
  16.535 27.165 12.992 19.843 5.177 368412 30 M24 620
  16.535 27.165 13.386 19.843 5.177 393858 30 M24 620
  16.535 27.165 13.780 19.843 5.177 420410 30 M24 620
  17.323 29.528 13.386 20.748 5.453 390170 24 M27 920
  17.323 29.528 13.780 20.748 5.453 416723 24 M27 920
  17.323 29.528 14.173 20.748 5.453 444012 24 M27 920
  18.110 30.315 14.173 21.535 5.551 486791 28 M27 920
  18.110 30.315 14.567 21.535 5.551 523669 28 M27 920
  18.110 30.315 14.961 21.535 5.551 553172 28 M27 920
  18.898 31.496 14.961 22.835 5.984 566079 30 M27 920
  18.898 31.496 15.354 22.835 5.984 599638 30 M27 920
  18.898 31.496 15.748 22.835 5.984 634303 30 M27 920
  19.685 33.465 15.748 23.622 5.984 645367 32 M27 920
  19.685 33.465 16.142 23.622 5.984 678557 32 M27 920
  19.685 33.465 16.535 23.622 5.984 715435 32 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.

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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