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Shrink Disc RfN 4051-SR Light Duty Series half

Reduced dimensions with lower transmission values – especially for applications with restricted space.
As a split version, the SR series is able to offer greater mounting versatility on symmetrical hub designs or can also be used as half shrink discs for lower torque applications.

RINGFEDER® RfN 4051

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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
  125 185 95 158 30,5 5275 8 10 59
  125 185 100 158 30,5 6050 8 10 59
  125 185 105 158 30,5 6900 8 10 59
  140 220 110 175 30,85 7400 9 10 59
  140 220 120 175 30,85 9320 9 10 59
  140 220 125 175 30,85 10250 9 10 59
  155 245 130 192 30,5 12000 11 10 59
  155 245 135 192 30,5 13200 11 10 59
  155 245 140 192 30,5 14500 11 10 59
  165 260 135 210 36 16000 10 12 100
  165 260 140 210 36 17600 10 12 100
  165 260 145 210 36 19250 10 12 100
  175 275 145 220 36 19500 11 12 100
  175 275 150 220 36 21200 11 12 100
  175 275 155 220 36 23000 11 12 100
  185 295 155 225 36 23300 12 12 100
  185 295 160 225 36 25150 12 12 100
  185 295 165 225 36 27000 12 12 100
  195 315 165 237 41 31500 15 12 100
  195 315 170 237 41 33850 15 12 100
  195 315 175 237 41 36250 15 12 100
  200 330 175 242 41 37000 16 12 100
  200 330 180 242 41 39750 16 12 100
  200 330 185 242 41 42250 16 12 100
  220 345 180 265 47 41400 10 16 250
  220 345 190 265 47 46750 10 16 250
  220 345 200 265 47 52500 10 16 250
  240 370 200 290 47 56500 12 16 250
  240 370 210 290 47 63750 12 16 250
  240 370 215 290 47 67250 12 16 250
  260 395 220 310 52,5 74500 14 16 250
  260 395 230 310 52,5 82500 14 16 250
  260 395 235 310 52,5 86500 14 16 250
  280 425 230 333 59,5 85500 16 16 250
  280 425 240 333 59,5 94500 16 16 250
  280 425 250 333 59,5 104000 16 16 250
  300 460 250 358 59,5 107500 18 16 250
  300 460 260 358 59,5 117000 18 16 250
  300 460 270 358 59,5 127500 18 16 250
  320 495 270 378 60,5 130000 20 16 250
  320 495 280 378 60,5 142000 20 16 250
  320 495 290 378 60,5 153000 20 16 250
  340 535 290 402 60,5 150000 21 16 250
  340 535 300 402 60,5 162000 21 16 250
  340 535 305 402 60,5 168500 21 16 250
  350 545 300 413 68,5 186000 16 20 490
  350 545 305 413 68,5 192500 16 20 490
  350 545 310 413 68,5 200000 16 20 490
  360 555 300 423 68,5 180000 16 20 490
  360 555 310 423 68,5 194000 16 20 490
  360 555 320 423 68,5 207500 16 20 490
  380 585 320 442 75,5 217500 18 20 490
  380 585 325 442 75,5 225500 18 20 490
  380 585 330 442 75,5 233500 18 20 490
  390 595 330 452 78 252500 20 20 490
  390 595 340 452 78 270000 20 20 490
  390 595 350 452 78 288500 20 20 490
  400 615 340 462 78 275000 21 20 490
  400 615 350 462 78 293500 21 20 490
  400 615 360 462 78 313000 21 20 490
  420 630 350 485 82 289000 22 20 490
  420 630 360 485 82 308500 22 20 490
  420 630 370 485 82 327500 22 20 490
  440 660 370 505 82 338500 24 20 490
  440 660 380 505 82 359500 24 20 490
  440 660 390 505 82 381000 24 20 490
  460 685 390 527 91,5 420000 28 20 490
  460 685 400 527 91,5 445000 28 20 490
  460 685 410 527 91,5 467500 28 20 490
  480 715 410 547 91,5 445500 28 20 490
  480 715 420 547 91,5 470500 28 20 490
  480 715 425 547 91,5 483000 28 20 490
  500 750 425 567 91,5 493000 30 20 490
  500 750 430 567 91,5 506500 30 20 490
  500 750 440 567 91,5 533000 30 20 490
CAD d D dw d1 LB T nSc DG TA
  inch inch inch inch inch ft-lbs pcs. mm ft-lbs
  4.921 7.283 3.740 6.220 1.201 3891 8 M10 45
  4.921 7.283 3.937 6.220 1.201 4462 8 M10 45
  4.921 7.283 4.134 6.220 1.201 5089 8 M10 45
  5.512 8.661 4.331 6.890 1.215 5458 9 M10 45
  5.512 8.661 4.724 6.890 1.215 6874 9 M10 45
  5.512 8.661 4.921 6.890 1.215 7560 9 M10 45
  6.102 9.646 5.118 7.559 1.201 8851 11 M10 45
  6.102 9.646 5.315 7.559 1.201 9736 11 M10 45
  6.102 9.646 5.512 7.559 1.201 10695 11 M10 45
  6.496 10.236 5.315 8.268 1.417 11801 10 M12 75
  6.496 10.236 5.512 8.268 1.417 12981 10 M12 75
  6.496 10.236 5.709 8.268 1.417 14198 10 M12 75
  6.890 10.827 5.709 8.661 1.417 14382 11 M12 75
  6.890 10.827 5.906 8.661 1.417 15636 11 M12 75
  6.890 10.827 6.102 8.661 1.417 16964 11 M12 75
  7.283 11.614 6.102 8.858 1.417 17185 12 M12 75
  7.283 11.614 6.299 8.858 1.417 18550 12 M12 75
  7.283 11.614 6.496 8.858 1.417 19914 12 M12 75
  7.677 12.402 6.496 9.331 1.614 23233 15 M12 75
  7.677 12.402 6.693 9.331 1.614 24966 15 M12 75
  7.677 12.402 6.890 9.331 1.614 26737 15 M12 75
  7.874 12.992 6.890 9.528 1.614 27290 16 M12 75
  7.874 12.992 7.087 9.528 1.614 29318 16 M12 75
  7.874 12.992 7.283 9.528 1.614 31162 16 M12 75
  8.661 13.583 7.087 10.433 1.850 30535 10 M16 185
  8.661 13.583 7.480 10.433 1.850 34481 10 M16 185
  8.661 13.583 7.874 10.433 1.850 38722 10 M16 185
  9.449 14.567 7.874 11.417 1.850 41672 12 M16 185
  9.449 14.567 8.268 11.417 1.850 47020 12 M16 185
  9.449 14.567 8.465 11.417 1.850 49601 12 M16 185
  10.236 15.551 8.661 12.205 2.067 54948 14 M16 185
  10.236 15.551 9.055 12.205 2.067 60849 14 M16 185
  10.236 15.551 9.252 12.205 2.067 63799 14 M16 185
  11.024 16.732 9.055 13.110 2.343 63062 16 M16 185
  11.024 16.732 9.449 13.110 2.343 69700 16 M16 185
  11.024 16.732 9.843 13.110 2.343 76706 16 M16 185
  11.811 18.110 9.843 14.094 2.343 79288 18 M16 185
  11.811 18.110 10.236 14.094 2.343 86295 18 M16 185
  11.811 18.110 10.630 14.094 2.343 94039 18 M16 185
  12.598 19.488 10.630 14.882 2.382 95883 20 M16 185
  12.598 19.488 11.024 14.882 2.382 104734 20 M16 185
  12.598 19.488 11.417 14.882 2.382 112847 20 M16 185
  13.386 21.063 11.417 15.827 2.382 110634 21 M16 185
  13.386 21.063 11.811 15.827 2.382 119485 21 M16 185
  13.386 21.063 12.008 15.827 2.382 124279 21 M16 185
  13.780 21.457 11.811 16.260 2.697 137187 16 M20 361
  13.780 21.457 12.008 16.260 2.697 141981 16 M20 361
  13.780 21.457 12.205 16.260 2.697 147512 16 M20 361
  14.173 21.850 11.811 16.654 2.697 132761 16 M20 361
  14.173 21.850 12.205 16.654 2.697 143087 16 M20 361
  14.173 21.850 12.598 16.654 2.697 153044 16 M20 361
  14.961 23.031 12.598 17.402 2.972 160420 18 M20 361
  14.961 23.031 12.795 17.402 2.972 166320 18 M20 361
  14.961 23.031 12.992 17.402 2.972 172221 18 M20 361
  15.354 23.425 12.992 17.795 3.071 186234 20 M20 361
  15.354 23.425 13.386 17.795 3.071 199142 20 M20 361
  15.354 23.425 13.780 17.795 3.071 212787 20 M20 361
  15.748 24.213 13.386 18.189 3.071 202830 21 M20 361
  15.748 24.213 13.780 18.189 3.071 216474 21 M20 361
  15.748 24.213 14.173 18.189 3.071 230857 21 M20 361
  16.535 24.803 13.780 19.094 3.228 213155 22 M20 361
  16.535 24.803 14.173 19.094 3.228 227538 22 M20 361
  16.535 24.803 14.567 19.094 3.228 241552 22 M20 361
  17.323 25.984 14.567 19.882 3.228 249665 24 M20 361
  17.323 25.984 14.961 19.882 3.228 265154 24 M20 361
  17.323 25.984 15.354 19.882 3.228 281011 24 M20 361
  18.110 26.969 15.354 20.748 3.602 309776 28 M20 361
  18.110 26.969 15.748 20.748 3.602 328215 28 M20 361
  18.110 26.969 16.142 20.748 3.602 344810 28 M20 361
  18.898 28.150 16.142 21.535 3.602 328584 28 M20 361
  18.898 28.150 16.535 21.535 3.602 347023 28 M20 361
  18.898 28.150 16.732 21.535 3.602 356242 28 M20 361
  19.685 29.528 16.732 22.323 3.602 363618 30 M20 361
  19.685 29.528 16.929 22.323 3.602 373575 30 M20 361
  19.685 29.528 17.323 22.323 3.602 393121 30 M20 361

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.

  • Light design – suitable for middle transmissible values when space is limited.
  • 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 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 replacement – the RINGFEDER® shrink disc is free from any form fit.
  • 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.

Surface finishes

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

Tolerances

For shaft h9

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