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Shrink Disc RfN 4051 Light Duty Series/split

Reduced dimensions with lower transmission values – especially for applications with restricted space.
This light duty external locking device is the first in the Shrink Disc range and is useful for low to medium torque requirements.

RINGFEDER® RfN 4051

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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
  125 185 95 158 58 51 39 10550 191 8 10 59
  125 185 100 158 58 51 39 12100 191 8 10 59
  125 185 105 158 58 51 39 13800 191 8 10 59
  140 220 110 175 58 51 39 14800 192 9 10 59
  140 220 120 175 58 51 39 18640 192 9 10 59
  140 220 125 175 58 51 39 20500 192 9 10 59
  155 245 130 192 58 51 39 24000 212 11 10 59
  155 245 135 192 58 51 39 26400 212 11 10 59
  155 245 140 192 58 51 39 29000 212 11 10 59
  165 260 135 210 70 62 46 32000 224 10 12 100
  165 260 140 210 70 62 46 35200 224 10 12 100
  165 260 145 210 70 62 46 38500 224 10 12 100
  175 275 145 220 70 62 46 39000 232 11 12 100
  175 275 150 220 70 62 46 42400 232 11 12 100
  175 275 155 220 70 62 46 46000 232 11 12 100
  185 295 155 225 70 62 46 46600 240 12 12 100
  185 295 160 225 70 62 46 50300 240 12 12 100
  185 295 165 225 70 62 46 54000 240 12 12 100
  195 315 165 237 80 72 56 63000 233 15 12 100
  195 315 170 237 80 72 56 67700 233 15 12 100
  195 315 175 237 80 72 56 72500 233 15 12 100
  200 330 175 242 80 72 56 74000 243 16 12 100
  200 330 180 242 80 72 56 79500 243 16 12 100
  200 330 185 242 80 72 56 84500 243 16 12 100
  220 345 180 265 94 84 66 82800 220 10 16 250
  220 345 190 265 94 84 66 93500 220 10 16 250
  220 345 200 265 94 84 66 105000 220 10 16 250
  240 370 200 290 94 84 66 113000 243 12 16 250
  240 370 210 290 94 84 66 127500 243 12 16 250
  240 370 215 290 94 84 66 134500 243 12 16 250
  260 395 220 310 102 92 72 149000 240 14 16 250
  260 395 230 310 102 92 72 165000 240 14 16 250
  260 395 235 310 102 92 72 173000 240 14 16 250
  280 425 230 333 114 104 84 171000 218 16 16 250
  280 425 240 333 114 104 84 189000 218 16 16 250
  280 425 250 333 114 104 84 208000 218 16 16 250
  300 460 250 358 114 104 84 215000 229 18 16 250
  300 460 260 358 114 104 84 234000 229 18 16 250
  300 460 270 358 114 104 84 255000 229 18 16 250
  320 495 270 378 116 106 84 260000 239 20 16 250
  320 495 280 378 116 106 84 284000 239 20 16 250
  320 495 290 378 116 106 84 306000 239 20 16 250
  340 535 290 402 116 106 84 300000 236 21 16 250
  340 535 300 402 116 106 84 324000 236 21 16 250
  340 535 305 402 116 106 84 337000 236 21 16 250
  350 545 300 413 135 122 100 372000 230 16 20 490
  350 545 305 413 135 122 100 385000 230 16 20 490
  350 545 310 413 135 122 100 400000 230 16 20 490
  360 555 300 423 135 122 100 360000 223 16 20 490
  360 555 310 423 135 122 100 388000 223 16 20 490
  360 555 320 423 135 122 100 415000 223 16 20 490
  380 585 320 442 149 136 112 435000 213 18 20 490
  380 585 325 442 149 136 112 451000 213 18 20 490
  380 585 330 442 149 136 112 467000 213 18 20 490
  390 595 330 452 149 136 112 505000 230 20 20 490
  390 595 340 452 149 136 112 540000 230 20 20 490
  390 595 350 452 149 136 112 577000 230 20 20 490
  400 615 340 462 149 136 112 550000 236 21 20 490
  400 615 350 462 149 136 112 587000 236 21 20 490
  400 615 360 462 149 136 112 626000 236 21 20 490
  420 630 350 485 157 144 120 578000 219 22 20 490
  420 630 360 485 157 144 120 617000 219 22 20 490
  420 630 370 485 157 144 120 655000 219 22 20 490
  440 660 370 505 157 144 120 677000 229 24 20 490
  440 660 380 505 157 144 120 719000 229 24 20 490
  440 660 390 505 157 144 120 762000 229 24 20 490
  460 685 390 527 171 158 132 840000 232 28 20 490
  460 685 400 527 171 158 132 890000 232 28 20 490
  460 685 410 527 171 158 132 935000 232 28 20 490
  480 715 410 547 171 158 132 891000 222 28 20 490
  480 715 420 547 171 158 132 941000 222 28 20 490
  480 715 425 547 171 158 132 966000 222 28 20 490
  500 750 425 567 171 158 132 986000 228 30 20 490
  500 750 430 567 171 158 132 1013000 228 30 20 490
  500 750 440 567 171 158 132 1066000 228 30 20 490
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
  4.921 7.283 3.740 6.220 2.283 2.008 1.535 7781 27723 8 M10 45
  4.921 7.283 3.937 6.220 2.283 2.008 1.535 8925 27723 8 M10 45
  4.921 7.283 4.134 6.220 2.283 2.008 1.535 10178 27723 8 M10 45
  5.512 8.661 4.331 6.890 2.283 2.008 1.535 10916 27868 9 M10 45
  5.512 8.661 4.724 6.890 2.283 2.008 1.535 13748 27868 9 M10 45
  5.512 8.661 4.921 6.890 2.283 2.008 1.535 15120 27868 9 M10 45
  6.102 9.646 5.118 7.559 2.283 2.008 1.535 17702 30771 11 M10 45
  6.102 9.646 5.315 7.559 2.283 2.008 1.535 19472 30771 11 M10 45
  6.102 9.646 5.512 7.559 2.283 2.008 1.535 21390 30771 11 M10 45
  6.496 10.236 5.709 8.268 2.756 2.441 1.811 28396 32512 10 M12 75
  6.496 10.236 5.512 8.268 2.756 2.441 1.811 25962 32512 10 M12 75
  6.496 10.236 5.315 8.268 2.756 2.441 1.811 23602 32512 10 M12 75
  6.890 10.827 6.102 8.661 2.756 2.441 1.811 33928 33674 11 M12 75
  6.890 10.827 5.709 8.661 2.756 2.441 1.811 28765 33674 11 M12 75
  6.890 10.827 5.906 8.661 2.756 2.441 1.811 31273 33674 11 M12 75
  7.283 11.614 6.496 8.858 2.756 2.441 1.811 39829 34835 12 M12 75
  7.283 11.614 6.299 8.858 2.756 2.441 1.811 37100 34835 12 M12 75
  7.283 11.614 6.102 8.858 2.756 2.441 1.811 34371 34835 12 M12 75
  7.677 12.402 6.890 9.331 3.150 2.835 2.205 53474 33819 15 M12 75
  7.677 12.402 6.693 9.331 3.150 2.835 2.205 49933 33819 15 M12 75
  7.677 12.402 6.496 9.331 3.150 2.835 2.205 46467 33819 15 M12 75
  7.874 12.992 7.283 9.528 3.150 2.835 2.205 62325 35270 16 M12 75
  7.874 12.992 6.890 9.528 3.150 2.835 2.205 54580 35270 16 M12 75
  7.874 12.992 7.087 9.528 3.150 2.835 2.205 58637 35270 16 M12 75
  8.661 13.583 7.874 10.433 3.701 3.307 2.598 77445 31932 10 M16 185
  8.661 13.583 7.480 10.433 3.701 3.307 2.598 68963 31932 10 M16 185
  8.661 13.583 7.087 10.433 3.701 3.307 2.598 61071 31932 10 M16 185
  9.449 14.567 7.874 11.417 3.701 3.307 2.598 83345 35270 12 M16 185
  9.449 14.567 8.268 11.417 3.701 3.307 2.598 94040 35270 12 M16 185
  9.449 14.567 8.465 11.417 3.701 3.307 2.598 99203 35270 12 M16 185
  10.236 15.551 9.252 12.205 4.016 3.622 2.835 127600 34835 14 M16 185
  10.236 15.551 8.661 12.205 4.016 3.622 2.835 109898 34835 14 M16 185
  10.236 15.551 9.055 12.205 4.016 3.622 2.835 121699 34835 14 M16 185
  11.024 16.732 9.843 13.110 4.488 4.094 3.307 153415 31642 16 M16 185
  11.024 16.732 9.449 13.110 4.488 4.094 3.307 139401 31642 16 M16 185
  11.024 16.732 9.055 13.110 4.488 4.094 3.307 126124 31642 16 M16 185
  11.811 18.110 9.843 14.094 4.488 4.094 3.307 158578 33238 18 M16 185
  11.811 18.110 10.630 14.094 4.488 4.094 3.307 188080 33238 18 M16 185
  11.811 18.110 10.236 14.094 4.488 4.094 3.307 172591 33238 18 M16 185
  12.598 19.488 11.417 14.882 4.567 4.173 3.307 225696 34690 20 M16 185
  12.598 19.488 10.630 14.882 4.567 4.173 3.307 191768 34690 20 M16 185
  12.598 19.488 11.024 14.882 4.567 4.173 3.307 209470 34690 20 M16 185
  13.386 21.063 12.008 15.827 4.567 4.173 3.307 248561 34254 21 M16 185
  13.386 21.063 11.811 15.827 4.567 4.173 3.307 238973 34254 21 M16 185
  13.386 21.063 11.417 15.827 4.567 4.173 3.307 221271 34254 21 M16 185
  13.780 21.457 11.811 16.260 5.315 4.803 3.937 274376 33383 16 M20 361
  13.780 21.457 12.008 16.260 5.315 4.803 3.937 283964 33383 16 M20 361
  13.780 21.457 12.205 16.260 5.315 4.803 3.937 295028 33383 16 M20 361
  14.173 21.850 12.598 16.654 5.315 4.803 3.937 306092 32367 16 M20 361
  14.173 21.850 11.811 16.654 5.315 4.803 3.937 265525 32367 16 M20 361
  14.173 21.850 12.205 16.654 5.315 4.803 3.937 286177 32367 16 M20 361
  14.961 23.031 12.992 17.402 5.866 5.354 4.409 344445 30916 18 M20 361
  14.961 23.031 12.795 17.402 5.866 5.354 4.409 332644 30916 18 M20 361
  14.961 23.031 12.598 17.402 5.866 5.354 4.409 320843 30916 18 M20 361
  15.354 23.425 12.992 17.795 5.866 5.354 4.409 372473 33383 20 M20 361
  15.354 23.425 13.386 17.795 5.866 5.354 4.409 398288 33383 20 M20 361
  15.354 23.425 13.780 17.795 5.866 5.354 4.409 425578 33383 20 M20 361
  15.748 24.213 14.173 18.189 5.866 5.354 4.409 461719 34254 21 M20 361
  15.748 24.213 13.386 18.189 5.866 5.354 4.409 405664 34254 21 M20 361
  15.748 24.213 13.780 18.189 5.866 5.354 4.409 432954 34254 21 M20 361
  16.535 24.803 14.567 19.094 6.181 5.669 4.724 483108 31787 22 M20 361
  16.535 24.803 14.173 19.094 6.181 5.669 4.724 455081 31787 22 M20 361
  16.535 24.803 13.780 19.094 6.181 5.669 4.724 426315 31787 22 M20 361
  17.323 25.984 14.567 19.882 6.181 5.669 4.724 499335 33238 24 M20 361
  17.323 25.984 14.961 19.882 6.181 5.669 4.724 530313 33238 24 M20 361
  17.323 25.984 15.354 19.882 6.181 5.669 4.724 562028 33238 24 M20 361
  18.110 26.969 16.142 20.748 6.732 6.220 5.197 689628 33674 28 M20 361
  18.110 26.969 15.354 20.748 6.732 6.220 5.197 619559 33674 28 M20 361
  18.110 26.969 15.748 20.748 6.732 6.220 5.197 656437 33674 28 M20 361
  18.898 28.150 16.535 21.535 6.732 6.220 5.197 694053 32222 28 M20 361
  18.898 28.150 16.732 21.535 6.732 6.220 5.197 712493 32222 28 M20 361
  18.898 28.150 16.142 21.535 6.732 6.220 5.197 657175 32222 28 M20 361
  19.685 29.528 16.732 22.323 6.732 6.220 5.197 727244 33093 30 M20 361
  19.685 29.528 16.929 22.323 6.732 6.220 5.197 747158 33093 30 M20 361
  19.685 29.528 17.323 22.323 6.732 6.220 5.197 786250 33093 30 M20 361

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.

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 4051 Light Duty 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 h9

Recommended Applications

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