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Shrink Disc RfN 4181 Heavy Duty Series

Two part shrink heavy duty series – with additional guide mechanism for the inner ring. For the transmission of maximum torques.

RINGFEDER® RfN 4181

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metric inch
CAD d D dw L L1 L3 T Fax DG TA Gw
  mm mm mm mm mm mm Nm kN mm Nm kg
  220 370 160 116,0 103,0 87 160000 2000 20 580 53,1
  220 370 170 116,0 103,0 87 182000 2150 20 580 53,1
  220 370 180 116,0 103,0 87 206000 2300 20 580 53,1
  240 405 170 122,0 109,0 92 190000 2250 20 580 67,1
  240 405 180 122,0 109,0 92 215000 2400 20 580 67,1
  240 405 200 122,0 109,0 92 269000 2700 20 580 67,1
  260 430 190 129,0 116,0 102 247000 2600 20 580 77,7
  260 430 200 129,0 116,0 102 277000 2750 20 580 77,7
  260 430 220 129,0 116,0 102 340000 3100 20 580 77,7
  280 460 210 135,0 121,0 117 282000 2686 20 580 99,5
  280 460 220 135,0 121,0 117 313000 2845 20 580 99,5
  280 460 240 135,0 121,0 117 380000 3167 20 580 99,5
  300 485 220 157,0 142,0 122 385000 3500 24 980 119,1
  300 485 230 157,0 142,0 122 425000 3700 24 980 119,1
  300 485 250 157,0 142,0 122 505000 4050 24 980 119,1
  320 520 240 156,6 141,6 124 444000 3700 24 980 132,1
  320 520 250 156,6 141,6 124 488000 3904 24 980 132,1
  320 520 270 156,6 141,6 124 580000 4296 24 980 132,1
  340 570 250 170,0 155,0 135 564000 4500 24 980 186,6
  340 570 260 170,0 155,0 135 612000 4700 24 980 186,6
  340 570 280 170,0 155,0 135 719000 5150 24 980 186,6
  350 580 270 178,0 163,0 140 590000 4370 24 980 189
  350 580 280 178,0 163,0 140 650000 4643 24 980 189
  350 580 290 178,0 163,0 140 700000 4828 24 980 189
  360 590 270 171,0 156,0 133 658000 4850 24 980 194,3
  360 590 280 171,0 156,0 133 712000 5100 24 980 194,3
  360 590 300 171,0 156,0 133 825000 5500 24 980 194,3
  380 640 290 185,0 168,0 148 735000 5069 27 1450 247,5
  380 640 300 185,0 168,0 148 790000 5266 27 1450 247,5
  380 640 310 185,0 168,0 148 845000 5452 27 1450 247,5
  390 650 290 186,0 168,0 144 903000 6250 30 1900 258,4
  390 650 300 186,0 168,0 144 970000 6450 30 1900 258,4
  390 650 320 186,0 168,0 144 1110000 6950 30 1900 258,4
  400 660 300 203,0 186,0 168 800000 5333 27 1450 316,1
  400 660 310 203,0 186,0 168 870000 5613 27 1450 316,1
  400 660 320 203,0 186,0 168 900000 5625 27 1450 316,1
  420 670 320 205,0 186,0 166 969000 6056 30 1900 296,9
  420 670 330 205,0 186,0 166 1038000 6291 30 1900 296,9
  420 670 350 205,0 186,0 166 1183000 6762 30 1900 296,9
  440 740 340 213,0 194,0 181 1212000 7129 30 1900 384,7
  440 740 350 213,0 194,0 181 1292000 7383 30 1900 384,7
  440 740 370 213,0 194,0 181 1460000 7892 30 1900 384,7
  460 770 360 223,0 202,0 172 1532000 8511 27 1450 474,8
  460 770 370 223,0 202,0 172 1626000 8789 27 1450 474,8
  460 770 390 223,0 202,0 172 1826000 9364 27 1450 474,8
  480 800 380 233,0 214,0 188 1822000 9589 30 1900 495,4
  480 800 390 233,0 214,0 188 1929000 9892 30 1900 495,4
  480 800 410 233,0 214,0 188 2151000 10493 30 1900 495,4
  500 850 400 234,0 215,0 190 2075000 10375 30 1900 626,3
  500 850 410 234,0 215,0 190 2191000 10688 30 1900 626,3
  500 850 430 234,0 215,0 190 2432000 11312 30 1900 626,3
  520 850 420 249,0 231,0 198 1865000 8881 30 1900 643,9
  520 850 430 249,0 231,0 198 1909000 8879 30 1900 643,9
  520 850 440 249,0 231,0 198 2000000 9090 30 1900 643,9
  530 850 430 260,0 240,0 206 2397000 11150 30 1900 653,4
  530 850 440 260,0 240,0 206 2520520 11457 30 1900 653,4
  530 850 460 260,0 240,0 206 2777417 12076 30 1900 653,4
  540 910 440 261,0 242,0 213 1960000 8900 30 1900 800,5
  540 910 450 261,0 242,0 213 2060000 9150 30 1900 800,5
  540 910 460 261,0 242,0 213 2160000 9400 30 1900 800,5
  560 940 450 260,0 240,0 206 2545000 11311 30 1900 748,7
  560 940 460 260,0 240,0 206 2670006 11609 30 1900 748,7
  560 940 480 260,0 240,0 206 2929521 12206 30 1900 748,7
  580 960 460 279,0 260,0 228 2904000 12626 30 1900 938,1
  580 960 470 279,0 260,0 228 2968000 13906 30 1900 938,1
  580 960 480 279,0 260,0 228 3107000 12945 30 1900 938,1
  590 960 470 380,0 361,0 286 4012000 17072 30 1900 1173,9
  590 960 480 380,0 361,0 286 4199188 17497 30 1900 1173,9
  590 960 500 380,0 361,0 286 4587043 18348 30 1900 1173,9
  620 970 500 304,0 285,0 244 3402000 13608 30 1900 886,7
  620 970 520 304,0 285,0 244 3708000 14261 30 1900 886,7
  620 970 540 304,0 285,0 244 4028000 14918 30 1900 886,7
  640 1040 520 327,0 306,0 275 3819000 14688 33 2700 1267,8
  640 1040 540 327,0 306,0 275 3965000 14688 33 2700 1267,8
  640 1040 560 327,0 306,0 275 4113000 14688 33 2700 1267,8
  660 1040 530 418,0 396,0 310 5758000 21750 36 3500 1448,2
  660 1040 550 418,0 396,0 310 6236900 22680 36 3500 1448,2
  660 1040 570 418,0 396,0 310 6735919 23635 36 3500 1448,2
  700 1140 560 315,0 294,0 260 4518700 16138 33 2700 1467,5
  700 1140 580 315,0 294,0 260 4880000 16828 33 2700 1467,5
  700 1140 600 315,0 294,0 260 5258000 17527 33 2700 1467,5
  750 1150 600 340,0 428,0 360 7669000 25563 36 3500 1847,5
  750 1150 620 450,0 428,0 360 8228643 26544 36 3500 1847,5
  750 1150 650 450,0 428,0 360 9106895 28021 36 3500 1847,5
  800 1230 640 373,0 352,0 296 6897960 21226 33 2700 1894,4
  800 1230 660 373,0 352,0 296 7378000 22358 33 2700 1894,4
  800 1230 700 373,0 352,0 296 8390500 23973 33 2700 1894,4
CAD d D dw L L1 L3 T Fax DG TA Gw
  inch inch inch inch inch inch ft-lbs lbs mm ft-lbs lbs
  8.661 14.567 6.299 4.567 4.055 3.425 118010 449952 M20 428 117
  8.661 14.567 6.693 4.567 4.055 3.425 134236 483698 M20 428 117
  8.661 14.567 7.087 4.567 4.055 3.425 151938 517445 M20 428 117
  9.449 15.945 6.693 4.803 4.291 3.622 140137 506196 M20 428 148
  9.449 15.945 7.087 4.803 4.291 3.622 158576 539942 M20 428 148
  9.449 15.945 7.874 4.803 4.291 3.622 198404 607435 M20 428 148
  10.236 16.929 7.480 5.079 4.567 4.016 182178 584938 M20 428 171
  10.236 16.929 7.874 5.079 4.567 4.016 204305 618684 M20 428 171
  10.236 16.929 8.661 5.079 4.567 4.016 250771 697426 M20 428 219
  11.024 18.110 8.268 5.276 4.764 4.606 207992 604286 M20 428 219
  11.024 18.110 8.661 5.276 4.764 4.606 230857 640057 M20 428 219
  11.024 18.110 9.449 5.276 4.764 4.606 280274 712499 M20 428 219
  11.811 19.094 8.661 6.181 5.591 4.803 283961 787416 M24 725 263
  11.811 19.094 9.055 6.181 5.591 4.803 313464 832411 M24 725 263
  11.811 19.094 9.843 6.181 5.591 4.803 372469 911153 M24 725 263
  12.598 20.472 9.449 6.165 5.575 4.882 327478 832411 M24 725 291
  12.598 20.472 9.843 6.165 5.575 4.882 359930 878306 M24 725 291
  12.598 20.472 10.630 6.165 5.575 4.882 427786 966497 M24 725 291
  13.386 22.441 9.843 6.693 6.102 5.315 415985 1012392 M24 725 411
  13.386 22.441 10.236 6.693 6.102 5.315 451388 1057387 M24 725 411
  13.386 22.441 11.024 6.693 6.102 5.315 530307 1158626 M24 725 411
  13.780 22.835 10.630 7.008 6.417 5.512 435162 983145 M24 725 417
  13.780 22.835 11.024 7.008 6.417 5.512 479415 1044564 M24 725 417
  13.780 22.835 11.417 7.008 6.417 5.512 516293 1086184 M24 725 417
  14.173 23.228 10.630 6.732 6.142 5.236 485316 1091134 M24 725 428
  14.173 23.228 11.024 6.732 6.142 5.236 525144 1147378 M24 725 428
  14.173 23.228 11.811 6.732 6.142 5.236 608489 1237368 M24 725 428
  14.961 25.197 11.417 7.283 6.614 5.827 542108 1140403 M27 1070 546
  14.961 25.197 11.811 7.283 6.614 5.827 582674 1184724 M27 1070 546
  14.961 25.197 12.205 7.283 6.614 5.827 623240 1226569 M27 1070 546
  15.354 25.591 11.417 7.323 6.614 5.669 666018 1406100 M30 1400 570
  15.354 25.591 11.811 7.323 6.614 5.669 715435 1451095 M30 1400 570
  15.354 25.591 12.598 7.323 6.614 5.669 818694 1563583 M30 1400 570
  15.748 25.984 11.811 7.992 7.323 6.614 590050 1199797 M27 1070 697
  15.748 25.984 12.205 7.992 7.323 6.614 641679 1262790 M27 1070 697
  15.748 25.984 12.598 7.992 7.323 6.614 663806 1265490 M27 1070 697
  16.535 26.378 12.598 8.071 7.323 6.535 714698 1362455 M30 1400 655
  16.535 26.378 12.992 8.071 7.323 6.535 765589 1415324 M30 1400 655
  16.535 26.378 13.780 8.071 7.323 6.535 872536 1521288 M30 1400 655
  17.323 29.134 13.386 8.386 7.638 7.126 893925 1603854 M30 1400 848
  17.323 29.134 13.780 8.386 7.638 7.126 952930 1660998 M30 1400 848
  17.323 29.134 14.567 8.386 7.638 7.126 1076841 1775511 M30 1400 848
  18.110 30.315 14.173 8.780 7.953 6.772 1129945 1914771 M27 1070 1047
  18.110 30.315 14.567 8.780 7.953 6.772 1199276 1977314 M27 1070 1047
  18.110 30.315 15.354 8.780 7.953 6.772 1346788 2106675 M27 1070 1047
  18.898 31.496 14.961 9.173 8.425 7.402 1343838 2157295 M30 1400 1092
  18.898 31.496 15.354 9.173 8.425 7.402 1422757 2225463 M30 1400 1092
  18.898 31.496 16.142 9.173 8.425 7.402 1586496 2360673 M30 1400 1092
  19.685 33.465 15.748 9.213 8.465 7.480 1530441 2334126 M30 1400 1381
  19.685 33.465 16.142 9.213 8.465 7.480 1615998 2404543 M30 1400 1381
  19.685 33.465 16.929 9.213 8.465 7.480 1793751 2544929 M30 1400 1381
  20.472 33.465 16.535 9.803 9.094 7.795 1375553 1998012 M30 1400 1420
  20.472 33.465 16.929 9.803 9.094 7.795 1408006 1997562 M30 1400 1420
  20.472 33.465 17.323 9.803 9.094 7.795 1475124 2045032 M30 1400 1420
  20.866 33.465 16.929 10.236 9.449 8.110 1767936 2508482 M30 1400 1440
  20.866 33.465 17.323 10.236 9.449 8.110 1859040 2577550 M30 1400 1440
  20.866 33.465 18.110 10.236 9.449 8.110 2048517 2716810 M30 1400 1440
  21.260 35.827 17.323 10.276 9.528 8.386 1445622 2002286 M30 1400 1765
  21.260 35.827 17.717 10.276 9.528 8.386 1519378 2058530 M30 1400 1765
  21.260 35.827 18.110 10.276 9.528 8.386 1593134 2114774 M30 1400 1765
  22.047 37.008 17.717 10.236 9.449 8.110 1877095 2544704 M30 1400 1651
  22.047 37.008 18.110 10.236 9.449 8.110 1969295 2611746 M30 1400 1651
  22.047 37.008 18.898 10.236 9.449 8.110 2160703 2746057 M30 1400 1651
  22.835 37.795 18.110 10.984 10.236 8.976 2141880 2840547 M30 1400 2068
  22.835 37.795 18.504 10.984 10.236 8.976 2189084 3128516 M30 1400 2068
  22.835 37.795 18.898 10.984 10.236 8.976 2291605 2912314 M30 1400 2068
  23.228 37.795 18.504 14.961 14.213 11.260 2959099 3840790 M30 1400 2588
  23.228 37.795 18.898 14.961 14.213 11.260 3097161 3936405 M30 1400 2588
  23.228 37.795 19.685 14.961 14.213 11.260 3383229 4127860 M30 1400 2588
  24.409 38.189 19.685 11.969 11.220 9.606 2509186 3061473 M30 1400 1955
  24.409 38.189 20.472 11.969 11.220 9.606 2734880 3208383 M30 1400 1955
  24.409 38.189 21.260 11.969 11.220 9.606 2970900 3356192 M30 1400 1955
  25.197 40.945 20.472 12.874 12.047 10.827 2816749 3304447 M33 1990 2795
  25.197 40.945 21.260 12.874 12.047 10.827 2924433 3304447 M33 1990 2795
  25.197 40.945 22.047 12.874 12.047 10.827 3033593 3304447 M33 1990 2795
  25.984 40.945 20.866 16.457 15.591 12.205 4246882 4893228 M36 2580 3193
  25.984 40.945 21.654 16.457 15.591 12.205 4600100 5102456 M36 2580 3193
  25.984 40.945 22.441 16.457 15.591 12.205 4968158 5317308 M36 2580 3193
  27.559 44.882 22.047 12.402 11.575 10.236 3332821 3630663 M33 1990 3235
  27.559 44.882 22.835 12.402 11.575 10.236 3599303 3785896 M33 1990 3235
  27.559 44.882 23.622 12.402 11.575 10.236 3878101 3943154 M33 1990 3235
  29.528 45.276 23.622 13.386 16.850 14.173 5656363 5751061 M36 2580 4073
  29.528 45.276 24.409 17.717 16.850 14.173 6069134 5971763 M36 2580 4073
  29.528 45.276 25.591 17.717 16.850 14.173 6716900 6304052 M36 2580 4073
  31.496 48.425 25.197 14.685 13.858 11.654 5087673 4775341 M33 1990 4176
  31.496 48.425 25.984 14.685 13.858 11.654 5441732 5030013 M33 1990 4176
  31.496 48.425 27.559 14.685 13.858 11.654 6188514 5393350 M33 1990 4176

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.

  • Two part shrink heavy duty series – with additional guide mechanism for the inner ring. For the transmission of maximum torques.
  • 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.
  • Highest reliability – applicable for static, dynamic and impact loads.
  • Simplified manufacture – only plain shaft and bore diameters with easily achieved surface finish and tolerances are required.
  • Fully replaceable – The RINGFEDER® shrink discs work without any positive locking.
  • Visual check of the tightening status – minimisation of faults
    during assembly.
  • Easy mounting – RINGFEDER® Shrink Discs use standard
    screws and tightened using standard tools. No additional machining or fitting work is required.
  • Short assembly times - cost savings particularly in series production.
  • Low susceptibility to contamination – when the locking screws
    are tightened the contact (functional) surfaces are pressed firmly together and prevent the ingress of dirt and moisture.
  • Easy adjustability – no stops, steps, key-ways, splines etc. are
    required therefore, hubs can be located and locked at any point or
    angle on the shaft.

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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