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Shrink Disc RfN 4061 Standard Series/split

Standard series – this range is the most popular, being used in most applications.
This new design of Shrink Disc is made from high alloy forged rings and is practically indestructible. Replacing the smaller 4071 design, these units are available from 14mm to 195mm bore.

RINGFEDER® RfN 4061

CAD data download is available after login.
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
  14 37 10 24 14,8 12 9 30 278 3 4 2,4
  14 37 11 24 14,8 12 9 37 278 3 4 2,4
  14 37 12 24 14,8 12 9 48 278 3 4 2,4
  16 41 12 27 18,5 15 12 70 336 4 5 4
  16 41 13 27 18,5 15 12 90 336 4 5 4
  16 41 14 27 18,5 15 12 110 336 4 5 4
  18 44 14 29 18,5 15 12 90 299 4 5 4
  18 44 15 29 18,5 15 12 100 299 4 5 4
  18 44 16 29 18,5 15 12 120 299 4 5 4
  20 46 15 32 21 17,5 12 110 336 5 5 4
  20 46 16 32 21 17,5 12 140 336 5 5 4
  20 46 17 32 21 17,5 12 160 336 5 5 4
  21 50 16 36 22,5 19 15 200 384 6 5 5
  21 50 17 36 22,5 19 15 230 384 6 5 5
  21 50 18 36 22,5 19 15 260 384 6 5 5
  24 50 19 36 22,5 19 15 240 336 6 5 5
  24 50 20 36 22,5 19 15 270 336 6 5 5
  24 50 21 36 22,5 19 15 300 336 6 5 5
  30 52 24 41,5 26 22,5 18 350 261 7 5 5
  30 52 25 41,5 26 22,5 18 400 261 7 5 5
  30 52 26 41,5 26 22,5 18 440 261 7 5 5
  36 72 28 52 27,5 23,5 18 590 303 5 6 12
  36 72 30 52 27,5 23,5 18 690 303 5 6 12
  36 72 31 52 27,5 23,5 18 700 303 5 6 12
  38 72 29 55 30 26 21 700 295 6 6 12
  38 72 30 55 30 26 21 770 295 6 6 12
  38 72 31 55 30 26 21 780 295 6 6 12
  40 72 30 57 28,5 24,5 19 720 310 6 6 12
  40 72 31 57 28,5 24,5 19 730 310 6 6 12
  40 72 32 57 28,5 24,5 19 790 310 6 6 12
  44 80 32 63 30 26 20 800 312 7 6 12
  44 80 35 63 30 26 20 1000 312 7 6 12
  44 80 36 63 30 26 20 1050 312 7 6 12
  48 80 36 68 30 26 22 900 260 7 6 12
  48 80 38 68 30 26 22 1050 260 7 6 12
  48 80 40 68 30 26 22 1200 260 7 6 12
  50 90 38 70 31,5 27,5 22,5 1350 314 9 6 12
  50 90 40 70 31,5 27,5 22,5 1500 314 9 6 12
  50 90 42 70 31,5 27,5 22,5 1700 314 9 6 12
  55 100 42 75 34,5 30,5 23 1300 248 8 6 12
  55 100 45 75 34,5 30,5 23 1550 248 8 6 12
  55 100 48 75 34,5 30,5 23 1800 248 8 6 12
  62 110 48 86 34,5 30,5 23 2400 330 12 6 12
  62 110 50 86 34,5 30,5 23 2650 330 12 6 12
  62 110 52 86 34,5 30,5 23 2800 330 12 6 12
  68 115 50 86 34,5 30,5 23,5 1900 245 10 6 12
  68 115 55 86 34,5 30,5 23,5 2250 245 10 6 12
  68 115 60 86 34,5 30,5 23,5 2850 245 10 6 12
  75 138 55 100 37,8 32,5 25 2650 277 7 8 30
  75 138 60 100 37,8 32,5 25 3300 277 7 8 30
  75 138 65 100 37,8 32,5 25 4050 277 7 8 30
  80 145 60 100 37,8 32,5 25 3200 259 7 8 30
  80 145 65 100 37,8 32,5 25 3900 259 7 8 30
  80 145 70 100 37,8 32,5 25 4600 259 7 8 30
  85 155 60 114 45,8 40,5 30 4850 325 11 8 30
  85 155 65 114 45,8 40,5 30 5800 325 11 8 30
  85 155 70 114 45,8 40,5 30 6800 325 11 8 30
  90 155 65 114 44,5 39 30 4800 274 10 8 30
  90 155 70 114 44,5 39 30 6050 274 10 8 30
  90 155 75 114 44,5 39 30 7300 274 10 8 30
  95 170 65 127 52,5 47,2 34 5350 275 12 8 30
  95 170 70 127 52,5 47,2 34 6750 275 12 8 30
  95 170 75 127 52,5 47,2 34 8150 275 12 8 30
  100 170 70 127 52,5 47,2 34 6950 261 12 8 30
  100 170 75 127 52,5 47,2 34 7600 261 12 8 30
  100 170 80 127 52,5 47,2 34 9100 261 12 8 30
  110 185 75 145 59,4 53 42 8150 254 10 10 59
  110 185 80 145 59,4 53 42 10100 254 10 10 59
  110 185 85 145 59,4 53 42 12200 254 10 10 59
  115 185 80 145 62,4 56 42 9500 243 10 10 59
  115 185 90 145 62,4 56 42 12100 243 10 10 59
  115 185 95 145 62,4 56 42 14050 243 10 10 59
  125 215 85 160 60,4 54 42 11050 269 12 10 59
  125 215 90 160 60,4 54 42 13100 269 12 10 59
  125 215 95 160 60,4 54 42 15150 269 12 10 59
  140 230 95 175 68 60,5 46 15100 263 10 12 100
  140 230 100 175 68 60,5 46 17550 263 10 12 100
  140 230 105 175 68 60,5 46 20000 263 10 12 100
  165 290 115 210 81 71 56 31400 280 8 16 250
  165 290 120 210 81 71 56 35500 280 8 16 250
  165 290 125 210 81 71 56 39400 280 8 16 250
  185 330 135 236 96,4 86,4 71 52500 246 10 16 250
  185 330 140 236 96,4 86,4 71 57350 246 10 16 250
  185 330 145 236 96,4 86,4 71 62400 246 10 16 250
  195 350 140 246 96 86 71 65950 280 12 16 250
  195 350 150 246 96 86 71 77600 280 12 16 250
  195 350 155 246 96 86 71 83750 280 12 16 250
  200 350 150 246 96 86 71 75000 273 12 16 250
  200 350 155 246 96 86 71 81000 273 12 16 250
  200 350 160 246 96 86 71 87200 273 12 16 250
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
  0.551 1.457 0.394 0.945 0.583 0.472 0.354 22 40350 3 M4 2
  0.551 1.457 0.433 0.945 0.583 0.472 0.354 27 40350 3 M4 2
  0.551 1.457 0.472 0.945 0.583 0.472 0.354 35 40350 3 M4 2
  0.630 1.614 0.472 1.063 0.728 0.591 0.472 52 48769 4 M5 3
  0.630 1.614 0.512 1.063 0.728 0.591 0.472 66 48769 4 M5 3
  0.630 1.614 0.551 1.063 0.728 0.591 0.472 81 48769 4 M5 3
  0.709 1.732 0.551 1.142 0.728 0.591 0.472 66 43398 4 M5 3
  0.709 1.732 0.591 1.142 0.728 0.591 0.472 74 43398 4 M5 3
  0.709 1.732 0.630 1.142 0.728 0.591 0.472 89 43398 4 M5 3
  0.787 1.811 0.591 1.260 0.827 0.689 0.472 81 48769 5 M5 3
  0.787 1.811 0.630 1.260 0.827 0.689 0.472 103 48769 5 M5 3
  0.787 1.811 0.669 1.260 0.827 0.689 0.472 118 48769 5 M5 3
  0.827 1.969 0.630 1.417 0.886 0.748 0.591 148 55736 6 M5 3.7
  0.827 1.969 0.669 1.417 0.886 0.748 0.591 170 55736 6 M5 3.7
  0.827 1.969 0.709 1.417 0.886 0.748 0.591 192 55736 6 M5 3.7
  0.945 1.969 0.748 1.417 0.886 0.748 0.591 177 48769 6 M5 3.7
  0.945 1.969 0.787 1.417 0.886 0.748 0.591 199 48769 6 M5 3.7
  0.945 1.969 0.827 1.417 0.886 0.748 0.591 221 48769 6 M5 3.7
  1.181 2.047 0.945 1.634 1.024 0.886 0.709 258 37883 7 M5 3.7
  1.181 2.047 0.984 1.634 1.024 0.886 0.709 295 37883 7 M5 3.7
  1.181 2.047 1.024 1.634 1.024 0.886 0.709 325 37883 7 M5 3.7
  1.417 2.835 1.102 2.047 1.083 0.925 0.709 435 43979 5 M6 9
  1.417 2.835 1.181 2.047 1.083 0.925 0.709 509 43979 5 M6 9
  1.417 2.835 1.220 2.047 1.083 0.925 0.709 516 43979 5 M6 9
  1.496 2.835 1.142 2.165 1.181 1.024 0.827 516 42818 6 M6 9
  1.496 2.835 1.181 2.165 1.181 1.024 0.827 568 42818 6 M6 9
  1.496 2.835 1.220 2.165 1.181 1.024 0.827 575 42818 6 M6 9
  1.575 2.835 1.181 2.244 1.122 0.965 0.748 531 44995 6 M6 9
  1.575 2.835 1.220 2.244 1.122 0.965 0.748 538 44995 6 M6 9
  1.575 2.835 1.260 2.244 1.122 0.965 0.748 583 44995 6 M6 9
  1.732 3.150 1.260 2.480 1.181 1.024 0.787 590 45285 7 M6 9
  1.732 3.150 1.378 2.480 1.181 1.024 0.787 738 45285 7 M6 9
  1.732 3.150 1.417 2.480 1.181 1.024 0.787 774 45285 7 M6 9
  1.890 3.150 1.417 2.677 1.181 1.024 0.866 664 37738 7 M6 9
  1.890 3.150 1.496 2.677 1.181 1.024 0.866 774 37738 7 M6 9
  1.890 3.150 1.575 2.677 1.181 1.024 0.866 885 37738 7 M6 9
  1.969 3.543 1.496 2.756 1.240 1.083 0.886 996 45576 9 M6 9
  1.969 3.543 1.575 2.756 1.240 1.083 0.886 1106 45576 9 M6 9
  1.969 3.543 1.654 2.756 1.240 1.083 0.886 1254 45576 9 M6 9
  2.165 3.937 1.654 2.953 1.358 1.201 0.906 959 35996 8 M6 9
  2.165 3.937 1.772 2.953 1.358 1.201 0.906 1143 35996 8 M6 9
  2.165 3.937 1.890 2.953 1.358 1.201 0.906 1328 35996 8 M6 9
  2.441 4.331 1.890 3.386 1.358 1.201 0.906 1770 47898 12 M6 9
  2.441 4.331 1.969 3.386 1.358 1.201 0.906 1955 47898 12 M6 9
  2.441 4.331 2.047 3.386 1.358 1.201 0.906 2065 47898 12 M6 9
  2.677 4.528 1.969 3.386 1.358 1.201 0.925 1401 35561 10 M6 9
  2.677 4.528 2.165 3.386 1.358 1.201 0.925 1660 35561 10 M6 9
  2.677 4.528 2.362 3.386 1.358 1.201 0.925 2102 35561 10 M6 9
  2.953 5.433 2.165 3.937 1.488 1.280 0.984 1955 40205 7 M8 22
  2.953 5.433 2.362 3.937 1.488 1.280 0.984 2434 40205 7 M8 22
  2.953 5.433 2.559 3.937 1.488 1.280 0.984 2987 40205 7 M8 22
  3.150 5.709 2.362 3.937 1.488 1.280 0.984 2360 37593 7 M8 22
  3.150 5.709 2.559 3.937 1.488 1.280 0.984 2876 37593 7 M8 22
  3.150 5.709 2.756 3.937 1.488 1.280 0.984 3393 37593 7 M8 22
  3.346 6.102 2.362 4.488 1.803 1.594 1.181 3577 47172 11 M8 22
  3.346 6.102 2.559 4.488 1.803 1.594 1.181 4278 47172 11 M8 22
  3.346 6.102 2.756 4.488 1.803 1.594 1.181 5015 47172 11 M8 22
  3.543 6.102 2.559 4.488 1.752 1.535 1.181 3540 39770 10 M8 22
  3.543 6.102 2.756 4.488 1.752 1.535 1.181 4462 39770 10 M8 22
  3.543 6.102 2.953 4.488 1.752 1.535 1.181 5384 39770 10 M8 22
  3.740 6.693 2.559 5.000 2.067 1.858 1.339 3946 39915 12 M8 22
  3.740 6.693 2.756 5.000 2.067 1.858 1.339 4979 39915 12 M8 22
  3.740 6.693 2.953 5.000 2.067 1.858 1.339 6011 39915 12 M8 22
  3.937 6.693 2.756 5.000 2.067 1.858 1.339 5126 37883 12 M8 22
  3.937 6.693 2.953 5.000 2.067 1.858 1.339 5605 37883 12 M8 22
  3.937 6.693 3.150 5.000 2.067 1.858 1.339 6712 37883 12 M8 22
  4.331 7.283 2.953 5.709 2.339 2.087 1.654 6011 36867 10 M10 45
  4.331 7.283 3.150 5.709 2.339 2.087 1.654 7449 36867 10 M10 45
  4.331 7.283 3.346 5.709 2.339 2.087 1.654 8998 36867 10 M10 45
  4.528 7.283 3.150 5.709 2.457 2.205 1.654 7007 35270 10 M10 45
  4.528 7.283 3.543 5.709 2.457 2.205 1.654 8925 35270 10 M10 45
  4.528 7.283 3.740 5.709 2.457 2.205 1.654 10363 35270 10 M10 45
  4.921 8.465 3.346 6.299 2.378 2.126 1.654 8150 39044 12 M10 45
  4.921 8.465 3.543 6.299 2.378 2.126 1.654 9662 39044 12 M10 45
  4.921 8.465 3.740 6.299 2.378 2.126 1.654 11174 39044 12 M10 45
  5.512 9.055 3.740 6.890 2.677 2.382 1.811 11137 38173 10 M12 75
  5.512 9.055 3.937 6.890 2.677 2.382 1.811 12944 38173 10 M12 75
  5.512 9.055 4.134 6.890 2.677 2.382 1.811 14751 38173 10 M12 75
  6.496 11.417 4.528 8.268 3.189 2.795 2.205 23159 40641 8 M16 185
  6.496 11.417 4.724 8.268 3.189 2.795 2.205 26183 40641 8 M16 185
  6.496 11.417 4.921 8.268 3.189 2.795 2.205 29060 40641 8 M16 185
  7.283 12.992 5.315 9.291 3.795 3.402 2.795 38722 35706 10 M16 185
  7.283 12.992 5.512 9.291 3.795 3.402 2.795 42299 35706 10 M16 185
  7.283 12.992 5.709 9.291 3.795 3.402 2.795 46024 35706 10 M16 185
  7.677 13.780 5.512 9.685 3.780 3.386 2.795 48642 40641 12 M16 185
  7.677 13.780 5.906 9.685 3.780 3.386 2.795 57235 40641 12 M16 185
  7.677 13.780 6.102 9.685 3.780 3.386 2.795 61771 40641 12 M16 185
  7.874 13.780 5.906 9.685 3.780 3.386 2.795 55317 39625 12 M16 185
  7.874 13.780 6.102 9.685 3.780 3.386 2.795 59743 39625 12 M16 185
  7.874 13.780 6.299 9.685 3.780 3.386 2.795 64315 39625 12 M16 185

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.
  • Standard series – this is the most popular shrink disc. High transmission values are possible and by varying the screw tightening torque the Shrink Disc can be adapted to the design specification.
  • 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 replacement – The RINGFEDER® shrink disc is free from any form fit.
  • 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 removal – after loosening the locking screws, the RINGFEDER® Shrink Disc will self release and the hub will move freely on the shaft.
  • 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 4061 Standard 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 see table at right

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