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Locking Element RfN 8006 solid

Locking Elements consist of an internal and external tapered ring. When axial force is exerted on a set of Locking Elements, radial clamping pressures are generated on the shaft and in the hub bore providing a frictional connection. Units may be stacked up to three elements deep for greater torques. For light to medium duty applications.

RINGFEDER® RfN 8006 solid

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metric inch
CAD d D L L3 F0 FA T100 Tmax
  mm mm mm mm kN kN Nm Nm
  9 12 4.5 3.7 7.6 5.7 5.7 8.7
  10 13 4.5 3.7 6.95 6.3 7 12
  11 14 4.5 3.7 7.5 6.9 8 15
  12 15 4.5 3.7 6.9 7.5 10 19
  13 16 4.5 3.7 6.4 8.2 12 23
  14 18 6.3 5.3 11.2 12.6 20 34
  15 19 6.3 5.3 10.7 13.5 23 41
  16 20 6.3 5.3 10.1 14.4 26 48
  17 21 6.3 5.3 9.5 15.3 29 56
  18 22 6.3 5.3 9.1 16.2 33 65
  19 24 6.3 5.3 12.6 17.1 36 91
  20 25 6.3 5.3 12.0 18 40 103
  22 26 6.3 5.3 9.0 19.8 48 100
  24 28 6.3 5.3 8.3 21.6 58 122
  25 30 6.3 5.3 9.9 22.5 62 171
  28 32 6.3 5.3 7.4 25.2 78 171
  30 35 6.3 5.3 8.5 27 90 252
  32 36 6.3 5.3 7.8 28.8 102 223
  35 40 7 6 10.1 35.6 138 339
  36 42 7 6 11.6 36.6 147 439
  38 44 7 6 11.0 38.7 163 492
  40 45 8 6.6 13.8 45 199 428
  42 48 8 6.6 15.6 47 219 580
  45 52 10 8.6 26.1 66 328 750
  48 55 10 8.6 24.6 70 373 865
  50 57 10 8.6 23.5 73 405 948
  55 62 10 8.6 21.8 80 490 1160
  56 64 12 10.4 29.4 99 615 1370
  60 68 12 10.4 27.4 106 705 1590
  63 71 12 10.4 26.3 111 780 1760
  65 73 12 10.4 25.4 115 830 1880
  70 79 14 12.2 31.0 145 1120 2460
  71 80 14 12.2 31.0 147 1160 2530
  75 84 14 12.2 34.6 155 1290 2800
  80 91 17 15 48.0 203 1810 3910
  85 96 17 15 45.6 216 2040 4440
  90 101 17 15 43.4 229 2290 5010
  95 106 17 15 41.2 242 2550 5610
  100 114 21 18.7 60.7 317 3520 7950
  110 124 21 18.7 66.0 349 4250 9570
  120 134 21 18.7 60.2 380 5050 11500
  130 148 28 25.3 96.2 558 8050 17300
  140 158 28 25.3 89.0 600 9350 20200
  150 168 28 25.3 84.5 643 10700 23300
  160 178 28 25.3 78.5 686 12200 26600
  170 191 33 30 117.5 865 16300 34900
  180 201 33 30 111.2 916 18300 39200
  190 211 33 30 105.0 966 20400 43900
  200 224 38 34.8 134.0 1180 26200 55600
  210 234 38 34.8 127.0 1239 28900 61500
  220 244 38 34.8 122.0 1298 31700 67400
  230 257 43 39.5 165.0 1540 39400 82900
  240 267 43 39.5 157.5 1610 43000 90400
  250 280 48 44 190.0 1870 52000 109000
  260 290 48 44 182 1950 56500 118300
  270 300 48 44 177 2030 61000 128000
  280 313 53 49 206 2330 72500 151000
  290 323 53 49 222 2410 77500 162000
  300 333 53 49 214 2490 83000 173000
  320 360 65 59 292 3200 114000 240000
  340 380 65 59 272 3400 128500 272000
  360 400 65 59 258 3600 144000 305000
  380 420 65 59 269 3800 160500 339000
  400 440 65 59 256 4000 178000 376000
  420 460 65 59 244 4200 196000 414000
  440 480 65 59 234 4400 215000 455000
  460 500 65 59 224 5000 256000 497000
  480 520 65 59 239 5000 344000 497000
  500 540 65 59 229 5000 278000 586000
  520 570 80 73 338 6450 373000 586000
  540 590 80 73 326 6700 402000 859000
  560 610 80 73 314 6950 432000 924000
  580 630 80 73 304 7200 464000 991000
  600 650 80 73 331 7450 497000 1058000
  620 670 80 73 321 7700 530430 1129000
  640 690 80 73 311 7950 565000 1203000
  660 710 80 73 302 8200 601000 1279000
  680 730 80 73 294 8450 638000 1358000
  700 750 80 73 286 8700 676649 1439212
  720 770 80 73 278 8950 715981 1522441
  740 790 80 73 271 9200 756424 1607925
  760 810 80 73 296 9450 797979 1693044
  780 830 80 73 289 9700 840644 1783128
  800 850 80 73 281 9900 879977 1875636
  820 870 80 73 275 10150 924753 1970300
  840 890 80 73 268 10400 970641 2067389
  860 910 80 73 263 10650 1017640 2166622
  880 930 80 73 256 10900 1065749 2268376
  900 950 80 73 250 11150 1114970 2372364
  920 970 80 73 246 11400 1165302 2478480
  940 990 80 73 240 11650 1216745 2587125
  960 1010 80 73 270 11900 1269300 2694261
  980 1030 80 73 264 12150 1322965 2807487
  1000 1050 80 73 259 12400 1377741 2922933
CAD d D L L3 F0 FA T100 Tmax
  inch inch inch inch lbs lbs ft-lbs ft-lbs
  0.354 0.472 0.177 0.146 1709 1281 4.2 6.4
  0.394 0.512 0.177 0.146 1563 1416 5.2 8.9
  0.433 0.551 0.177 0.146 1686 1551 5.9 10.8
  0.472 0.591 0.177 0.146 1551 1686 7.4 13.8
  0.512 0.630 0.177 0.146 1439 1844 8.9 17.2
  0.551 0.709 0.248 0.209 2518 2833 14.8 25
  0.591 0.748 0.248 0.209 2406 3035 17.0 30
  0.630 0.787 0.248 0.209 2271 3237 19.2 36
  0.669 0.827 0.248 0.209 2136 3440 21.4 42
  0.709 0.866 0.248 0.209 2046 3642 24 48
  0.748 0.945 0.248 0.209 2833 3844 27 67
  0.787 0.984 0.248 0.209 2698 4047 30 76
  0.866 1.024 0.248 0.209 2023 4451 35 73
  0.945 1.102 0.248 0.209 1866 4856 43 90
  0.984 1.181 0.248 0.209 2226 5058 46 126
  1.102 1.260 0.248 0.209 1664 5665 58 126
  1.181 1.378 0.248 0.209 1911 6070 66 186
  1.260 1.417 0.248 0.209 1754 6475 75 164
  1.378 1.575 0.276 0.236 2271 8004 102 250
  1.417 1.654 0.276 0.236 2608 8228 108 324
  1.496 1.732 0.276 0.236 2473 8701 120 363
  1.575 1.772 0.315 0.260 3103 10117 147 316
  1.654 1.890 0.315 0.260 3507 10567 162 428
  1.772 2.047 0.394 0.339 5868 14838 242 553
  1.890 2.165 0.394 0.339 5531 15737 275 638
  1.969 2.244 0.394 0.339 5283 16412 299 699
  2.165 2.441 0.394 0.339 4901 17986 361 859
  2.205 2.520 0.472 0.409 6610 22257 454 1007
  2.362 2.677 0.472 0.409 6160 23831 520 1170
  2.480 2.795 0.472 0.409 5913 24955 575 1299
  2.559 2.874 0.472 0.409 5710 25854 612 1389
  2.756 3.110 0.551 0.480 6969 32599 826 1816
  2.795 3.150 0.551 0.480 6969 33049 856 1869
  2.953 3.307 0.551 0.480 7779 34847 952 2067
  3.150 3.583 0.669 0.591 10791 45638 1335 2882
  3.346 3.780 0.669 0.591 10252 48561 1505 3277
  3.543 3.976 0.669 0.591 9757 51484 1689 3696
  3.740 4.173 0.669 0.591 9263 54406 1881 4141
  3.937 4.488 0.827 0.736 13647 71268 2596 5866
  4.331 4.882 0.827 0.736 14838 78462 3135 7060
  4.724 5.276 0.827 0.736 13534 85432 3725 8472
  5.118 5.827 1.102 0.996 21628 125450 5938 12794
  5.512 6.220 1.102 0.996 20009 134892 6897 14930
  5.906 6.614 1.102 0.996 18997 144559 7893 17199
  6.299 7.008 1.102 0.996 17648 154227 8999 19648
  6.693 7.520 1.299 1.181 26416 194469 12023 25739
  7.087 7.913 1.299 1.181 25000 205935 13499 28951
  7.480 8.307 1.299 1.181 23606 217176 15048 32352
  7.874 8.819 1.496 1.370 30126 265288 19326 41035
  8.268 9.213 1.496 1.370 28552 278552 21318 45348
  8.661 9.606 1.496 1.370 27428 291817 23383 49751
  9.055 10.118 1.693 1.555 37095 346223 29063 61131
  9.449 10.512 1.693 1.555 35409 361960 31718 66689
  9.843 11.024 1.890 1.732 42716 420414 38357 80543
  10.236 11.417 1.890 1.732 40917 438399 41676 87249
  10.630 11.811 1.890 1.732 39793 456385 44996 94157
  11.024 12.323 2.087 1.929 46313 523831 53479 111663
  11.417 12.717 2.087 1.929 49910 541817 57167 119337
  11.811 13.110 2.087 1.929 48112 559802 61224 127854
  12.598 14.173 2.559 2.323 65647 719424 84090 177231
  13.386 14.961 2.559 2.323 61151 764388 94786 200420
  14.173 15.748 2.559 2.323 58004 809353 106219 224858
  14.961 16.535 2.559 2.323 60477 854317 118390 249923
  15.748 17.323 2.559 2.323 57554 899281 131299 277097
  16.535 18.110 2.559 2.323 54856 944245 144576 305640
  17.323 18.898 2.559 2.323 52608 989209 158592 335509

Characteristics

  • Customized application – by varying the number of Locking Elements, size and quantity of clamping screws, the connection can be adapted to fit most applications concerning surface pressures, materials, hub/shaft dimensions and available mounting space.
  • Transmission of high loads – to increase the transmissible torque and axial forces up to 4 Locking Elements can be used in series.
  • Maximum reliability – no matter whether the connection is subjected to static, pulsating, dynamic or intermittent loads.
  • Simple manufacture – shaft and hub are designed without keyway. Apart from this, relatively large tolerances are admissible.
  • Easy adjustability – Locking Elements work without positive connection. So they can be adjusted at any place to any position by following the simple installation and removal instructions.
  • Backlash-free – the Locking Element connection is a mechanical shrink fit and will not wear or loosen in service provided that the maximum transmissible values for the connection are not exceeded.
  • High fatigue strength under alternating torsional stresses – as neither the shaft nor the hub have grooves the notch effect is minimized and a higher polar section modulus is given, enabling the use of smaller diameters.
  • Simple installation – in comparison to cross-press fits temperature treatments and fitting are eliminated. Screws have to be tightened with standard tools.
  • Easy removal – Locking Elements are self releasing no additional measures or auxiliary equipment is required.
  • Wear and maintenance-free – unlimited lifetime if designed and used correctly.

Mounting of Locking Element

The values for T and Fax, apply to Locking Elements installed in oiled condition.

Surface finishes

For shafts and hub bores Ra ≤ 1 μm

Required screw tension force

  • for Locking Elements solid: FA = F + F0
  • for Locking Elements slit: FA = F

n-Locking Elements

Where n-Locking Elements are used one behind the other (series), the following applies to the increase in T and Fax:

  • Tn = T1 · m
  • Faxn = Fax1 · m

Retaining the values for T and Fax it is possible to reduce F and p when using elements in series:

  • FA´n = F/m
  • PN = p/m

With 2 / 3 / 4 Locking Elements, m = 1.555 / 1.86 / 2.03

d

Element1)

Shaft

Bore

up to

38

2)E7 3)f7

h6

H7

above

38

2)E8 3)e8

h8

H8



1Approx. values, 2Inner diameter, 3Outside diameter

The fits specified have given excellent service in practical operations. Naturally, the shafts and the bores can feature other clearances. (Please contact our technical department for assistance).

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