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Locking Assembly RfN 7012

The original RINGFEDER® Locking Assemblies featuring double-tapered thrust rings with self-releasing tapers. They bridge relatively large fit clearances, are easy to install, adjust or remove, but are not self-centering. A pre-centering hub section is usually required.

RINGFEDER® RfN 7012

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metric inch
CAD d D L L1 L3 T pW pN TA DN min bei 400 N/mm2 Tmax
  mm mm mm mm mm Nm N/mm2 N/mm2 Nm mm Nm
  19 47 27.5 20 17 306 265 107 17 56 356
  20 47 27.5 20 17 321 251 107 17 56 374
  22 47 27.5 20 17 351 227 106 17 56 412
  24 50 27.5 20 17 429 232 112 17 60 506
  25 50 27.5 20 17 446 223 111 17 60 526
  28 55 27.5 20 17 496 197 100 17 65 590
  30 55 27.5 20 17 529 183 100 17 65 632
  32 60 27.5 20 17 749 228 122 17 73 899
  35 60 27.5 20 17 815 208 121 17 73 983
  38 65 27.5 20 17 1101 238 139 17 81 1334
  40 65 27.5 20 17 1154 225 139 17 81 1404
  42 75 33.5 24 20 1768 266 149 41 95 2158
  45 75 33.5 24 20 1886 247 148 41 95 2312
  48 80 33.5 24 20 2004 231 138 41 100 2466
  50 80 33.5 24 20 2082 221 138 41 100 2568
  55 85 33.5 24 20 2656 233 151 41 108 3296
  60 90 33.5 24 20 2881 212 142 41 113 3596
  65 95 33.5 24 20 3550 223 153 41 121 4452
  70 110 39.5 28 24 5432 245 156 83 141 6844
  75 115 39.5 28 24 5795 228 149 83 145 7333
  80 120 39.5 28 24 6156 213 142 83 150 7822
  85 125 39.5 28 24 7447 228 155 83 159 9498
  90 130 39.5 28 24 7857 214 148 83 164 10057
  95 135 39.5 28 24 7857 214 148 83 173 10057
  100 145 47 33 26 11126 227 157 145 185 14335
  110 155 47 33 26 12166 205 146 145 195 15768
  120 165 47 33 26 15085 214 155 145 210 19659
  130 180 52 38 34 20326 188 136 145 222 26621
  140 190 52 38 34 23967 191 141 145 237 31536
  150 200 52 38 34 27893 193 145 145 250 36860
  160 210 52 38 34 32102 196 149 145 265 42594
  170 225 60 44 38 39326 190 144 230 281 52377
  180 235 60 44 38 45262 195 149 230 300 60499
  190 250 68 52 46 55552 177 135 230 308 74504
  200 260 68 52 46 62452 175 135 230 322 84027
  220 285 74 56 50 79874 175 135 355 351 108110
  240 305 74 56 50 99995 184 145 355 381 136082
  260 325 74 56 50 122159 192 153 355 412 167078
  280 355 86.5 66 60 148773 168 132 485 435 204423
  300 375 86.5 66 60 178553 175 140 485 465 246403
  320 405 100.5 78 72 246382 177 140 690 502 341382
  340 425 100.5 78 72 260791 166 133 690 521 362719
  360 455 116 90 84 336729 164 130 930 555 470012
  380 475 116 90 84 371687 147 119 930 574 522235
  400 495 116 90 84 371687 147 119 930 594 522235
  420 515 116 90 84 432315 155 126 930 625 609275
  440 545 130 102 96 531403 152 122 1200 657 751102
  460 565 130 102 96 554016 145 118 1200 677 785243
  480 585 130 102 96 605396 145 119 1200 702 860354
  500 605 130 102 96 658967 146 120 1200 727 938878
  520 630 130 102 96 699186 143 118 1200 754 998625
  540 650 130 102 96 724367 137 114 1200 774 1037033
  560 670 130 102 96 799456 141 118 1200 802 1147138
  580 690 130 102 96 860618 141 119 1200 827 1237612
  600 710 130 102 96 888410 136 115 1200 846 1280288
  620 730 130 102 96 952790 137 117 1200 871 1375883
  640 750 130 102 96 1019329 138 117 1200 897 1474892
  660 770 130 102 96 1088021 138 118 1200 922 1577315
  680 790 130 102 96 1118902 134 115 1200 941 1625113
  700 810 130 102 96 1231849 139 120 1200 973 1792404
  720 830 130 102 96 1264816 135 117 1200 992 1843615
  740 850 130 102 96 1340983 135 118 1200 1017 1957987
  760 870 130 102 96 1419285 136 119 1200 1043 2075774
  780 890 130 102 96 1476995 134 118 1200 1065 2163687
  800 910 130 102 96 1535740 133 117 1200 1088 2253307
  820 930 130 102 96 1619333 133 117 1200 1111 2379629
  840 950 130 102 96 1705048 134 118 1200 1137 2509365
  860 970 130 102 96 1792882 134 119 1200 1163 2642515
  880 990 130 102 96 1882830 134 119 1200 1187 2779079
  900 1010 130 102 96 1948904 133 118 1200 1209 2880649
  920 1030 130 102 96 2016005 132 118 1200 1233 2983925
  940 1050 130 102 96 2111197 132 118 1200 1257 3129024
  960 1070 130 102 96 2208493 132 119 1200 1283 3277538
  980 1090 130 102 96 2279745 131 118 1200 1305 3387643
  1000 1110 130 102 96 2352018 130 117 1200 1326 3499454
CAD d D L L1 L3 T pW pN TA DN min bei 400 N/mm2 Tmax
  inch inch inch inch inch ft-lbs psi psi ft-lbs inch ft-lbs
  0.748 1.85 1.083 0.787 0.669 226 38406 15507 13 2.205 263
  0.787 1.85 1.083 0.787 0.669 237 36377 15507 13 2.205 276
  0.866 1.85 1.083 0.787 0.669 259 32899 15362 13 2.205 304
  0.945 1.969 1.083 0.787 0.669 316 33623 16232 13 2.362 373
  0.984 1.969 1.083 0.787 0.669 329 32319 16087 13 2.362 388
  1.102 2.165 1.083 0.787 0.669 366 28551 14493 13 2.559 435
  1.181 2.165 1.083 0.787 0.669 390 26522 14493 13 2.559 466
  1.26 2.362 1.083 0.787 0.669 552 33043 17681 13 2.874 663
  1.378 2.362 1.083 0.787 0.669 601 30145 17536 13 2.874 725
  1.496 2.559 1.083 0.787 0.669 812 34493 20145 13 3.189 984
  1.575 2.559 1.083 0.787 0.669 851 32609 20145 13 3.189 1036
  1.654 2.953 1.319 0.945 0.787 1304 38551 21594 30 3.74 1592
  1.772 2.953 1.319 0.945 0.787 1391 35797 21449 30 3.74 1705
  1.89 3.15 1.319 0.945 0.787 1478 33478 20000 30 3.937 1819
  1.969 3.15 1.319 0.945 0.787 1536 32029 20000 30 3.937 1894
  2.165 3.346 1.319 0.945 0.787 1959 33768 21884 30 4.252 2431
  2.362 3.543 1.319 0.945 0.787 2125 30725 20580 30 4.449 2652
  2.559 3.74 1.319 0.945 0.787 2618 32319 22174 30 4.764 3284
  2.756 4.331 1.555 1.102 0.945 4006 35507 22609 61 5.551 5048
  2.953 4.528 1.555 1.102 0.945 4274 33043 21594 61 5.709 5409
  3.15 4.724 1.555 1.102 0.945 4540 30870 20580 61 5.906 5769
  3.346 4.921 1.555 1.102 0.945 5493 33043 22464 61 6.26 7005
  3.543 5.118 1.555 1.102 0.945 5795 31014 21449 61 6.457 7418
  3.74 5.315 1.555 1.102 0.945 5795 31014 21449 61 6.811 7418
  3.937 5.709 1.85 1.299 1.024 8206 32899 22754 107 7.283 10573
  4.331 6.102 1.85 1.299 1.024 8973 29710 21159 107 7.677 11630
  4.724 6.496 1.85 1.299 1.024 11126 31014 22464 107 8.268 14500
  5.118 7.087 2.047 1.496 1.339 14992 27246 19710 107 8.74 19635
  5.512 7.48 2.047 1.496 1.339 17677 27681 20435 107 9.331 23260
  5.906 7.874 2.047 1.496 1.339 20573 27971 21014 107 9.843 27187
  6.299 8.268 2.047 1.496 1.339 23678 28406 21594 107 10.433 31416
  6.693 8.858 2.362 1.732 1.496 29006 27536 20870 170 11.063 38632
  7.087 9.252 2.362 1.732 1.496 33384 28261 21594 170 11.811 44622
  7.48 9.843 2.677 2.047 1.811 40974 25652 19565 170 12.126 54952
  7.874 10.236 2.677 2.047 1.811 46063 25362 19565 170 12.677 61976
  8.661 11.22 2.913 2.205 1.969 58913 25362 19565 262 13.819 79739
  9.449 12.008 2.913 2.205 1.969 73754 26667 21014 262 15 100370
  10.236 12.795 2.913 2.205 1.969 90101 27826 22174 262 16.22 123232
  11.024 13.976 3.406 2.598 2.362 109731 24348 19130 358 17.126 150777
  11.811 14.764 3.406 2.598 2.362 131696 25362 20290 358 18.307 181740
  12.598 15.945 3.957 3.071 2.835 181724 25652 20290 509 19.764 251794
  13.386 16.732 3.957 3.071 2.835 192352 24058 19275 509 20.512 267531
  14.173 17.913 4.567 3.543 3.307 248362 23768 18841 686 21.85 346668
  14.961 18.701 4.567 3.543 3.307 274146 21304 17246 686 22.598 385186
  15.748 19.488 4.567 3.543 3.307 274146 21304 17246 686 23.386 385186
  16.535 20.276 4.567 3.543 3.307 318863 22464 18261 686 24.606 449384
  17.323 21.457 5.118 4.016 3.78 391948 22029 17681 885 25.866 553992
  18.11 22.244 5.118 4.016 3.78 408627 21014 17101 885 26.654 579173
  18.898 23.031 5.118 4.016 3.78 446523 21014 17246 885 27.638 634573
  19.685 23.819 5.118 4.016 3.78 486036 21159 17391 885 28.622 692490
  20.472 24.803 5.118 4.016 3.78 515700 20725 17101 885 29.685 736558
  21.26 25.591 5.118 4.016 3.78 534273 19855 16522 885 30.472 764886
  22.047 26.378 5.118 4.016 3.78 589656 20435 17101 885 31.575 846097
  22.835 27.165 5.118 4.016 3.78 634768 20435 17246 885 32.559 912828
  23.622 27.953 5.118 4.016 3.78 655266 19710 16667 885 33.307 944304
  24.409 28.74 5.118 4.016 3.78 702751 19855 16957 885 34.291 1014813
  25.197 29.528 5.118 4.016 3.78 751828 20000 16957 885 35.315 1087839
  25.984 30.315 5.118 4.016 3.78 802494 20000 17101 885 36.299 1163383
  26.772 31.102 5.118 4.016 3.78 825271 19420 16667 885 37.047 1198638
  27.559 31.89 5.118 4.016 3.78 908577 20145 17391 885 38.307 1322027
  28.346 32.677 5.118 4.016 3.78 932893 19565 16957 885 39.055 1359799
  29.134 33.465 5.118 4.016 3.78 989071 19565 17101 885 40.039 1444156
  29.921 34.252 5.118 4.016 3.78 1046825 19710 17246 885 41.063 1531033
  30.709 35.039 5.118 4.016 3.78 1089390 19420 17101 885 41.929 1595875
  31.496 35.827 5.118 4.016 3.78 1132719 19275 16957 885 42.835 1661976
  32.283 36.614 5.118 4.016 3.78 1194375 19275 16957 885 43.74 1755148
  33.071 37.402 5.118 4.016 3.78 1257596 19420 17101 885 44.764 1850837
  33.858 38.189 5.118 4.016 3.78 1322379 19420 17246 885 45.787 1949045
  34.646 38.976 5.118 4.016 3.78 1388723 19420 17246 885 46.732 2049771
  35.433 39.764 5.118 4.016 3.78 1437457 19275 17101 885 47.598 2124686
  36.22 40.551 5.118 4.016 3.78 1486949 19130 17101 885 48.543 2200859
  37.008 41.339 5.118 4.016 3.78 1557160 19130 17101 885 49.488 2307880
  37.795 42.126 5.118 4.016 3.78 1628922 19130 17246 885 50.512 2417420
  38.583 42.913 5.118 4.016 3.78 1681476 18986 17101 885 51.378 2498630
  39.37 43.701 5.118 4.016 3.78 1734782 18841 16957 885 52.205 2581099

Characteristics

  • Slimmest design, especially suitable for applications where space is limited. The Locking Assembly RfN 7012 compensates small tolerance deviations and compensates small mounting errors.
  • Large transmittable forces and moments – several Locking Assemblies RfN 7012 can be placed one behind the other. The transmissible torque and axial forces are added - please take in this respect consulting with our technical experts.
  • Bending moment and radial loads – combined loads can be transmitted. (Please contact our technical department for assistance).
  • Easy installation – RfN 7012 Locking Assemblies can bridge large clearances without the loss of transmission values.
  • Low risk to contamination – during the tightening process the functional surfaces of the device and connection are pressed together generating a surface pressure that does not allow the ingress of contamination.
  • Free from wear – the Locking Assembly RfN 7012 works without moving parts on shaft and hub, through this, abrasive wear and backlash are avoided. Thus, RfN 7012 can be repeatedly clamped and released.

Example applications

  • chain wheels
  • levers
  • pulleys
  • slip-on gear mechanisms
  • belt drums
  • running wheels
  • cable sheaves

Mounting of Locking Assembly

The Locking Assemblies are supplied slightly oiled and ready-to-use. The values for T, Fax, pW and pN apply to Locking Assemblies in delivery condition.

Surface finishes

For shafts and hub bores Ra = 3,2 μm

Tolerances

We recommend the following mounting tolerances

Shaft: k9-h9; Hub: N9-H9
Max. admissible Shaft: k11-h11; Hub: N11-H11

To avoid excessive deformations of the relatively thickwalled thrust rings, the Locking Assembly should be located as symmetrically as possible between shaft and hub bore. If the shaft is smaller than nominal d, the bore should exceed nominal D to the same extent and vice versa. The concentricity quality is determined by the direct centering between shaft and hub.

Arrangement of several Locking Assemblies RfN 7012

If several Locking Assemblies are to be installed the transmission values of the table can be added when the Locking Assemblies are located within a distance of 4·L.

Change of screw tightening torques

The Locking Assemblies are equipped with 12.9 grade screws. A reduction of the screw tightening torque is possible. The lowest allowable screw tightening torque results from the multiplication of the TA-value by 0,5. There is an approximate linear relationship between T, TA , Fax, pW and pN.

Auxiliary threads

To facilitate removal, the front thrust rings have auxiliary threads.

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