• Both CurrentPage.Property["TopNavigationRoot"] Session["TopNavigationRoot"] are null!

Locking Assembly RfN 7012.2 for bending loads

The new Locking Assembly series RINGFEDER® RfN 7012.2 is specially designed to fulfil the requirements of constantly increasing bending moments for conveyor pulleys.

The challenge was to develop a product with the same dimensions as the standard RINGFEDER® RfN 7012 to fit into existing end discs – Attention: yield point of end disc has to be checked – so that also material handling equipment at hand can be upgraded. At the same time the Locking Assembly should carry a multiple of the bending moments of the standard RINGFEDER® RfN 7012.

If the pressures are too high for the application please note datasheets Mb 20% - Mb 80% with reduced bending moments.

RINGFEDER® RfN 7012.2

metric inch
CAD d D L L1 T Fax pW TAred. Mbmax. Tres bei Mbmax pWmax bei Mbmax pNmax bei Mbmax
  mm mm mm mm Nm kN N/mm2 Nm Nm Nm N/mm2 N/mm2
  100 145 47  33 10409 208 212 125 10300 1502 406 280
  110 155 47  33 11382 207 192 125 11200 2027 383 272
  120 165 47  33 14249 237 202 125 12880 6095 404 294
  130 180 52  38 19455 299 180 125 16400 10467 359 259
  140 190 52  38 25246 361 201 125 9700 23308 299 221
  150 200 52  38 26933 359 187 125 14690 22574 326 244
  160 210 52  38 31101 389 190 125 13380 28075 308 235
  170 225 60  44  36243 426 175 190 28080 22914 350 265
  180 235 60  44  41880 465 180 190 28860 30348 350 268
  190 250 68  52  51719 544 165 190 37000 36137 312 237
  200 260 68  52  56277 563 162 190 40180 39404 314 241
  220 285 74  56  74592 678 164 295 50440 54952 313 241
  240 305 74  56  84169 701 155 295 57100 61838 310 244
  260 325 74  56  104686 805 164 295 48910 92558 287 229
  280 355 86,5 66  131586 940 148 405 89170 96766 297 234
  300 375 86,5 66  145219 968 143 405 91850 112482 285 228
  320 405 100,5 78  201713 1261 145 580 139400 145793 290 229
  340 425 100,5 78  220626 1298 141 580 143500 167582 281 225
  360 455 116  90  293404 1630 143 780 178400 232936 267 211
  380 475 116  90  318305 1675 139 780 204700 243754 274 219
  400 495 116  90  344106 1721 136 780 217320 266798 272 220
  420 515 116  90  391995 1867 140 780 195820 339580 257 210
  440 545 130  102  478752 2176 137 1000 251950 407093 248 200
  460 565 130  102  512615 2229 134 1000 283500 427085 254 206
  480 585 130  102  547520 2281 131 1000 315100 447762 259 212
  500 605 130  102  598054 2392 132 1000 304200 514908 250 207
  520 630 130  102  635586 2445 130 1000 345050 533770 259 214
  540 650 130  102  674155 2497 128 1000 355400 572866 256 212
  560 670 130  102  729980 2607 129 1000 365700 631770 255 213
  580 690 130  102  787923 2717 129 1000 354800 703519 248 209
  600 710 130  102  830673 2769 128 1000 386400 735331 253 213
  620 730 130  102  874450 2821 126 1000 401500 776828 251 214
  640 750 130  102  956024 2988 129 1000 364600 883770 240 204
  660 770 130  102  1021852 3097 130 1000 353700 958686 234 200
  680 790 130  102  1050855 3091 126 1000 357760 988081 228 196
  700 810 130  102  1079804 3085 122 1000 357770 1018812 221 191
  720 830 130  102  1108702 3080 118 1000 354670 1050443 214 185
  740 850 130  102  1179681 3188 119 1000 367670 1120922 215 188
  760 870 130  102  1252745 3297 120 1000 379250 1193960 217 189
  780 890 130  102  1305758 3348 119 1000 385650 1247509 215 188
  800 910 130  102  1359784 3399 117 1000 392150 1302011 213 187
CAD d D L L1 T Fax pW TAred. Mbmax. Tres bei Mbmax pWmax bei Mbmax pNmax bei Mbmax
  inch inch inch inch ft-lbs lbs psi ft-lbs ft-lbs ft-lbs psi psi
  3.937 5.709 1.850 1.299 7677 46408 30725 92 7597 1108 58841 40580
  4.331 6.102 1.850 1.299 8395 46185 27826 92 8261 1495 55507 39420
  4.724 6.496 1.850 1.299 10510 52878 29275 92 9500 4496 58551 42609
  5.118 7.087 2.047 1.496 14349 66711 26087 92 12096 7720 52029 37536
  5.512 7.480 2.047 1.496 18620 81156 29174 92 7154 17191 43398 32077
  5.906 7.874 2.047 1.496 19865 80098 27101 92 10835 16650 47246 35362
  6.299 8.268 2.047 1.496 22939 86792 27536 92 9869 20707 44638 34058
  6.693 8.858 2.362 1.732 26732 95047 25362 140 20711 16901 50725 38406
  7.087 9.252 2.362 1.732 30890 103748 26087 140 21286 22384 50725 38841
  7.480 9.843 2.677 2.047 38146 121374 23913 140 27290 26654 45217 34348
  7.874 10.236 2.677 2.047 41508 125614 23478 140 29636 29063 45507 34928
  8.661 11.220 2.913 2.205 55017 151272 23768 218 37203 40531 45362 34928
  9.449 12.008 2.913 2.205 62081 156403 22464 218 42115 45610 44928 35362
  10.236 12.795 2.913 2.205 77213 179607 23768 218 36075 68268 41594 33188
  11.024 13.976 3.406 2.598 97054 209728 21449 299 65769 71372 43043 33913
  11.811 14.764 3.406 2.598 107109 215975 20725 299 67746 82964 41304 33043
  12.598 15.945 3.957 3.071 148778 281348 21014 428 102818 107533 42029 33188
  13.386 16.732 3.957 3.071 162728 289603 20435 428 105842 123604 40725 32609
  14.173 17.913 4.567 3.543 216407 363677 20725 575 131583 171807 38696 30580
  14.961 18.701 4.567 3.543 234773 373717 20145 575 150981 179786 39710 31739
  15.748 19.488 4.567 3.543 253803 383980 19710 575 160289 196783 39420 31884
  16.535 20.276 4.567 3.543 289125 416555 20290 575 144431 250465 37246 30435
  17.323 21.457 5.118 4.016 353114 485498 19855 738 185831 300260 35942 28986
  18.110 22.244 5.118 4.016 378090 497323 19420 738 209102 315006 36812 29855
  18.898 23.031 5.118 4.016 403835 508925 18986 738 232409 330257 37536 30725
  19.685 23.819 5.118 4.016 441108 533690 19130 738 224369 379782 36232 30000
  20.472 24.803 5.118 4.016 468790 545515 18841 738 254499 393694 37536 31014
  21.260 25.591 5.118 4.016 497238 557117 18551 738 262133 422530 37101 30725
  22.047 26.378 5.118 4.016 538413 581660 18696 738 269730 465976 36957 30870
  22.835 27.165 5.118 4.016 581150 606203 18696 738 261691 518896 35942 30290
  23.622 27.953 5.118 4.016 612681 617805 18551 738 284998 542359 36667 30870
  24.409 28.740 5.118 4.016 644970 629407 18261 738 296135 572967 36377 31014
  25.197 29.528 5.118 4.016 705136 666667 18696 738 268919 651844 34783 29565
  25.984 30.315 5.118 4.016 753689 690986 18841 738 260879 707100 33913 28986
  26.772 31.102 5.118 4.016 775081 689647 18261 738 263874 728781 33043 28406
  27.559 31.890 5.118 4.016 796433 688309 17681 738 263881 751447 32029 27681
  28.346 32.677 5.118 4.016 817747 687193 17101 738 261595 774777 31014 26812
  29.134 33.465 5.118 4.016 870100 711290 17246 738 271183 826761 31159 27246
  29.921 34.252 5.118 4.016 923990 735609 17391 738 279724 880631 31449 27391
  30.709 35.039 5.118 4.016 963090 746988 17246 738 284445 920128 31159 27246
  31.496 35.827 5.118 4.016 1002938 758367 16957 738 289239 960327 30870 27101

NEW

  • The new Locking Assembly series RINGFEDER® RfN 7012.2 is specially designed to fulfil the requirements of constantly increasing bending moments for conveyor pulleys.
  • The challenge was to develop a product with the same dimensions as the standard RINGFEDER® RfN 7012 to fit into existing end discs – yield point of end disc has to be checked – so that also material handling equipment at hand can be upgraded. At the same time the Locking Assembly should carry a multiple of the bending moments of the standard RINGFEDER® RfN 7012.
  • To comply with these requirements, we have collected the experiences of our customers and our knowledges of supplying to the market of heavy industry for more than 90 years. The result is the brand new RINGFEDER® RfN 7012.2.
  • A special bolt for type RfN 7012.2 has been developed by RINGFEDER for the increased requirements occurring when subject to loading by bending moments. These special bolts guarantee loadings above strength class 12.9 at simultaneous higher expansion with regard to tensile strength and yield strength. These bolts were manufactured specially for RINGFEDER with qualified steel analysis. Every bolt is labelled with RPT-B and the batch number. This allows every bolt to be traced back to manufacture. The benefit of this bolt is the considerably increased fracture resistance under additional bending stress.

Explanation to table

A bending moment, created by radial forces, results in an additional load for the Locking Assembly, shaft and hub. This load creates an additional pressure, works in rotation and has to be superpositioned with the pressure resulting from the Locking Assembly. For a viable connection, a minimum surface pressure at the contact areas between Locking Assembly, shaft and hub must be maintained, as soon as shaft and hub have to take up the maximal pressures. Additionally, the listed torque values (T) have been reduced due to the additional bending moments. To achieve lower stresses for the Locking Assemblies the screw tightening torques (TA) have also been reduced.

Login required

Please log in now to use the requested service

© RINGFEDER POWER TRANSMISSION