Locking Assemblies RfN 7012.2 for Bending Loads | RINGFEDER®

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.

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Technical Data & CAD Models

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

Images & Drawings

Dimensions Dimensions
Location Location

Product Characteristics

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.

RINGFEDER® Locking Assemblies – How to Use Them?

Learn more about application and functionality of our premium-quality, high-performance RINGFEDER® Locking Assemblies in our short video.

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RINGFEDER® Locking Assemblies – How to Use Them?

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Product Paper RINGFEDER® Locking Assemblies for Bending Loads

Product Paper RINGFEDER® Locking Assemblies for Bending Loads

EN English DE German
Tech Paper Locking Assemblies for Bending Loads RINGFEDER® RfN 7012.2

Tech Paper Locking Assemblies for Bending Loads RINGFEDER® RfN 7012.2

EN English DE German
Instruction Manual Locking Assemblies RINGFEDER® RfN 7012, RfN 7012.2

Instruction Manual Locking Assemblies RINGFEDER® RfN 7012, RfN 7012.2

DE German EN English

If indicated pressures are too high for your specific application, please refer to the corresponding Tech Papers with reduced bending loads (Mb 20% to Mb 80%).

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Suitable Industry Solutions

Special Machines
Cement
Chemical
Steel
Material Handling
Pulp & Paper
Refining
Cranes & Hoists
Thermal Power Stations
Hydro Power Stations
Mining
Oil & Gas
Timber

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