Locking Assemblies RfN 7012 | RINGFEDER®

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.

This series is also available in true inch sizes.

Product 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.

Technical Data & CAD Models

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CAD
d
mm
D
mm
L
mm
L1
mm
L3
mm
T
Nm
pW
N/mm2
pN
N/mm2
DG
mm
TA
Nm
DN min bei Rp0,2 400 N/mm2
mm
Tmax
Nm
19 47 27,5 20 17 306 265 107 6 17 56 356
20 47 27,5 20 17 321 251 107 6 17 56 374
22 47 27,5 20 17 351 227 106 6 17 56 412
24 50 27,5 20 17 429 232 112 6 17 60 506
25 50 27,5 20 17 446 223 111 6 17 60 526
28 55 27,5 20 17 496 197 100 6 17 65 590
30 55 27,5 20 17 529 183 100 6 17 65 632
32 60 27,5 20 17 749 228 122 6 17 73 899
35 60 27,5 20 17 815 208 121 6 17 73 983
38 65 27,5 20 17 1101 238 139 6 17 81 1334
40 65 27,5 20 17 1154 225 139 6 17 81 1404
42 75 33,5 24 20 1768 266 149 8 41 95 2158
45 75 33,5 24 20 1886 247 148 8 41 95 2312
48 80 33,5 24 20 2004 231 138 8 41 100 2466
50 80 33,5 24 20 2082 221 138 8 41 100 2568
55 85 33,5 24 20 2656 233 151 8 41 108 3296
60 90 33,5 24 20 2881 212 142 8 41 113 3596
65 95 33,5 24 20 3550 223 153 8 41 121 4452
70 110 39,5 28 24 5432 245 156 10 83 141 6844
75 115 39,5 28 24 5795 228 149 10 83 145 7333
80 120 39,5 28 24 6156 213 142 10 83 150 7822
85 125 39,5 28 24 7447 228 155 10 83 159 9498
90 130 39,5 28 24 7857 214 148 10 83 164 10057
95 135 39,5 28 24 9298 228 160 10 83 173 11942
100 145 47 33 26 11126 227 157 12 145 185 14335
110 155 47 33 26 12166 205 146 12 145 195 15768
120 165 47 33 26 15085 214 155 12 145 210 19659
130 180 52 38 34 20326 188 136 12 145 222 26621
140 190 52 38 34 23967 191 141 12 145 237 31536
150 200 52 38 34 27893 193 145 12 145 250 36860
160 210 52 38 34 32102 196 149 12 145 265 42594
170 225 60 44 38 39326 190 144 14 230 281 52377
180 235 60 44 38 45262 195 149 14 230 300 60499
190 250 68 52 46 55552 177 135 14 230 308 74504
200 260 68 52 46 62452 175 135 14 230 322 84027
220 285 74 56 50 79874 175 135 16 355 351 108110
240 305 74 56 50 99995 184 145 16 355 381 136082
260 325 74 56 50 122159 192 153 16 355 412 167078
280 355 86,5 66 60 148773 168 132 18 485 435 204423
300 375 86,5 66 60 178553 175 140 18 485 465 246403
320 405 100,5 78 72 246382 177 140 20 690 502 341382
340 425 100,5 78 72 260791 166 133 20 690 521 362719
360 455 116 90 84 336729 164 130 22 930 555 470012
380 475 116 90 84 371687 147 119 22 930 574 522235
400 495 116 90 84 371687 147 119 22 930 594 522235
420 515 116 90 84 432315 155 126 22 930 625 609275
440 545 130 102 96 531403 152 122 24 1200 657 751102
460 565 130 102 96 554016 145 118 24 1200 677 785243
480 585 130 102 96 605396 145 119 24 1200 702 860354
500 605 130 102 96 658967 146 120 24 1200 727 938878
520 630 130 102 96 699186 143 118 24 1200 754 998625
540 650 130 102 96 724367 137 114 24 1200 774 1037033
560 670 130 102 96 799456 141 118 24 1200 802 1147138
580 690 130 102 96 860618 141 119 24 1200 827 1237612
600 710 130 102 96 888410 136 115 24 1200 846 1280288
620 730 130 102 96 952790 137 117 24 1200 871 1375883
640 750 130 102 96 1019329 138 117 24 1200 897 1474892
660 770 130 102 96 1088021 138 118 24 1200 922 1577315
680 790 130 102 96 1118902 134 115 24 1200 941 1625113
700 810 130 102 96 1231849 139 120 24 1200 973 1792404
720 830 130 102 96 1264816 135 117 24 1200 992 1843615
740 850 130 102 96 1340983 135 118 24 1200 1017 1957987
760 870 130 102 96 1419285 136 119 24 1200 1043 2075774
780 890 130 102 96 1476995 134 118 24 1200 1065 2163687
800 910 130 102 96 1535740 133 117 24 1200 1088 2253307
820 930 130 102 96 1619333 133 117 24 1200 1111 2379629
840 950 130 102 96 1705048 134 118 24 1200 1137 2509365
860 970 130 102 96 1792882 134 119 24 1200 1163 2642515
880 990 130 102 96 1882830 134 119 24 1200 1187 2779079
900 1010 130 102 96 1948904 133 118 24 1200 1209 2880649
920 1030 130 102 96 2016005 132 118 24 1200 1233 2983925
940 1050 130 102 96 2111197 132 118 24 1200 1257 3129024
960 1070 130 102 96 2208493 132 119 24 1200 1283 3277538
980 1090 130 102 96 2279745 131 118 24 1200 1305 3387643
1000 1110 130 102 96 2352018 130 117 24 1200 1326 3499454
CAD d
inch
D
inch
L
inch
L1
inch
L3
inch
T
ft-lbs
pW
psi
pN
psi
DG
mm
TA
ft-lbs
DN min bei Rp0,2 400 N/mm2
inch
Tmax
ft-lbs
  3/4 1.850 1.083 0.787 0.669 225 35000 14200 6 13 2.227 261
  1 1.969 1.083 0.787 0.669 337 33000 16800 6 13 2.454 391
  1 1/8 2.165 1.083 0.787 0.669 424 30000 15600 6 13 2.655 492
  1 3/16 2.159 1.108 0.813 0.669 445 31000 17100 6 13 2.702 516
  1 1/4 2.362 1.083 0.787 0.669 459 35000 18600 6 13 3.017 532
  1 3/8 2.365 1.071 0.776 0.669 622 32000 18700 6 13 3.025 722
  1 7/16 2.559 1.083 0.787 0.669 748 35000 19700 6 13 3.318 868
  1 1/2 2.559 1.083 0.787 0.669 782 33500 19700 6 13 3.318 907
  1 5/8 2.953 1.319 0.945 0.787 1273 39000 21500 8 30 3.926 1477
  1 11/16 2.953 1.319 0.945 0.787 1320 34000 19500 8 30 3.819 1531
  1 3/4 2.953 1.319 0.945 0.787 1368 36000 21400 8 30 3.921 1587
  1 7/8 3.150 1.319 0.945 0.787 1454 34000 20300 8 30 4.119 1687
  1 15/16 3.150 1.319 0.945 0.787 1498 32000 19700 8 30 4.085 1738
  2 3.346 1.319 0.945 0.787 1808 37000 22200 8 30 4.493 2097
  2 1/8 3.346 1.319 0.945 0.787 1919 35000 22300 8 30 4.499 2226
  2 3/16 3.543 1.319 0.945 0.787 1971 34000 21000 8 30 4.678 2286
  2 1/4 3.543 1.319 0.945 0.787 2023 32000 20400 8 30 4.639 2347
  2 3/8 3.531 1.370 0.996 0.787 2127 30500 20600 8 30 4.636 2467
  2 7/16 3.740 1.319 0.945 0.787 2497 34000 22200 8 30 5.022 2897
  2 1/2 3.740 1.319 0.945 0.787 2556 33000 22100 8 30 5.015 2965
  2 9/16 3.737 1.333 0.959 0.787 2617 32000 22000 8 30 5.004 3036
  2 5/8 4.331 1.555 1.102 0.945 3775 37000 22500 10 61 5.840 4379
  2 11/16 4.331 1.555 1.102 0.945 3866 36000 22400 10 61 5.832 4485
  2 3/4 4.337 1.532 1.079 0.945 4017 36000 22900 10 61 5.881 4660
  2 7/8 4.528 1.555 1.102 0.945 4175 34500 22000 10 61 6.063 4843
  2 15/16 4.528 1.555 1.102 0.945 4262 34000 22100 10 61 6.071 4944
  3 4.724 1.555 1.102 0.945 4332 33000 21000 10 61 6.237 5025
  3 1/8 4.724 1.555 1.102 0.945 4515 31000 20600 10 61 6.203 5237
  3 1/4 4.921 1.555 1.102 0.945 5355 33000 21800 10 61 6.571 6212
  3 3/8 4.921 1.555 1.102 0.945 5558 34000 23400 10 61 6.720 6447
  3 7/16 5.118 1.555 1.102 0.945 5601 32000 21500 10 61 6.805 6497
  3 1/2 5.118 1.555 1.102 0.945 5706 31000 21200 10 61 6.776 6619
  3 3/4 5.305 1.594 1.142 0.945 6914 34000 24100 10 61 7.317 8020
  3 15/16 5.708 1.852 1.301 1.024 8402 33000 22800 12 107 7.729 9746
  4 5.843 1.850 1.299 1.024 8489 32000 22000 12 107 7.823 9847
  4 7/16 6.496 1.850 1.299 1.024 10498 34000 23300 12 107 8.859 12178
  4 1/2 6.496 1.850 1.299 1.024 10652 33000 22900 12 107 8.809 12356
  4 15/16 7.087 2.047 1.496 1.339 14493 29000 20300 12 107 9.267 16812
  5 7.087 2.047 1.496 1.339 14672 29000 20500 12 107 9.293 17020
  5 1/2 7.492 2.000 1.449 1.339 17804 29000 21300 12 107 9.934 20653
  6 8.268 2.047 1.496 1.339 22762 30500 22200 12 107 11.102 26404
  6 1/2 8.858 2.362 1.732 1.496 28336 29000 21300 14 170 11.745 32870
  7 9.252 2.362 1.732 1.496 33220 29000 22000 14 170 12.388 38535
  7 1/2 9.823 2.756 2.126 1.811 41369 26500 20300 14 170 12.844 47988
  7 7/8 10.235 2.681 2.051 1.811 46707 26500 20400 14 170 13.402 54180

Downloads

Product Paper RINGFEDER® Locking Assemblies

Product Paper RINGFEDER® Locking Assemblies

Tech Paper Locking Assemblies RINGFEDER® RfN 7012

Tech Paper Locking Assemblies RINGFEDER® RfN 7012

Instruction Manual Locking Assemblies RINGFEDER® RfN 7012, RfN 7012.2

Instruction Manual Locking Assemblies RINGFEDER® RfN 7012, RfN 7012.2

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