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Locking Element RfN 8006 stainless steel/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 stainless steel/solid

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 4.6 7.0
  10 13 4.5 3.7 6.95 6.3 5.6 9.7
  11 14 4.5 3.7 7.5 6.9 6.4 11.7
  12 15 4.5 3.7 6.9 7.5 8.0 15.0
  13 16 4.5 3.7 6.4 8.2 9.6 18.6
  14 18 6.3 5.3 11.2 12.6 16.0 27.4
  15 19 6.3 5.3 10.7 13.5 18.4 32.6
  16 20 6.3 5.3 10.1 14.4 20.8 38.7
  17 21 6.3 5.3 9.5 15.3 23.2 45.1
  18 22 6.3 5.3 9.1 16.2 26.4 51.8
  19 24 6.3 5.3 12.6 17.1 28.8 72.8
  20 25 6.3 5.3 12.0 18 32.0 82.2
  22 26 6.3 5.3 9.0 19.8 38.4 79
  24 28 6.3 5.3 8.3 21.6 46.4 97
  25 30 6.3 5.3 9.9 22.5 49.6 136
  28 32 6.3 5.3 7.4 25.2 62.4 136
  30 35 6.3 5.3 8.5 27 72.0 201
  32 36 6.3 5.3 7.8 28.8 81.6 178
  35 40 7 6 10.1 35.6 110.4 270
  36 42 7 6 11,6 36.6 117.6 351
  38 44 7 6 11.0 38.7 130.4 393
  40 45 8 6.6 13,8 45 159.2 342
  42 48 8 6.6 15.6 47 175.2 463
  45 52 10 8.6 26.1 66 262.4 599
  48 55 10 8.6 24.6 70 298.4 692
  50 57 10 8.6 23.5 73 324 758
  55 62 10 8.6 21.8 80 392 928
  56 64 12 10.4 29.4 99 492 1080
  60 68 12 10.4 27.4 106 564 1260
  63 71 12 10.4 26.3 111 624 1400
  65 73 12 10.4 25.4 115 664 1500
  70 79 14 12.2 31.0 145 896 1960
  71 80 14 12.2 31.0 147 928 2020
  75 84 14 12.2 34.6 155 1032 2240
  80 91 17 15 48.0 203 1448 3120
  85 96 17 15 45.6 216 1632 3550
  90 101 17 15 43.4 229 1832 4000
  95 106 17 15 41.2 242 2040 4480
  100 114 21 18.7 60.7 317 2816 6360
  110 124 21 18.7 66.0 349 3400 7650
  120 134 21 18.7 60.2 380 4040 9180
  130 148 28 25.3 96.2 558 6440 13870
  140 158 28 25.3 89.0 600 7480 16190
  150 168 28 25.3 84.5 643 8560 18640
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 3.4 5.2
  0.394 0.512 0.177 0.146 1551 1416 4.1 7.2
  0.433 0.551 0.177 0.146 1686 1551 4.7 8.6
  0.472 0.591 0.177 0.146 1551 1686 5.9 11.1
  0.512 0.630 0.177 0.146 1439 1844 7.1 13.7
  0.551 0.709 0.248 0.209 2518 2833 11.8 20.2
  0.591 0.748 0.248 0.209 2406 3035 13.6 24
  0.630 0.787 0.248 0.209 2271 3237 15.3 29
  0.669 0.827 0.248 0.209 2136 3440 17.1 33
  0.709 0.866 0.248 0.209 2046 3642 19.5 38
  0.748 0.945 0.248 0.209 2833 3844 21.2 54
  0.787 0.984 0.248 0.209 2698 4047 24 61
  0.866 1.024 0.248 0.209 2023 4451 28 58
  0.945 1.102 0.248 0.209 1866 4856 34 72
  0.984 1.181 0.248 0.209 2226 5058 37 100
  1.102 1.260 0.248 0.209 1664 5665 46 100
  1.181 1.378 0.248 0.209 1911 6070 53 148
  1.260 1.417 0.248 0.209 1754 6475 60 131
  1.378 1.575 0.276 0.236 2271 8004 81 199
  1.417 1.654 0.276 0.236 2698 8228 87 259
  1.496 1.732 0.276 0.236 2473 8701 96 290
  1.575 1.772 0.315 0.260 3147 10117 117 252
  1.654 1.890 0.315 0.260 3507 10567 129 342
  1.772 2.047 0.394 0.339 5868 14838 194 442
  1.890 2.165 0.394 0.339 5531 15737 220 510
  1.969 2.244 0.394 0.339 5283 16412 239 559
  2.165 2.441 0.394 0.339 4901 17986 289 685
  2.205 2.520 0.472 0.409 6610 22257 363 797
  2.362 2.677 0.472 0.409 6160 23831 416 929
  2.480 2.795 0.472 0.409 5913 24955 460 1033
  2.559 2.874 0.472 0.409 5710 25854 490 1106
  2.756 3.110 0.551 0.480 6969 32599 661 1446
  2.795 3.150 0.551 0.480 6969 33049 685 1490
  2.953 3.307 0.551 0.480 7779 34847 761 1652
  3.150 3.583 0.669 0.591 10791 45638 1068 2301
  3.346 3.780 0.669 0.591 10252 48561 1204 2619
  3.543 3.976 0.669 0.591 9757 51484 1351 2951
  3.740 4.173 0.669 0.591 9263 54406 1505 3305
  3.937 4.488 0.827 0.736 13647 71268 2077 4691
  4.331 4.882 0.827 0.736 14838 78462 2508 5643
  4.724 5.276 0.827 0.736 13534 85432 2980 6771
  5.118 5.827 1.102 0.996 21628 125450 4750 10231
  5.512 6.220 1.102 0.996 20009 134892 5518 11942
  5.906 6.614 1.102 0.996 18997 144559 6314 13750

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 und 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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