Barrel Couplings TNK TKVO | RINGFEDER®

Performance and Application Optimized Type Made of High-Strength Material

  • 18 Sizes
  • Construction acc. to SEB 666212
  • Bore Diameter d1: 20-440 mm (0.787-17.323 inch)
  • Outer Diameter D: 250-850 mm (9.843-33.465 inch)
  • Overall Length L: 95-450 mm (3.740-17.717 inch)
  • Torque TKmax: 6,500-815,000 Nm (4,794.15-601,113.11 ft·lb)
  • Max. Radial Load Frad: 17,650-490,000 N (3,966.52-110,118.68 lb)

Product Characteristics

Your Advantages

The type RINGFEDER® TNK TKVO is a torsionally stiff barrel coupling with hub and housing made of high strength material. The inner ring integrated in the housing enables quick and easy assembly with an extremely compact coupling design. The type incorporates construction according to the operation sheet of the German Steel Iron Industry SEB 666212 for rope drum hinge joints.

Barrel couplings of the RINGFEDER® TNK TKVO type are particularly convincing due to the following features:

  • Torsionally rigid, compensate for angular and axial shaft misalignment
  • Torque transmission by steel rollers
  • With standardized connection to rope drums in crane lifting gear
  • Reduced assembly effort due to integrated inner ring as well as simplified insertion of the barrel coupling
  • With wear indicator for easier condition monitoring
  • Bore diameter d1 up to 440 mm (17.323 inch)
  • Outer diameter D up to 850 mm (33.465 inch)
  • Transmissible torque TKmax up to 815,000 Nm (601,113.11 ft·lb)
  • Maximum radial load Frad up to 490,000 N (110,118.68 lb)

 

Description & Characteristics

The barrel couplings consist of a housing made of high-strength material equipped with semi-circular internal toothing, and a hub made of high-strength material equipped with semi-circular external toothing of the same shape. Steel barrel rollers are inserted in the resulting circular receptacle to serve as power transmission elements. The inner cover integrated in the housing allows the hub diameter and thus also the bore diameter to be increased and also fixes the barrel roller axially to the drum. Outside the drum, axial fixation is provided by a retaining ring, which is also supported by an additional thrust ring. Lip seals prevent foreign bodies from ingressing or lubricant from leaking out.

The curved shape of the barrel rollers allows the hub to oscillate relative to the housing, thus compensating for angular misalignments. Depending on the coupling size, axial displacements of 3 to 8 mm (0.118 to 0.315 inch) can be accommodated during operation. The torque is transmitted by means of two carrier surfaces on the housing and their counter mating surfaces machined into the drum. The screws used as a connection to the drum facilitate the torque transmission. By using high-strength materials for both hub and housing, transmission capabilities could be increased significantly compared to earlier coupling types.

 

Application

Barrel couplings are used in material handling technology, especially in crane hoists, to connect the rope drum to the gearbox output shaft with minimum axial installation space. In this application, the barrel coupling transmits high torques and large radial forces, and acts as a joint. Thus, a rigid connection of the gear shaft to a hoist drum would result in a statically indeterminate case due to the three-point bearings (Figure No. 1). In that case, a high quality of alignment is required. However, unavoidable mounting inaccuracies, deflection of the steel structure under load, and rolling bearing wear occurring with use cause a positional misalignment, resulting enormous restoring forces that have to be absorbed by the gear shaft bearing. Alternating bending stresses can lead to fatigue failure as well as bearing and gear damage.

To avoid this risk, barrel couplings are interposed between the gear unit and the rope drum, which, due to their characteristics, compensate misalignments angularly. This additional joint turns a three-point bearing arrangement into a statically determined drive train, thus avoiding misalignment-related bending moments and constraining forces.

Figure No. 2 shows the assembly of a barrel coupling in a hoist. Considering that the coupling absorbs axial displacements and thus acts as a floating bearing, a spherical roller bearing must be provided as a locating bearing at the other end of the drum shaft.

 

Technical Information

Moreover, please observe the detailed selection and operating criteria in the documents Product Paper Barrel Couplings RINGFEDER® TNK and Tech Paper Barrel Couplings RINGFEDER® TNK TKVO.

 

Your Contact

You have specific questions, require technical support or you are interested in a customized solution? Our experts in Engineering and Sales are more than happy to assist you. Contact us quickly and easily via our request form, by e-mail or telephone.

Technical Data & CAD Models

You require CAD data for this product? Of course, we are more than happy to provide you with these. Contact us quickly and easily via our request form, by e-mail or using the "Need Help?" feature at the bottom right of this site.

CAD
Bezeichnung / Identifier
SEB 666212
Größe/Size
TKmax
Nm
Frad
N
d1kmin
mm
d1kmax
mm
D
mm
D2
mm
L
mm
Lmin
mm
D1
mm
H2
mm
FK
mm
C
mm
Gwsb
kg
WG3125 (*) 25 6500 17650 20 70 250 110 95 85 95 42 12 220 13
WG3128 (*) 50 8400 20000 20 80 280 127 100 85 110 42 12 250 17
WG3132 (*) 75 10500 21500 20 90 320 142 110 95 125 45 15 280 24
WG3134 (*) 100 16000 28000 20 100 340 155 125 95 140 45 15 300 32
WG3136 (*) 130 21500 37000 47 115 360 175 130 95 160 45 15 320 38
WG3138 (*) 160 27000 42500 47 130 380 194 145 95 180 45 15 340 48
WG3140 SG130 200 31500 48000 47 145 400 213 170 95 200 45 15 360 64
WG3142 (*) 300 39000 53000 47 160 420 234 175 95 220 45 15 380 79
WG3145 SG140 400 53500 75000 47 190 450 274 185 120 260 60 20 400 108
WG3151 (*) 500 91000 118000 77 215 510 314 220 125 295 60 20 460 163
WG3155 SG185 600 127000 132000 77 225 550 329 240 125 310 60 20 500 195
WG3158 SG200 1000 180000 145000 102 255 580 368 260 130 350 60 20 530 244
WG3165 SG240 1500 241000 184000 102 305 650 431 315 140 415 65 25 600 404
WG3166 (*) 2100 360000 283000 102 315 665 458 330 145 430 65 25 615 467
WG3168 SG270 2600 425000 330000 102 325 680 470 350 145 445 65 25 630 520
WG3171 SG315 3400 529000 366000 178 350 710 502 380 165 475 81 35 660 598
WG3178 SG355 4200 660000 420000 208 395 780 566 410 165 535 81 35 730 795
WG3185 SG400 6200 815000 490000 238 440 850 630 450 165 600 81 35 800 1049
CAD Bezeichnung / Identifier
SEB 666212
Größe/Size
TKmax
ft-lbs
Frad
lbs
d1kmin
inch
d1kmax
inch
D
inch
D2
inch
L
inch
Lmin
inch
D1
inch
H2
inch
FK
inch
C
inch
Gwsb
lbs
  WG3125 (*) 25 4794.205 3966.520 0.787 2.756 9.843 4.331 3.740 3.346 3.740 1.654 0.472 8.661 28.660
  WG3128 (*) 50 6195.588 4494.640 0.787 3.150 11.024 5.000 3.937 3.346 4.331 1.654 0.472 9.843 37.479
  WG3132 (*) 75 7744.485 4831.738 0.787 3.543 12.598 5.591 4.331 3.740 4.921 1.772 0.591 11.024 52.911
  WG3134 (*) 100 11801.120 6292.496 0.787 3.937 13.386 6.102 4.921 3.740 5.512 1.772 0.591 11.811 70.548
  WG3136 (*) 130 15857.755 8315.084 1.850 4.528 14.173 6.890 5.118 3.740 6.299 1.772 0.591 12.598 83.776
  WG3138 (*) 160 19914.390 9551.110 1.850 5.118 14.961 7.638 5.709 3.740 7.087 1.772 0.591 13.386 105.822
  WG3140 SG130 200 23233.455 10787.136 1.850 5.709 15.748 8.386 6.693 3.740 7.874 1.772 0.591 14.173 141.096
  WG3142 (*) 300 28765.230 11910.796 1.850 6.299 16.535 9.213 6.890 3.740 8.661 1.772 0.591 14.961 174.165
  WG3145 SG140 400 39459.995 16854.900 1.850 7.480 17.717 10.787 7.283 4.724 10.236 2.362 0.787 15.748 238.099
  WG3151 (*) 500 67118.870 26518.376 3.031 8.465 20.079 12.362 8.661 4.921 11.614 2.362 0.787 18.110 359.354
  WG3155 SG185 600 93671.390 29664.624 3.031 8.858 21.654 12.953 9.449 4.921 12.205 2.362 0.787 19.685 429.902
  WG3158 SG200 1000 132762.600 32586.140 4.016 10.039 22.835 14.488 10.236 5.118 13.780 2.362 0.787 20.866 537.928
  WG3165 SG240 1500 177754.370 41350.688 4.016 12.008 25.591 16.968 12.402 5.512 16.339 2.559 0.984 23.622 890.668
  WG3166 (*) 2100 265525.200 63599.156 4.016 12.402 26.181 18.031 12.992 5.709 16.929 2.559 0.984 24.213 1029.560
  WG3168 SG270 2600 313467.250 74161.560 4.016 12.795 26.772 18.504 13.780 5.709 17.520 2.559 0.984 24.803 1146.405
  WG3171 SG315 3400 390174.530 82251.912 7.008 13.780 27.953 19.764 14.961 6.496 18.701 3.189 1.378 25.984 1318.365
  WG3178 SG355 4200 486796.200 94387.440 8.189 15.551 30.709 22.283 16.142 6.496 21.063 3.189 1.378 28.740 1752.676
  WG3185 SG400 6200 601119.550 110118.680 9.370 17.323 33.465 24.803 17.717 6.496 23.622 3.189 1.378 31.496 2312.651

Downloads

Product Paper Barrel Couplings RINGFEDER® TNK

Product Paper Barrel Couplings RINGFEDER® TNK

Tech Paper Barrel Couplings RINGFEDER® TNK TKVO

Tech Paper Barrel Couplings RINGFEDER® TNK TKVO

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Downloads