Steel Disc Couplings TND VDV | RINGFEDER®

Inverted Hubs, Double-Jointed, with Spacer, Shaft-Hub Connection by Keyway according to DIN 6885-1

  • 9 Sizes
  • Max. Bore Diameter d: 25-120 mm (0.984-4.724 inch)
  • Max. Outer Diameter D1: 70.5-345 mm (2.776-13.583 inch)
  • Hub Distance E: 60-300 mm (2.362-11.811 inch)
  • Overall Length L: 70-352 mm (2.756-13.858 inch)
  • Rot. Speed nmax: 2,500-12,200 1/min
  • Torque TKN: 170-44,000 Nm (125.36-32,452.73 ft·lb)

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Product Characteristics

Your Benefits

The type RINGFEDER® TND VDV is a torsionally stiff, backlash-free steel disc coupling consisting of two inverted hubs V, connected by a spacer D in standardized length. Using high-strength screws, one disc pack each is connected to the spacer and one hub, thus achieving the function of a double-cardanic system.

Depending on the coupling size, two different disc packs are available:

  • Type HD (= High Deflection) for increased compensation capability at occurring shaft misalignments.
  • Type HT (= High Torque) with larger power density for higher requirements on transmissible torque.

The double-jointed design with two disc packs compensates for radial (adjustable via the spacer length), angular and axial shaft misalignments. By utilizing the standard spacers, the largest possible disc pack distance and thus the largest possible radial misalignment is realized at minimum distance of the shafts to be connected.

 

Steel disc couplings of the RINGFEDER® TND VDV type are particularly convincing due to the following features:

  • Completely backlash- and maintenance-free
  • Highly effective compensation of angular, axial and radial shaft misalignment
  • Torsionally rigid with high torsional stiffness
  • Low restoring forces in case of shaft misalignment due to optimum disc pack design
  • Bridging of large shaft distances by means of spacers in various standard lengths
  • Maximum radial misalignment at minimum shaft distance
  • Bore diameter d1/2 up to 120 mm (4.724 inch)
  • Transmissible torque TKN up to 44,000 Nm (32,452.73 ft·lb) / Tkmax up to 77,000 Nm (56,792.29 ft·lb)
  • Rotational speeds depending on spacer length nmax up to 12,200 1/min
  • Efficient realization of customer-specific solutions at short delivery times thanks to modular design

 

ATEX Compliance

For maximum safety in explosion-endangered areas, RINGFEDER® Steel Disc Couplings can of course be supplied in compliance with ATEX according to Product Directive 2014/34/EU and DIN EN ISO 80079-36:2016 if required.

 

Main Areas of Use

  • Pumps
  • Fans
  • Compressors
  • Generator and Turbine Drives
  • Axial and Radial Blowers
  • Paper and Printing Machines
  • Mixers and Stirrers
  • Extruders
  • Lifting and Traversing Gears
  • Marine Drives
  • Water Screw Drives

 

Technical Information

  • Without further specifications, we deliver as standard: Bore tolerance H7; Keyway acc. to DIN 6885-1; Keyway width tolerance P9.
  • From a peripheral speed of 30 m/s, separate balancing of the individual coupling parts is recommended.
  • Without further instructions on balancing, the coupling parts are balanced individually according to DIN 21940-11 in quality G 6,3 at 1,500 1/min. The hubs are balanced half key (before grooving), the spacer without screwed-on disc packs.
  • Screwing of disc packs via hexagon socket screws (coupling size 47-141) or hexagon head screws (coupling size 169-254).

Moreover, please observe the detailed selection and operating criteria in the documents Product Paper Steel Disc Couplings RINGFEDER® TND and Tech Paper Steel Disc Couplings RINGFEDER® TND VDV.

Steel Disc Couplings TND: High-Quality Disc Packs | RINGFEDER®

High-Quality Disc Packs

The characteristic and functional key element of the powerful steel disc couplings of the RINGFEDER® TND series are disc packs developed on the basis of in-depth FEM analysis. They consist of multiple circular, torsionally flexible single discs made of stainless spring steel which are connected by means of high-precision sleeves to form a compact unit. High-strength screws alternately connect the disc packs, if necessary via mounted spacers, to the coupling hubs, so that the required torque is transmitted reliably, precisely and safely by the steel discs which are loaded by tension and compression. At the same time, this ensures the desired compensation capability for angular, axial and, depending on the coupling type, also radial shaft misalignments at minimum restoring forces.

Technical Data & CAD Models

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CAD
Größe/Size
TKN HD
Nm
TKN HT
Nm
nmax
1/min
dpre
mm
d1kmax
mm
d2kmax
mm
C1
mm
C2
mm
EI1
mm
E
mm
H3
mm

D1


mm
D4
mm
L2
mm
L
mm
SB
mm
SD
mm
nSc
Stück
Gwsb
kg
Jsb
10-3kgm2
CTdynHD
106Nm/rad
CTdynHT
106Nm/rad
ΔKaHD
mm
ΔKaHT 
mm
ΔKwHD
°
ΔKwHT
°
ΔKrHD
mm
ΔKrHT
mm
47 170 230 12200 10 25 25 33 33 4 60 7,5 70,5 37 5 70 7 24 6 1,2 0,6 0,071 0,075 1 0,6 2 1,4 0,8 0,6
47 170 230 12200 10 25 25 39,5 39,5 31 100 7,5 70,5 37 5 110 7 24 6 1,4 0,66 0,059 0,062 1 0,6 2 1,4 1,5 1,1
63 320 420 9900 14 32 32 41 41 4 70 9 88 48 8 86 9 32 6 2,4 2,04 0,126 0,139 1 0,8 2 1,4 1 0,7
63 320 420 9900 14 32 32 45 45 6 80 9 88 48 8 96 9 32 6 2,5 2,08 0,126 0,139 1 0,8 2 1,4 1,1 0,8
82 750 1050 7500 15 44 44 55 55 10 100 10,5 116 64 10 120 11 40 6 5,7 7,90 0,271 0,308 1,4 0,8 2 1,4 1,4 1,1
82 750 1050 7500 15 44 44 55 55 50 140 10,5 116 64 10 160 11 40 6 6 8,32 0,246 0,277 1,4 0,8 2 1,4 2,1 1,5
98 1350 1750 6200 19 50 50 59 59 4 100 12 140,5 77 11 122 15 47 6 8,8 18,36 0,513 0,543 2 1,2 2 1,4 1,5 1
98 1350 1750 6200 19 50 50 60 60 42 140 12 140,5 77 11 162 15 47 6 9,2 19,22 0,469 0,494 2 1,2 2 1,4 2,1 1,5
118 2400 3000 5250 25 60 60 60 60 4 100 13 166,5 90,5 12 124 17 55 6 13,1 39,38 0,914 0,948 2,4 1,6 2 1,4 1,4 1
118 2400 3000 5250 25 60 60 75 75 14 140 13 166,5 90,5 12 164 17 55 6 13,8 41,44 0,855 0,884 2,4 1,6 2 1,4 2,1 1,5
141 4000 5200 4400 30 75 75 81 81 6 140 15 198,5 114 14 168 18 64 6 22,6 100,41 1,306 1,362 2,8 1,6 2 1,4 2 1,5
141 4000 5200 4400 30 75 75 90 90 28 180 15 198,5 114 14 208 18 64 6 24,7 105,33 1,229 1,279 2,8 1,6 2 1,4 2,7 2
169 6500 8500 3650 39 90 90 103 103 6 180 21 238 135 16 212 24 81 6 43,5 256,20 2,375 2,898 3 2,4 2 1,4 2,6 1,9
169 6500 8500 3650 39 90 90 125 125 32 250 21 238 135 16 282 24 81 6 46,2 273,61 2,231 2,686 3 2,4 2 1,4 3,8 2,7
205 21000 26000 2950 59 115 115 142 142 10 250 28 295 170 22 294 27 112 8 93,4 862,77 8,265 8,389 2,2 1,2 1 0,8 1,8 1,5
254 36000 44000 2500 79 120 120 146 146 10 250 32,5 345 180 26 302 29 133 8 132,8 1734,93 14,302 14,497 2,2 1,6 1 0,8 1,8 1,5
254 36000 44000 2500 79 120 120 171 171 10 300 32,5 345 180 26 352 29 133 8 136,6 1774,98 13,163 13,328 2,2 1,6 1 0,8 2,2 1,8
CAD Größe/Size
 		TKN HD
ft-lbs 		TKN HT
ft-lbs 		nmax
rpm 		dpre
inch 		d1kmax
inch 		d2kmax
inch 		C1
inch 		C2
inch 		EI1
inch 		E
inch 		H3
inch

D1


inch 		D4
inch 		L2
inch 		L
inch 		SB
inch 		SD
inch 		nSc
pcs. 		Gwsb
lbs 		Jsb
lbs-in2 		CTdynHD
106ft-lbs/rad 		CTdynHT
106ft-lbs/rad 		ΔKaHD
inch 		ΔKaHT 
inch 		ΔKwHD
° 		ΔKwHT
° 		ΔKrHD
inch 		ΔKrHT
inch
  47 125.387 169.641 12200 0.394 0.984 0.984 1.299 1.299 0.157 2.362 0.295 2.776 1.457 0.197 2.756 0.276 0.945 6 2.646 2.050 0.052 0.055 0.039 0.024 0.079 0.055 0.031 0.024
  47 125.387 169.641 12200 0.394 0.984 0.984 1.555 1.555 1.220 3.937 0.295 2.776 1.457 0.197 4.331 0.276 0.945 6 3.086 2.255 0.044 0.046 0.039 0.024 0.079 0.055 0.059 0.043
  63 236.022 309.779 9900 0.551 1.260 1.260 1.614 1.614 0.157 2.756 0.354 3.465 1.890 0.315 3.386 0.354 1.260 6 5.291 6.971 0.052 0.055 0.039 0.031 0.079 0.055 0.039 0.028
  63 236.022 309.779 9900 0.551 1.260 1.260 1.772 1.772 0.236 3.150 0.354 3.465 1.890 0.315 3.780 0.354 1.260 6 5.512 7.107 0.093 0.103 0.039 0.031 0.079 0.055 0.043 0.031
  82 553.178 774.449 7500 0.591 1.732 1.732 2.165 2.165 0.394 3.937 0.413 4.567 2.520 0.394 4.724 0.433 1.575 6 12.566 26.994 0.200 0.227 0.055 0.031 0.079 0.055 0.055 0.043
  82 553.178 774.449 7500 0.591 1.732 1.732 2.165 2.165 1.969 5.512 0.413 4.567 2.520 0.394 6.299 0.433 1.575 6 13.228 28.429 0.181 0.204 0.055 0.031 0.079 0.055 0.083 0.059
  98 995.720 1290.748 6200 0.748 1.969 1.969 2.323 2.323 0.157 3.937 0.472 5.531 3.031 0.433 4.803 0.591 1.850 6 19.401 62.736 0.378 0.401 0.079 0.047 0.079 0.055 0.059 0.039
  98 995.720 1290.748 6200 0.748 1.969 1.969 2.362 2.362 1.654 5.512 0.472 5.531 3.031 0.433 6.378 0.591 1.850 6 20.283 65.675 0.346 0.364 0.079 0.047 0.079 0.055 0.083 0.059
  118 1770.168 2212.710 5250 0.984 2.362 2.362 2.362 2.362 0.157 3.937 0.512 6.555 3.563 0.472 4.882 0.669 2.165 6 28.881 134.561 0.674 0.699 0.094 0.063 0.079 0.055 0.055 0.039
  118 1770.168 2212.710 5250 0.984 2.362 2.362 2.953 2.953 0.551 5.512 0.512 6.555 3.563 0.472 6.457 0.669 2.165 6 30.424 141.600 0.631 0.652 0.094 0.063 0.079 0.055 0.083 0.059
  141 2950.280 3835.364 4400 1.181 2.953 2.953 3.189 3.189 0.236 5.512 0.591 7.815 4.488 0.551 6.614 0.709 2.520 6 49.825 343.101 0.963 1.005 0.110 0.063 0.079 0.055 0.079 0.059
  141 2950.280 3835.364 4400 1.181 2.953 2.953 3.543 3.543 1.102 7.087 0.591 7.815 4.488 0.551 8.189 0.709 2.520 6 54.454 359.913 0.907 0.943 0.110 0.063 0.079 0.055 0.106 0.079
  169 4794.205 6269.345 3650 1.535 3.543 3.543 4.055 4.055 0.236 7.087 0.827 9.370 5.315 0.630 8.346 0.945 3.189 6 95.901 875.435 1.752 2.138 0.118 0.094 0.079 0.055 0.102 0.075
  169 4794.205 6269.345 3650 1.535 3.543 3.543 4.921 4.921 1.260 9.843 0.827 9.370 5.315 0.630 11.102 0.945 3.189 6 101.854 934.925 1.646 1.981 0.118 0.094 0.079 0.055 0.150 0.106
  205 15488.970 19176.820 2950 2.323 4.528 4.528 5.591 5.591 0.394 9.843 1.102 11.614 6.693 0.866 11.575 1.063 4.409 8 205.912 2948.085 6.097 6.188 0.087 0.047 0.039 0.031 0.071 0.059
  254 26552.520 32453.080 2500 3.110 4.724 4.724 5.748 5.748 0.394 9.843 1.280 13.583 7.087 1.024 11.890 1.142 5.236 8 292.774 5928.256 10.550 10.693 0.087 0.063 0.039 0.031 0.071 0.059
  254 26552.520 32453.080 2500 3.110 4.724 4.724 6.732 6.732 0.394 11.811 1.280 13.583 7.087 1.024 13.858 1.142 5.236 8 301.152 6065.107 9.709 9.831 0.087 0.063 0.039 0.031 0.087 0.071

Images & Drawings

Dimensions Dimensions
V-Hub Front View V-Hub Front View
V-Hub Back View V-Hub Back View
Spacer D Spacer D
Steel Disc Couplings TND: Smart Modular System for Maximum Flexibility | RINGFEDER®

Smart Modular System

Thanks to the unitized design of the RINGFEDER® TND series and the accompanying highly flexible modular system, consisting of several disc pack and hub types, mounting options as well as spacer variants and lengths, there is always one coupling version available that is optimally suited for your individual application. Furthermore, customized special solutions can also be realized at short delivery times in specific case of need. For example, in addition to other hub combinations and the replacement of hubs by connecting flanges, functional supplements like brake disks or drums as well as anti-flail devices are also possible.

Downloads
Product Paper Steel Disc Couplings RINGFEDER® TND

Product Paper Steel Disc Couplings RINGFEDER® TND

EN English DE German
Tech Paper Steel Disc Couplings RINGFEDER® TND VDV

Tech Paper Steel Disc Couplings RINGFEDER® TND VDV

EN English DE German
RINGFEDER® Product Guide

RINGFEDER® Product Guide

DE German, EN English

Further downloads including certificates, instruction manuals and product images are available to you in our Download Center:

Downloads

Suitable Industry Solutions

Special Machines
Chemical
Pulp & Paper
Refining
Gearboxes
Pumps
Compressors
Thermal Power Stations
Hydro Power Stations
Oil & Gas

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Steel Disc Couplings TND: Ideal for test benches, compressors and pumps, printing and packaging machines ventilation and fan systems or other industrial application areas | RINGFEDER®
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