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: 2,100-8,400 1/min
  • Torque TKN: 170-44,000 Nm (125.36-32,452.73 ft·lb)

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 8,400 1/min
  • Efficient realization of customer-specific solutions at short delivery times thanks to modular design

 

Technical Information

  • Without further specifications, we deliver as standard: Bore tolerance H7; Keyway acc. to DIN 6885-1; Keyway width tolerance P9; Set screw per hub.
  • 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.

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.

 

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.

 

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.

High-Quality Steel 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 8400 10 25 25 33 33 4 60 7,5 70,5 37 5 70 11 24 6 1,2 0,6 0,071 0,075 1 0,6 2 1,4 0,8 0,6
47 170 230 8400 10 25 25 39,5 39,5 31 100 7,5 70,5 37 5 110 11 24 6 1,4 0,66 0,059 0,062 1 0,6 2 1,4 1,5 1,1
63 320 420 6800 14 32 32 41 41 4 70 9 88 48 8 86 14 32 6 2,4 2,04 0,126 0,139 1 0,8 2 1,4 1 0,7
63 320 420 6800 14 32 32 45 45 6 80 9 88 48 8 96 14 32 6 2,5 2,08 0,126 0,139 1 0,8 2 1,4 1,1 0,8
82 750 1050 5400 15 44 44 55 55 10 100 10,5 116 64 10 120 16 40 6 5,7 7,90 0,271 0,308 1,4 0,8 2 1,4 1,4 1,1
82 750 1050 5400 15 44 44 55 55 50 140 10,5 116 64 10 160 16 40 6 6 8,32 0,246 0,277 1,4 0,8 2 1,4 2,1 1,5
98 1350 1750 4600 19 50 50 59 59 4 100 12 140,5 77 11 122 19 47 6 8,8 18,36 0,513 0,543 2 1,2 2 1,4 1,5 1
98 1350 1750 4600 19 50 50 60 60 42 140 12 140,5 77 11 162 19 47 6 9,2 19,22 0,469 0,494 2 1,2 2 1,4 2,1 1,5
118 2400 3000 3800 25 60 60 60 60 4 100 13 166,5 90,5 12 124 21 55 6 13,1 39,38 0,914 0,948 2,4 1,6 2 1,4 1,4 1
118 2400 3000 3800 25 60 60 75 75 14 140 13 166,5 90,5 12 164 21 55 6 13,8 41,44 0,855 0,884 2,4 1,6 2 1,4 2,1 1,5
141 4000 5200 3400 30 75 75 81 81 6 140 15 198,5 114 14 168 23 64 6 22,6 100,41 1,306 1,362 2,8 1,6 2 1,4 2 1,5
141 4000 5200 3400 30 75 75 90 90 28 180 15 198,5 114 14 208 23 64 6 24,7 105,33 1,229 1,279 2,8 1,6 2 1,4 2,7 2
169 6500 8500 3000 39 90 90 103 103 6 180 21 238 135 16 212 29 81 6 43,5 256,20 2,375 2,898 3 2,4 2 1,4 2,6 1,9
169 6500 8500 3000 39 90 90 125 125 32 250 21 238 135 16 282 29 81 6 46,2 273,61 2,231 2,686 3 2,4 2 1,4 3,8 2,7
205 21000 26000 2500 59 115 115 142 142 10 250 28 295 170 22 294 32 112 8 93,4 862,77 8,265 8,389 2,2 1,2 1 0,8 1,8 1,5
254 36000 44000 2100 79 120 120 146 146 10 250 32,5 345 180 26 302 40 133 8 132,8 1734,93 14,302 14,497 2,2 1,6 1 0,8 1,8 1,5
254 36000 44000 2100 79 120 120 171 171 10 300 32,5 345 180 26 352 40 133 8 136,6 1774,98 13,163 13,328 2,2 1,6 1 0,8 2,2 1,8
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

Tech Paper Steel Disc Couplings RINGFEDER® TND VDV

Tech Paper Steel Disc Couplings RINGFEDER® TND VDV

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