Steel Disc Couplings TND OCO | RINGFEDER®

Standard Hubs with Open Flange, Double-Jointed, with Compact-Spacer, Shaft-Hub Connection by Keyway according to DIN 6885-1

  • 4 Sizes
  • Max. Bore Diameter d: 32-65 mm (1.259-2.559 inch)
  • Max. Outer Diameter D1: 70.5-140.5 mm (2.756-5.531 inch)
  • Hub Distance E: 31.2-55 mm (1.228-2.165 inch)
  • Overall Length L: 110-175 mm (4.331-6.889 inch)
  • Rot. Speed nmax: 4,600-8,400 1/min
  • Torque TKN: 170-1,750 Nm (125.36-1,290.73 ft·lb)

Product Characteristics

Your Benefits

The type RINGFEDER® TND OCO is a torsionally stiff, backlash-free steel disc coupling consisting of two standard hubs with open flange O and a compact-spacer C that can be installed and removed radially. 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 angular, axial and radial shaft misalignments with minimum axial space requirement.

 

Steel disc couplings of the RINGFEDER® TND OCO 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
  • Minimum shaft distance for standard hubs
  • Radially install- and removeable compact-spacer
  • Bore diameter d1/2 up to 65 mm (2.559 inch)
  • Transmissible torque TKN up to 1,750 Nm (1,290.73 ft·lb) / Tkmax up to 3,000 Nm (2,212.69 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

 

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; 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.
  • Screwing of disc packs via hexagon socket screws (coupling size 47-98).

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 OCO.

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
E
mm
H3
mm

D1


mm
D2
mm
L2
mm
L
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 32 32 39,5 39,5 31,2 7,5 70,5 47 5 110 24 6 1,6 0,71 0,084 0,089 0,9 0,5 2 1,4 0,3 0,2
63 320 420 6800 14 42 42 45 45 38 9 88 62,5 8 128 32 6 3,1 2,2 0,136 0,151 0,8 0,7 2 1,4 0,4 0,3
82 750 1050 5400 15 55 55 55 55 46,5 10,5 116 82 10 156,5 40 6 6,7 8 0,309 0,360 1,4 0,6 2 1,4 0,5 0,4
98 1350 1750 4600 19 65 65 60 60 55 12 140,5 98 11 175 47 6 10,3 18 0,569 0,607 2 1 2 1,4 0,7 0,5
CAD Größe/Size
TKN HD
ft-lbs
TKN HT
ft-lbs
nmax
rpm
dpre
inch
d1kmax
inch
d2kmax
inch
C1
inch
C2
inch
E
inch
H3
inch

D1


inch
D2
inch
L2
inch
L
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 8400 0.394 1.260 1.260 1.555 1.555 1.228 0.295 2.776 1.850 0.197 4.331 0.945 6 3.527 2.426 0.062 0.066 0.035 0.020 0.079 0.055 0.012 0.008
  63 236.022 309.779 6800 0.551 1.654 1.654 1.772 1.772 1.496 0.354 3.465 2.461 0.315 5.039 1.260 6 6.834 7.517 0.100 0.111 0.031 0.028 0.079 0.055 0.016 0.012
  82 553.178 774.449 5400 0.591 2.165 2.165 2.165 2.165 1.831 0.413 4.567 3.228 0.394 6.161 1.575 6 14.771 27.336 0.228 0.265 0.055 0.024 0.079 0.055 0.020 0.016
  98 995.720 1290.748 4600 0.748 2.559 2.559 2.362 2.362 2.165 0.472 5.531 3.858 0.433 6.890 1.850 6 22.708 61.506 0.420 0.447 0.079 0.039 0.079 0.055 0.028 0.020
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

Tech Paper Steel Disc Couplings RINGFEDER® TND OCO

Tech Paper Steel Disc Couplings RINGFEDER® TND OCO

RINGFEDER® Product Guide

RINGFEDER® Product Guide

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

Downloads

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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®