Steel Disc Couplings TND QCQ | RINGFEDER®

Hubs with Open Flange and RINGFEDER® Shrink Discs, Double-Jointed, with Compact-Spacer, Shaft-Hub Connection by Shrink Disc

  • 2 Sizes
  • Bore Diameter d: 38-70 mm (1.496-2.756 inch)
  • Max. Outer Diameter D1: 116-145 mm (4.567-5.709 inch)
  • Hub Distance E: 46.5-55 mm (1.831-2.165 inch)
  • Overall Length L: 156.5-175 mm (6.161-6.889 inch)
  • Rot. Speed nmax: 3,600 1/min
  • Torque TKN: 750-1,750 Nm (553.17-1,290.73 ft·lb)

Product Characteristics

Your Benefits

The type RINGFEDER® TND QCQ is a torsionally stiff, backlash-free steel disc coupling consisting of two hubs with open flange Q prepared to be equipped with shrink discs of the series RINGFEDER® RfN 4061 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. A permanently backlash-free fixation of the coupling hubs on the shafts to be connected is realized by means of high-quality RINGFEDER® Shrink Discs.

 

Steel disc couplings of the RINGFEDER® TND QCQ 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
  • Simplified shrink disc selection thanks to RINGFEDER® Shrink Discs specifically assigned per coupling size
  • Bore diameter d1/2 up to 70 mm (2.756 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 3,600 1/min
  • Efficient realization of customer-specific solutions at short delivery times thanks to modular design

 

Technical Information

  • The specified values for transmissible torques are valid as follows: Shaft tolerance h6 for shaft diameters up to 50 mm; Shaft tolerance g6 for shaft diameters from 50 mm; Surface quality Ra ≤ 3.2 μm.
  • 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 and the spacer are balanced 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 QCQ.

 

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

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
Größe/Size
TKN HD
Nm
TKN HT
Nm
nmax
1/min
d1min
mm
d2min
mm
d1max
mm
d2max
mm
C1
mm
C2
mm
E
mm
H3
mm

D1


mm
L2
mm
L
mm
nSc
Stück
L8
mm
GWsp
kg
CTdynHD
106Nm/rad
CTdynHT
106Nm/rad
ΔKaHD
mm
ΔKaHT 
mm
ΔKwHD
°
ΔKwHT
°
ΔKrHD
mm
ΔKrHT
mm
82 750 1050 3600 38 38 65 65 55 55 46,5 10,5 116 10 156,5 6 5,3 1,8 0,309 0,360 1,4 0,6 2,0 1,4 0,5 0,4
98 1350 1750 3600 50 50 70 70 60 60 55 12 140,5 11 175 6 5,3 2,9 0,569 0,607 2,0 1,0 2,0 1,4 0,7 0,5
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 QCQ

Tech Paper Steel Disc Couplings RINGFEDER® TND QCQ

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

Downloads