Steel Disc Couplings TND QCQ
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
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
- 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.
- Screwing of disc packs via hexagon socket screws (coupling size 82-98).
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 QCQ.
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 TND type? 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 |
| CAD |
Größe/Size |
TKN HD ft-lbs |
TKN HT ft-lbs |
nmax rpm |
d1min inch |
d2min inch |
d1max inch |
d2max inch |
C1 inch |
C2 inch |
E inch |
H3 inch |
D1 inch |
L2 inch |
L inch |
nSc pcs. |
L8 inch |
GWsp lbs |
CTdynHD 106ft-lbs/rad |
CTdynHT 106ft-lbs/rad |
ΔKaHD inch |
ΔKaHT inch |
ΔKwHD ° |
ΔKwHT ° |
ΔKrHD inch |
ΔKrHT inch |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 82 | 553.178 | 774.449 | 3600 | 1.496 | 1.496 | 2.559 | 2.559 | 2.165 | 2.165 | 1.831 | 0.413 | 4.567 | 0.394 | 6.161 | 6 | 0.209 | 3.968 | 0.228 | 0.266 | 0.055 | 0.024 | 2.000 | 1.400 | 0.020 | 0.016 | |
| 98 | 995.720 | 1290.748 | 3600 | 1.969 | 1.969 | 2.756 | 2.756 | 2.362 | 2.362 | 2.165 | 0.472 | 5.531 | 0.433 | 6.890 | 6 | 0.209 | 6.393 | 0.420 | 0.448 | 0.079 | 0.039 | 2.000 | 1.400 | 0.028 | 0.020 |
Images & Drawings
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.
Your Contact to Us
You like to 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. We look forward to your inquiry! Because excellent solutions always start with excellent guidance.
Contact us quickly and easily via our request form, by e-mail or telephone, or also using the "Need Help?" feature at the bottom right of this site.
