Product Paper Gear Couplings RINGFEDER® TNZ
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Gear Couplings Product Paper & Tech Paper

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Your system supplier for every aspect of power transmission We say what we mean and mean what we say. We see things from our customers‘ perspective. We are considerate of our employees and their families as well as of our environment and society. RINGFEDER POWER TRANSMISSION is the global market leader in the niche markets of drive technology and is well regarded for its customer-specific, application-oriented solutions that ensure excellent and failure-free operation for its clients. We offer locking devices, damping technology and couplings for OEMs but also for the final customer under...

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Your projects are our drive Know-how: Over 90 years of expertise. Rely on decades of engineering expertise from the inventor of the friction spring. As an expert in drive and damping technology, we are your reliable partner wherever forces are at work. Be it the permanent transfer of very high torques due to non-positive or positive connections or the absorption and trapping of extreme energies to protect expensive constructions. Your expert partner: From development to the finished product. We accompany you through to the successful completion of your project. Beginning with the...

RINGFEDER® Gear Couplings Introduction The RINGFEDER® TNZ torsionally rigid gear couplings are designed to connect machine shafts required to transmit high torques. These couplings have a very compact design which results in a high power density. The coupling housings have a straight internal toothing whilst the hubs have an external toothing with a chased variable radius. As a result, the hubs can move spatially within the housing and thus compensate angular, radial and axial shaft misalignment of the adjoined shaft ends within specified tolerances. Standard gearing allows angular...

Customisation The modular design of the RINGFEDER® TNZ Gear Coupling offers highly flexible options for the assembly of many coupling designs. Suitable components such as brake discs and drums, torsion shafts or constructions for vertical operation of a coupling can be adapted to suit requirements. Nut Screw plug Toothed sleeve O-ring Toothed sleeve O-ring Materials Standard toothed hubs and sleeves are manufactured using high quality heat treated steel with yield strengths of at least 335 N/mm². RINGFEDER® can offer special solutions using increased strength materials for instances with...

Coupling selection The dimensioning of torsionally rigid RINGFEDER® Gear Couplings will be based on the nominal and maximum torques TN and Tmax of the machines. The maximum coupling torque TKmax must not be exceeded under any operational condition (start-up, electrical short, blocking, etc.). = Nominal torque of machine Torque characteristics at operating point on outputside Constant, uniform, without torque variation Load for working machine Torque characteristics Minimum load factor SL Uniform load (SL >1) Generator (except welding generator) Belt conveyor (unevenly loaded) Printing...

The alignment factor SA is a function of the ratio between nominal speed nnom and reference speed nmax and the angular displacement. It may be determined by means of the diagram. Checking the selected size Determining the alignment factor SA as a function of angular displacement Consider the permissible rpm of the coupling. Check whether the coupling should be dynamically balanced. Check the torque transmitted through the shaft-hub connection. Please select an extended hub if the standard hub is too short. Check whether shaft diameter does not exceed max. bore diameter. The shock torque...

Gear Couplings RINGFEDER® TNZ ZCA / TNZ ZCB Further information on RINGFEDER® TNZ ZCA / TNZ ZCB on www.ringfeder.com ZCA: with integrated O-ring ZCB: with separate O-ring cover Standard hubs The RINGFEDER® TNZ ZCA coupling is a torsionally stiff gear coupling designed to have some backlash and consists of two coupling halves that are connected by fitted bolts. Unlike the TNZ ZCA coupling, the RINGFEDER® TNZ ZCB comes with a bolt-on O-ring carrier which facilitates installation by changing the mounting sequence. For mounting the coupling, unscrew the cover and place it on the shaft. Mount...

Gear Couplings RINGFEDER® TNZ ZCAU / TNZ ZCBU Further information on RINGFEDER® TNZ ZCAU / TNZ ZCBU on www.ringfeder.com ZCA: with integrated O-ring ZCB: with separate O-ring cover Standard hub and extended universal hub Compared to the model TNZ ZCAU, the RINGFEDER® TNZ ZCBU coupling is equipped with an O-ring carrier which facilitates installation by changing the mounting sequence. For mounting the coupling, unscrew the cover and place it on the shaft. Mount the hub onto the shaft, slide the sleeve onto the hub and fasten the O-ring carrier to the sleeve. This way of mounting is...

Further information on RINGFEDER® TNZ ZCAUU / TNZ ZCBUU on www.ringfeder.com 3 D ZCA: with integrated O-ring ZCB: with separate O-ring cover Extended universal hubs Gear Couplings RINGFEDER® TNZ ZCAUU / TNZ ZCBUU Compared to the TNZ ZCAUU, the coupling model RINGFEDER® TNZ ZCBUU is equipped with an O-ring carrier which facilitates installation by changing the mounting sequence. For mounting the coupling, unscrew the cover and place it on the shaft. Mount the hub onto the shaft, slide the sleeve onto the hub and fasten the O-ring carrier to the sleeve. This way of mounting is advantageous...

Further information on RINGFEDER® TNZ ZCAF / TNZ ZCBF on www.ringfeder.com ZCA: with integrated O-ring ZCB: with separate O-ring cover Intermediate shaft and rigid counter-flanges C3 Gear Couplings RINGFEDER® TNZ ZCAF / TNZ ZCBF L The model RINGFEDER® TNZ ZCBF is composed from the coupling halves of the coupling TNZ ZCB and is complemented by an intermediate shaft and two rigid counter-flanges. If required, the torsional stiffness of the shaft can be tuned to the dynamic behavior of the drive line. In addition, the intermediate shaft, which serves to halves of the coupling TNZ ZCA and is...