Ringfeder TNZ ZCAK and  ZCBK series of gear couplings are equipped with a limitation of the end float. The end float limitation serves to axially locate a shaft that is mounted on sleeve bearings. The rotor of an electric motor with sleeve bearings can be aligned with a desired tolerance range with the help of the coupling to the bearing of the driven machine. In this case the rotor remains at its magnetic centre during the driving machine acceleration process.The limitation of the end float has an opportunity to compensate for radial and angular shaft misalignments. In contrast to the TNZ ZCAK with integrated O-ring, the TNZ ZCBK has screwed-on, separate O-ring supports.

General Features

• Torsionally rigid gear coupling made of high-quality steel

• Very compact design results in a high-power density
• The elastic O-Ring can be replaced without having to move the coupled machines
• Compensates for angular, radial and axial shaft misalignments
• Suitable for use in temperatures up to +120 °C if special seals are used
• Available with split sleeve (ZCA / ZCB - ZCA model range also available in ZCB design) and single-piece sleeve (ZCH)
• Torques up to TKn = 195,000 Nm / TKmax = 390,000 Nm
• Speeds up to nmax = 6,000 rpm
• Bores up to 270 mm

Toothing

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 providing an angular, radial and axial shaft misalignment of the adjoined shaft ends within specified tolerances. Depending on coupling type and size, the standard toothing allows an angular misalignment of up to 0.5 degrees per toothing-plane and also an axial movement of several millimetres. he max. possible radial shaft displacement is dependent on the distance between the two toothing planes.

Materials

There are used high-quality greases to provide the proper productivity and long lifespan of the gear couplings. Special materials can be utilized for further specific applications. Sealing is carried out using O-Rings of synthetic rubber. The housings are centred and held together by fit-bolts and self-locking nuts. 

The material used is forged steel with an apparent yielding point of at least 335 N/mm2.

Special Applications

There should be implemented an examination if greater misalignments are expected at higher torques and speeds, performed with the assistance of a special computing programme. The process depends on the determined size. The value TKmax may not be exceeded in any state of operation (start-up, electrical short circuit, blocking, etc.).

Tolerances and Standards

The bore tolerance is ISO H7, if not ordered differently. The bore diameters listed refer to keyways to DIN 6885-1 with wide toleranz ISO P9.

Temperature

The use of special seals permits the temperature limit to be raised to 120 °C.

Balance

At peripheral speeds upwards of 30 m/s it is advisable to dynamically balance the coupling.

Ringfeder-Product-Paper-Gear-Couplings.pdf

Ringfeder-Instruction-Manual-Gear-Couplings.pdf

Feel free to Contact Us if you have any questions, need more information or if you are interested in purchasing TNZ ZCAK / ZCBK series of gear couplings.

HVH Industrial Solutions is a distributor of Ringfeder.

We work closely with the Ringfeder engineering team to provide superior customer service and engineering support.