The Ringfeder TNZ ZCA is a torsionally rigid gear coupling with controlled backlash, consisting of two coupling halves connected by fitted bolts.

The Ringfeder TNZ ZCB shares the same operating principle but features a bolt-on O-ring carrier that simplifies the installation process by altering the mounting sequence. During installation, the cover is first removed and positioned on the shaft, followed by mounting the hub onto the shaft. The sleeve is then slid onto the hub before the O-ring carrier is fastened to the sleeve. This installation method is particularly beneficial for larger coupling sizes.

The coupling features straight internal teeth and hubs with crowned external teeth, allowing compensation for angular, radial and axial shaft misalignment. Standard tooth geometry accommodates angular misalignment of up to 0.5° per toothing plane, with axial movement of several millimetres, while radial displacement depends on the distance between the toothing planes. Manufactured from forged steel with a minimum apparent yield strength of 335 N/mm², the coupling incorporates high-quality tooth profiles and ultra-high-pressure grease to minimise restoring forces and support a long service life. Synthetic rubber O-rings provide sealing, with the coupling sleeves secured by fitted bolts and self-locking nuts. Alternative tooth geometries and materials are available for specialised applications, and with special seals, operating temperatures of up to +120°C can be achieved.

Features

• Torsionally rigid gear coupling manufactured from high-quality steel
• Compact design providing high power density
• Compensates for angular, radial and axial shaft misalignment
• Suitable for operating temperatures up to +120°C when fitted with special seals
• Available with split sleeve (ZCA / ZCB, with the ZCA range also available in ZCB design) or single-piece sleeve (ZCH)
• Elastic O-ring can be replaced without moving the coupled machines
• Bore sizes up to 270 mm
• Nominal torque up to TKn = 195,000 Nm and maximum torque up to TKmax = 390,000 Nm
• Maximum operating speed up to 6,000 rpm

Product Specifications