TNZ ZCAUU couplings manufactured by Ringfeder are torsionally stiff gear couplings designed to have some backlash. TNZ ZCBUU gear couplings come with a bolt-on O-ring carrier which facilitates installation by changing the mounting sequence. For mounting the coupling you should unscrew the cover and place it onto the shaft. Afterwards the hub should be mounted onto the shaft, slide the sleeve onto the hub and fasten the O-ring carrier to the sleeve. Mounting implementation in this way is much more profitable if large couplings are involved. They both are made of high-quality steel and are suitable for use in temperature up to +120 °C if special seals are used. They have two elongated hubs the length of which can be adapted to the plant requirements.

General Features

• Bores up to 270 mm

• Speeds up to nmax = 6,000 rpm
• Torques up to TKn = 195,000 Nm / TKmax = 390,000 NmSuitable for use in temperatures up to +120 °C if special seals are used
• Very compact design results in a high-power density
• The elastic O-ring can be replaced without having to move the coupled machines
• Torsionally rigid gear coupling made of high-quality steel
• Compensates for angular, radial and axial shaft offset
• Available with split sleeves (ZCA / ZCB - ZCA model range also available in ZCB design) and single-piece sleeve (ZCH).

Toothing

The coupling housings have a straight internal toothing, and the hubs have an external toothing with a chased variable radius. With the help of the following, the hubs can move spatially within the housing  compensating radial, angular and axial shaft misalignment of the adjoined shaft ends within specified tolerances. According to the type and size of the coupling, the standard toothing permits an angular misalignment of up to 0.5 degrees per toothing-plane and an axial movement of several millimetres. The maximum radial misalignment depends on the distance between the two toothing planes.

Materials

High-quality grease is used to extend the life of couplings. The material used is forged steel with an apparent yielding point of at least 335 N/mm2. There can be used special material for the special 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.

Special Applications

In the case of greater misalignments at higher speeds and torques, an examination is necessary, performed with the assistance of a special computing programme. It depends on the constant size. The value TKmax may not be exceeded in any state of operation, such as blocking, start-up, electrical short circuit and so on.

Tolerances and Standards

The bore tolerance is ISO H7, if not differently ordered. 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 ZCAUU / ZCBUU 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.