Ringfeder TNZ ZCAU couplings are equipped with an elongated hub, the length of which can be adapted to the plant requirements. TNZ ZCBU couplings are equipped with an O-ring carrier which facilitates installation by changing the mounting sequence. For mounting the coupling you should unscrew the cover and place it on 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. These types of gear couplings have an elongated hub the length of which can be adapted to the plant requirements.

General Features

• Very compact design results in a high-power density

• Suitable for use in temperatures up to +120 °C if special seals are used
• 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 sleeve (ZCA / ZCB - ZCA model range also available in ZCB design) and single-piece sleeve (ZCH)
• The elastic O-Ring can be replaced without having to move the coupled machines
• 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 housings of coupling have a straight internal toothing whilst the hubs have an external toothing with a chased variable radius. Afterwars the hubs have an opportunity to move spatially within the housing and thus compensate axial, angular and radial shaft misalignment of the adjoined shaft ends within specified tolerances. Depending on coupling type and size, the standard toothing permits an angular misalignment of up to 0.5 d. Maximum possible radial shaft displacement depends on the distance between the two toothing planes. 

Material

High-grade tooth profiles and grease with ultra high-pressure additives guarantee low-restoring forces and a long serviceable life. The material used is forged steel with an apparent yielding point of at least 335 N/mm2. Special materials can be used 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.

Special Applications

An examination is necessary in case of greater misalignments at higher speeds and torques. It depend on the determined size. The value T_Kmax  should not exceed in any state of operation (electrical short circuit, blocking, start-up 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.

Temperature

The usage 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 ZCAU / ZCBU 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.