ZF-Single-disc
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Innovations Of great Value Single-Disk Clutches and Single-Disk Brakes ZF-Single-disc Einflächenkupplungen und -bremsen ZF-Single-Disc

ZF is a Worldwide Leading Automotive Supplier of Driveline and Chassis Technology. We develop and manufacture innovative, high-quality products and related technologies that improve the mobility of people and goods. Our products and services offer our customers clear added value through leading technologies, quality, and service. Our passionate commitment to achieving greater efficiency and resource conservation has made us a trendsetter in new markets. We believe in fair and reliable business practices everywhere we operate, and our global reach ensures our customers a tight-knit network...

A motivated and skilled workforce is our most important asset and a decisive success factor at ZF. We offer all of our employees outstanding opportunities for advancement with regard to their skills, performance, commitment, and mobility. ZF maintains an open dialog with its employees and employee representatives. We proudly work together to make ZF a successful company and view our employees as team members who can be successful only if all work together toward the same goals, throughout all divisions, and across all borders. We respect the business ethics and legal standards of the...

Thanks to their technical advantages, their respectively simple setup, and their opportune outside dimensions, electromagnetically operated singledisk clutches and brakes are increasingly used for the automation of mechanical working processes in mechanical and plant engineering, like for instance in textile machines, packaging, printing, and paper machines, machine tools, welding machines, or in medical technology, and for actuating speed or velocity stages, for controlling sequences of motion with exact positioning, or for the safe shutdown of a machine in case of faults/disruptions. The...

Single-disk clutches The clutch consists of a static magnet body with coil, rotor, and armature disk. The magnet body is attached to a part of the housing while the rotor is mounted to one of the shafts to be coupled. It turns with a low radial air gap in the static magnet body. The torque between rotor and armature disk is transferred without clearance. For this purpose, the armature disk is bolted to a diaphragm spring which is attached to the front side of the part that drives or is driven by means of three bolts. Thanks to axial deflection, the diaphragm spring enables the armature...

Installation and design Dry operation: In dry operation, single-disk clutches and brakes have high torques and short shifting times. The values are listed in the selection tables. To reliably achieve the torques specified in the tables, a running-in procedure with some revolutions at differential speed are required. The friction surfaces, however, are subject to wear in shift operation. This results in a limited service life which can be determined depending upon the shifting capacity. If low quantities of oil or grease contaminate the friction surfaces in dry operation, the torques...

In case of the clutches, the torque is transferred to the shaft by means of parallel keys according to DIN 6885, sheet 2. The rotor shall be axially fixed on the shaft. The magnet body is screwed onto a static part of the machine. In case of the brakes, the brake torque bears against this part of the machine by means of the magnet body anchorage. The clutches and brakes might be installed horizontally or vertically. The armature disk can either be mounted above or below. Installation tolerances, permissible center offset: Between rotor and magnet body, a radial air gap shall be maintained...

Installation of armature disk The armature disk is screwed onto the fitting at three points (flange, belt pulley, or similar). For this purpose, corresponding through holes in the diaphragm spring as well as cavities for the bolt heads are provided. Cylinder head screws according to DIN 84 or with hexagon sockets according to DIN 7984 or DIN 6912 are to be used. Threadlockers on the diaphragm spring are not possible; thus, the bolts must be secured by means of glueing, caulking, or by using a lock nut. When the armature disk is installed, the diaphragm spring is preloaded in axial...

Electrical connection Power supply The single-disk clutches and brakes are operated with direct current. Generally, the nominal voltage amounts to 24 V. The permissible supply fluctuations shall not exceed +/- 10%. Spark absorbers are to be installed according to the regulations in any case. To avoid harmful voltage peaks when switching off, it is recommended to use suitable spark absorbers (e.g. voltage-dependent resistors). Switching on and off The VDE provision no. 0580 is the basis for the definition of circuit symbols and torques. According to this provision, the switch-off time is the...

Armature disk with mechanical preloading without countersinking rivet heads in counterpart Center offset of brakes Type Electromagnet type of single-disc brakes

Torque transmittable Mu [Nm] Mass moment of inertia armature side J kgcm2 shifting times coil temperature Response Ramp-up

Weight Order number

Shifting times Response Ramp-up on delay time Technical data Order number

Research and Development to Secure Mobility Innovations are not a purpose in themselves for ZF; they must pay off, for manufacturers, fleet owners, and drivers, but also for the environment and society. Each new development must prove itself among the conflicting priorities of these criteria. The ZF Group benefits from an international network innovative products from ZF set the standards for of development centers: The main development state-of-the-art technology – again and again. locations are Friedrichshafen, Dielingen, Passau, Development work at ZF is organized according to...

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