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

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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 clutches...

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 stroke...

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 decrease...

General information: In case of the clutches, the torque is transferred to For centering, diameters D 3 and D 4 are provided at the shaft by means of parallel keys according to DIN the magnet body. The centering on a rolling bearing 6885, sheet 2. The rotor shall be axially fixed on the in D 3 is advantageous since the axial position of the magnet body to the rotor can be determined at the The magnet body is screwed onto a static part of same time. The armature disk is only centered by the machine. In case of the brakes, the brake torque using the 3 clamping bolts. It shall not be centered bears...

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 direction....

Electrical connection Power supply The single-disk clutches and brakes are operated The residual torque is the highest final value after with direct current. Generally, the nominal voltage switching off at operating temperature. The dia- amounts to 24 V. The permissible supply fluctuations gram below shows the torque curve of switching shall not exceed +/- 10%. Spark absorbers are to be on and off. After the response delay t11, the enga- installed according to the regulations in any case. To gement torque Ms is generated during the time t12. avoid harmful voltage peaks when switching off, it...

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

Torque Torque Maximum Mass moment Power consumption at engageable transmittable speed of inertia coil temperature Shifting times Response Ramp-up delay time EB-ER 0.5 EB-ER 1 EB-ER 2 EB-ER 4 EB-ER 8 EB-ER 16

Weight Order number

Shifting times delay time Order number

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