08.06.670-523U KEB
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The KEB 08.06.670-523U is part of the Combibox Clutch Brakes series and weighs 8.9 kilograms. This unit features a clutch rated torque of 30 Nm and a brake rated torque of 24 Nm. It has a maximum speed of 3000 rpm and supports input and output configurations with bore in and shaft out.
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Product Description:
The 08.06.670-523U is a combined electromagnetic clutch-brake assembly produced by KEB within the Combibox Clutch Brakes series. In automated equipment, it engages and disengages drive trains on command, allowing precise start-stop positioning and holding a load when power is removed. A bore input with a B5 (2) flange simplifies direct mounting to a motor shaft, while the keyed shaft output uses a B5 (1) flange for connection to the driven machine.
The clutch side transmits up to 30 Nm of torque, while the brake side resists up to 24 Nm without slipping under rated operating conditions. When energized, the clutch coil draws 28 W, and the brake coil requires 20 W, which supports accurate control power supply sizing and cabinet heat management. The armature has an inertia of 8.59 × 10⁻⁴ kg·m², supporting responsive acceleration in indexing applications. Class B insulation permits coil temperatures up to 130 °C for typical industrial duty cycles. A readjustment clearance of 0.7 mm indicates when wear compensation is required to restore the intended response. The separate clutch and brake power requirements also allow each control circuit to be protected according to its electrical load.
The assembly supports operating speeds up to 3000 rpm, providing the rotational range needed for rapid start-stop machinery. Its factory-set air gap of 0.35 mm balances magnetic engagement force with low drag during release. The rotor inertia is 7.78 × 10⁻⁴ kg·m², which affects how quickly the connected shaft decelerates when brake torque is applied. The friction linings can absorb a single-event energy load of 4.8 × 10³ J, after which sufficient cooling time must be provided before another high-energy stop. The assembly has an overall mass of 8.9 kg, allowing it to be supported by a properly sized machine mounting surface. Adequate alignment between the input bore, output shaft, and connected equipment helps prevent uneven friction-lining wear. Proper clearance checks and thermal management are necessary to maintain consistent engagement and release behavior throughout repeated operating cycles.
