Product Description:

The 06.10.640-4000 is a combined electromagnetic clutch-brake unit built by KEB and supplied as part of the Combibox Clutch Brakes series. As a clutch, it connects a driving shaft to a load on demand; as a brake, it decelerates or holds the same assembly when the coil is de-energized. In automated machinery, this arrangement allows cyclic start-stop positioning without reversing the motor, improving throughput on indexing tables, wrapping stations, and other discrete-motion axes.

During operation, the clutch can transmit up to 7 Nm of torque while drawing 15 W from its coil, and the brake provides the same holding capacity while drawing 12 W. The allowable engagement frequency is thermally limited by a clutch friction rate of 81 J/s and a brake friction rate of 59 J/s. These values indicate how many engagements per minute can occur without overheating. The housing tolerates spindle speeds up to 3000 rpm before slip energy exceeds safe limits. The bore-style input accepts plain motor shafts, whereas the single output shaft delivers motion directly to a pulley or gear. The unit has no input or output flanges, and its frame is produced without mounting feet for compact integration.

Magnetic pull is set with a factory clearance of 0.2 mm. Wear increases this gap until the readjustment point of 0.4 mm is reached, after which shimming restores the correct clearance. Low rotating mass supports quick indexing cycles: the armature has a moment of inertia of 0.84 × 10⁻⁴ kg·m², while the rotor has a moment of inertia of 1.07 × 10⁻⁴ kg·m². Because the input shaft is centered by the bore rather than a flange, alignment relies on the adjoining hub. The absence of mounting feet requires an external bracket or bell housing. The brake and clutch coils share the same air gap, so maintaining the stated clearance limits helps preserve consistent response throughout service.