Reliable and inexpensive

The KM metal bellows coupling from JAKOB Antriebstechnik has proven itself on the market for decades as a reliable and cost-effective standard series of metal bellows couplings. Like all metal bellows couplings, it is rigid in the direction of rotation, but flexible in the axial, angular and radial directions. Despite the similarities, metal bellows couplings are sometimes very different from one another. The technical differences lie, for example, in the choice of bellows or the type of connection between bellows and hub or bellows and shaft. For example, JAKOB only uses thin-walled, multi-layer bellows made from certified stainless steel sheets. This results in high torsional stiffness. This ensures high positioning and concentricity accuracy even under difficult conditions, guaranteeing absolutely backlash-free torque transmission between the input and output shafts. The multi-layer bellows design also ensures that large shaft misalignments can be absorbed with low restoring forces. This means increased reliability, operational safety and service life.

The clamping hub of the KM is equipped with the innovative Easy-Clamp system, which enables simple sliding on with sufficient fitting clearance. The preload force required for torque transmission is ensured by a single, radially accessible screw per hub. This simple and reliable connection allows uncomplicated installation in a few simple steps, even in confined spaces. In order to achieve the lowest possible mass moment of inertia, the hubs are made of high-strength aluminum.

The bellows and hub are connected using the backlash-free crimping process. In contrast to bonded connections, this joining method is permanently resistant to critical operating conditions (-40°C to +200°C, chemicals, etc.) and can safely transfer the transmission torque of each bellows position to the hub.

Metal bellows couplings from the KM series are available with nominal torques from 0.4 to 1300 Nm.