BK3 flexible metal bellows coupling

The BK3 is a metal bellows coupling from R+W, a series of torsionally stiff, backlash-free couplings for precise power transmission. The stainless steel bellows allows compensation for axial, lateral and angular misalignment while keeping high torsional rigidity, which is vital for servo drives, encoders and positioning systems. Clamping hubs provide a friction-locked and backlash-free connection to the shafts. The BK3 sits in the lower torque range of the BK family, and sizes are chosen according to nominal torque and shaft diameter. Typical applications include machine tool feed drives, packaging machines, robotics, measuring systems and other high-dynamic positioning axes.