Demanding servomotor applications with high reverse loads and precision positioning need couplings with zero backlash and high torsional stiffness. A new generation of ServoClass couplings from Zero-Max, Plymouth, Minn., (zero-max.com) meets those needs. As cycle times shorten, wind-up in-beam couplings and the fragile nature of bellows couplings become a serious problem. ServoClass couplings, however, respond reliably under such high speeds.

They are made of RoHS-compliant materials containing no banned substances and are designed with 304 stainless-steel disc packs, and 7075-T6 aluminum hubs and center members. High torsional stiffness with low inertia eliminates system resonance in many servo systems.

ServoClass couplings handle system speeds to 10,000 rpm with a torque rating from 4.43 lb-in. (0.5 Nm) to 530 lb-in. (60 Nm). They are available in 16 sizes of inch and metric hub bores. All models and sizes feature clamp style mounting hubs with recessed, corrosion resistant clamping bolts.