Robot joints and the case for low-torque oil seals

A robot joint packs a motor, a precision reducer and a bearing into a compact actuator. Harmonic reducers are common in arms and wrists; larger RV reducers sit in waists, hips and knees. Each one is sealed where its output leaves the housing.

A standard lip adds friction, and friction turns into heat and lost energy. Spedent's low-torque oil seal uses a special lip structure for more precise running, less friction heat and lower energy use, extending reducer life.

See the robot joints page