Reducers cut speed and amplify torque — helical, planetary, worm, cycloidal. SEW-EURODRIVE (all-round), Bonfiglioli (IT), Nord (DE, integrated geared motors), Wittenstein alpha (precision planetary), Apex Dynamics and Harmonic Drive (robot joints) lead.
Reducer / Gearbox
Reducer / Gearbox
Reducers cut speed and raise torque — helical, planetary, worm, cycloidal. SEW, Bonfiglioli, Nord and Wittenstein lea...
Reducers cut speed and raise torque — helical, planetary, worm, cycloidal. SEW, Bonfiglioli, Nord and Wittenstein lead; Wittenstein, Apex and Harmonic Drive for robot joints.
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FAQ
Q Helical vs planetary?
A
Helical: low cost, 96-98% efficiency, high reliability — conveying, mixing. Planetary: compact, high torque density, accuracy down to 1-3 arcmin (Wittenstein) — preferred for robots, machine tools, servo.
Q Worm reducer use?
A
High ratio (10-100:1), self-locking, vertical mounting without brake; downside 30-70% efficiency (pressure-angle dependent). Hoists, winches, gates.
Q Cycloidal RV reducer?
A
Two-stage cycloid + needle pin, < 1 arcmin backlash, 6000 h life; robot RV-E series EUR 2000-5000 each, joint core. Nabtesco and Sumitomo lead.