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OttobockPassive friction elbow for positioning during bimanual tasks, with one-hand push adjustment.
Materials & Highlights
Not every fitting needs active elbow flexion; many transhumeral and bilateral users want a positioning joint they can nudge with the sound hand or against a table edge. The MotionArc holds any angle across its 140-degree range through smooth, settable friction — firm enough to carry a grocery bag, light enough to reposition with one push.
Friction comes from opposing composite discs preloaded by a calibrated spring stack, adjustable with a flat screwdriver through the lateral port. The housing is machined aluminum at 295 g with standard lamination collar mounting and an optional spring-lift assist that offsets terminal-device weight.
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