Hero RGD

Hero RGD is a myoelectric prosthetic hand from Open Bionics in Bristol, sold through prosthetics clinics rather than to robot builders, yet its ruggedness makes it a useful benchmark. Five brushless motors, one per finger, are joined by a motorised thumb rotation; the maker does not state a DOF count. The complete system including battery, cables, wrist and EMG sensors weighs 576 g, or 1.27 lb.

The brochure quotes 80 N of grip force, 25 N per finger, a 0.4 s close and a carrying load of 34.9 kg, or 77 lb, on the titanium wrist pin. The fingers are sprung and fitted with slip clutches to survive knocks. Materials are nylon PA12, stainless-steel finger joints and a TPU palm; the wrist flexes 45 degrees either way and rotates 360 degrees manually.

The brochure rates the hand IP67, the website IPX7 for the full system with the Hero FLEX socket. MyoPod EMG electrodes drive seven grip modes, updates arrive wirelessly, charging is via USB-C, and the warranty runs three years. The maker's FAQ gives a starting price of USD 5,999 for the product line without singling out this model, so the RGD itself is priced through the clinic.

Within the catalog, Ability Hand is the closest comparable prosthesis.