Abstract
Generally, human hands are more dexterous and powerful than robot hands. It is very difficult that robot hands obtain these characteristics simultaneously. The hydraulic remote drive system may have the possibility to satisfy this requirement. A plunger pump was connected to a cylinder mounted in a finger. The cylinder output force is exaggerated by the cross section area ratio of the cylinder and the plunger. The diameter of the cylinder was limited to 10 mm. The experimental data shows that the plunger diameter is limited to 2 mm by the buckling characteristic. The maximum force exaggerating ratio was to 25.