FIELD: machine building.
SUBSTANCE: invention refers to rotary drive of manual and machine tool actuated with compressed medium. The rotary device has an output adaptor for connection of the device to a source of compressed fluid medium, a reactive turbine rotor and an input channel. The input channel ensures communication of fluid medium between the input adaptor and the rotor and consists of the first end near the input adaptor and of an orifice downstream the first end. Also, the channel has in essence the same area of the cross section in an interval between the first end and the orifice.
EFFECT: increased power of rotary device.
9 cl, 1 dwg
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