Patent ID: 8397832

Claim:
A hand tool machine comprising: a housing; a drive motor arranged within said housing; a motor shaft driven rotatingly by said drive motor; a working spindle received within said housing and having a receptacle configured for receiving a tool; and an oscillatory drive gear driven by said motor shaft configured for oscillatingly driving said working spindle about a longitudinal axis thereof; said oscillatory drive gear comprising: a wobble bearing arranged on said motor shaft, said wobble bearing comprising a coupling element having a closed guide surface revolving around said motor shaft; at least a first driver guided for translatory movement; wherein said first driver at one end thereof engages said closed guide surface of said coupling element; and said first driver engages said working spindle at a circumferential region thereof for oscillatingly rotating said working spindle about a longitudinal axis thereof when said first driver is moved back and forth by said coupling element.