The present invention is a pneumatically driven oscillatory motor. It features fan gear with an eccentrically mounted hub which imparts a wobbling motion on a bearing and associated collar. This wobbling motion then translated in to a vertical oscillatory motion of a collar arm extending radially from said collar. Additional structures to direct flow of expelled air are also provided. The collar arm may be removable from the collar. The motor has many applications where oscillatory motion is required, such as in tattoo needles.