Precision machining device, for cylinder running surfaces, has hollow tool drive spindle, traction rod, and electronic control unit controlling traction rod

摘要

The precision machining device has a hollow spindle (5) driving the tool (6). A traction rod (16) coupled to a spreading body (21) passes through the spindle cavity, so that the base body (9) can be widened. There is an electronic control unit (18) to control the traction rod. This rod may be operated by a step motor (17).