The boring head includes a U-axis (115) driven by a motor (116), and a sensor (138) generating a signal representative of the rotational speed of the boring head.
Using the boring head the number of machining operations required to produce an accurate bore is reduced, sometimes to a single operation.
In the present invention, a boring bar (113) with a tool tip (114) carries strain gauges (128 to 130) and is part of a boring head (110).
Said boring head is characterised in that the means (5) locking the tool-holders (3) in operational position consists of a single clamping device simultaneously acting on the two tool-holders (3) and on the body (1).
The drill head (2) has a machining surface that is the front face thereof.
The drill comprises a shaft (1) having a drill head (2) disposed on the end thereof.