Patent ID: 6802678
Filing Date: 2004-10-12
Classification: B23B,B23G,Y10T

Abstract:
Tapping unit, including:a casing adapted to be fixed facing a part to be machined on a support of a machine tool and having an interior housing, a pattern including a bush with a tapped bore inserted axially in the interior housing of the casing and prevented from rotating by immobilizing means, a tap-carrier including means for receiving and retaining a tap, having a threaded section functionally engaged in the tapped bore of the pattern, and having a drive section, a drive shaft, rotatably mounted in the casing, having a bore receiving the drive section of the tap-carrier, which is adapted to slide longitudinally in it, and driven in rotation by a mechanical transmission driven by a motor, means which allow slight and limited radial movement of the tap in the casing about a mean radial position, and means which allow limited axial forward movement of the tap toward the exterior of the casing from a reference position and against the action of advance return spring means.