Portable boring machine

A portable boring machine, comprising:

• a machine body;
• a rotation assembly, provided with a coupling ring rotating about a rotation axis, which is configured to allow an integral coupling with a tool-bearing shaft in rotation about the rotation axis;
• an advancement assembly, provided with a carriage movable parallel to the rotation axis, which comprises a fixing means for fixing to the tool-bearing shaft, structured so as to enable the rotation of the shaft about the rotation axis and to be constrained to the shaft relative to the translation along the rotation axis;
• an attachment or insertion device, configured to allow the machine body be attached to an operating support, integral with the part to be machined;
• wherein,
• the carriage and the coupling ring project outside the machine body transversely to the rotation axis;
• the attachment or insertion device comprises a fixed body, integral with the machine body, and a clamping body, removable from the fixed body and clampable to the latter in order to solidly constrain the support and allow the attachment of the machine body to said operating support by means of an insertion movement directed radially relative to the rotation axis.