Handheld machining device, particularly for drilling

A handheld machining device (1) for drilling having a mechanism comprising:

• a first mounting (20) which carries:
• a tool holder (2),
• a motor (3, 4) arranged to rotate the tool holder (2),
• a second mounting (30) and a sliding connection between the first mounting (20) and said second mounting (30),
• a linear actuator (5) enabling the first mounting (20) to be spaced apart from the said second mounting (30) and the first mounting (20) to be brought toward said second mounting (30),
• wherein the motor (3, 4) is an electric motor having a stator (3) and a rotor (4), the rotor (4) of the motor (3, 4) is directly mounted onto the tool holder (2), rigidly integral with said tool holder (2), configured so that:
• the rotation ratio between tool holder and rotor is 1/1 and
• the tool holder and rotor are the same rigid assembly such as that there is no misalignment between tool holder rotation axis and rotor axis,
• said motor (3,4) is a brushless electric motor of a voltage that is less than 48 volts and has a power/weight performance greater than 5 W/g, and
• wherein the device (1) is configured to be handheld.