Welding gun with debris removal and motor cooling

A welding gun comprising:

• a handle portion comprising a motor configured to move electrode wire through the welding gun;
• a diffuser comprising an interior chamber and a plurality of openings defining exit passages from the interior chamber to an exterior of the diffuser;
• a barrel located between the diffuser and the handle portion and connecting the diffuser to the handle portion and configured to supply shielding gas to the diffuser from the handle portion;
• and
• a contact tip extending from the diffuser, comprising a front portion, a rear portion, and a contact tip bore extending therethrough configured to receive electrode wire, the rear portion of the contact tip further comprising an angled outer surface defining a diffuser insert that is configured to direct debris from within the interior chamber of the diffuser towards the exit passages to thereby discharge the debris to the exterior of the diffuser,
• wherein the handle portion is configured to direct a flow of the shielding gas over the motor thereby cooling the motor during a welding operation.

A welding gun comprising:

• a handle portion comprising a motor configured to move electrode wire through the welding gun;
• a diffuser comprising an interior chamber and a plurality of openings defining exit passages from the interior chamber to an exterior of the diffuser, the exit passages being utilized as gas passages for shielding gas used during a welding operation;
• a barrel located between the diffuser and the handle portion and connecting the diffuser to the handle portion and configured to supply the shielding gas to the diffuser from the handle portion;
• a contact tip extending from the diffuser and removably coupled to the diffuser, the contact tip comprising a front portion, a rear portion, and a contact tip bore extending therethrough configured to receive the electrode wire;
• and
• a diffuser insert disposed within the interior chamber of the diffuser, comprising an insert bore extending therethrough with a first end having a diameter substantially similar to a diameter of the electrode wire received within the insert bore, and an outer surface configured to direct debris from within the interior chamber of the diffuser towards the exit passages to thereby discharge the debris to the exterior of the diffuser,
• wherein the handle portion is configured to direct a flow of the shielding gas over the motor thereby cooling the motor during the welding operation.