Drilling device with oil supply unit

A drilling device with an oil supply unit, comprising:

• a fixing member configured to be removably fixed to a workpiece;
• a column extending upward from the fixing member;
• a tubular slide unit provided around the column so as to be slidable along the column;
• a tool body connected to an upper end portion of the tubular slide unit;
• and,
• an oil supply tank provided between the tool body and the fixing member and removably fixed to the tubular slide unit,
• wherein the tool body includes a cutting tool and a cutting oil supply passage which has a cutting oil inlet for receiving cutting oil from the oil supply tank and feeds the received cutting oil to the cutting tool, the cutting oil inlet being directed downward toward the fixing member;
• wherein the oil supply tank has a cutting oil outlet directed upward and fluidly connected to the cutting oil inlet;
• the oil supply tank being configured to be moved toward the tool body, which has been displaced upward on the column, from a lower side of the tool body while the cutting oil outlet is aligned with the cutting oil inlet in a vertical direction so that the cutting oil outlet of the oil supply tank is connected to the cutting oil inlet of the tool body.