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A radial drill press has an extended arm for drilling large workpieces. It allows movement in multiple directions and can drill non-vertical holes. Large industrial machines have large drill bits and cooling systems, while smaller DIY versions have similar flexibility.
A radial drill press is a machine tool that has an extended arm or beam along which a drill head can be moved to conveniently drill holes in large or bulky workpieces. A radial drill press allows the operator to advance the drill head along the extended machine arm, rotate the arm in an arc, or tilt the drill head to drill at an angle. A wide range of radial drill sizes are available; large examples of machine shops typically equipped with large drilling capacities and bit cooling systems.
A drill press is a tool that allows for extreme precision in drilling operations. In a typical drill press operation, the drill head moves up and down to drill holes using a rotating handle and toothed bar. This allows the drill head to move vertically while maintaining perfect horizontal and vertical orientation. The result of this arrangement is increased power over the drill stroke due to the mechanical advantage involved and the drilling of perfectly straight holes. The disadvantage of this system is the small working area which requires constant moving of the work piece if multiple holes require drilling; it also limits the possible size of the workpiece.
A radial drill press solves these challenges by allowing movement of the drill head in several additional directions while maintaining vertical alignment. This flexibility is achieved by including an elongated beam or carriage along which the drill head can be moved. This carriage can also rotate in an arc around the main column of the drill press, thus allowing a very large area to be covered. Also, most radial drill presses allow you to tilt the drill head and then lock it to drill holes in non-vertical orientations. This extended motion flexibility allows you to drill multiple holes in very large workpieces without the need to constantly move the workpieces.
Heavy industrial radial drill machines usually come with chucks capable of accepting very large four inch (101.6 mm) capacity drill bits which are common on larger examples. Drill bit cooling is also commonly provided with the fitting of coolant tanks, pumps and nozzles. Smaller do-it-yourself (Do It Yourself) radial drills are also available and feature most of the flexibility of their larger machine shop brethren. These smaller units usually come with standard drill press table mounts and vise tables.
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