Drill Machine 20 MM MT3

It is essentially a proxy for the continuous torque the machine is capable of producing. Typically a given drill will have its capacity specified for different materials, i.e., 10mm for steel, 25mm for wood, etc.13mm (1/2 inch) Quite simply, the larger your chuck size, the larger shank diameter it will accept. Generally, if you want to drill holes larger than 20mm in diameter or drill into materials such as metal, then consider purchasing a drill driver with a 13mm chuck, to accommodate larger bits.M2 tool steel drill rod is the most commonly used grade of the high speed category. It is a molybdenum tungsten grade with excellent toughness, wear resistance and red hardness, making it preferable in applications where it is exposed to high heat condition from high machining speeds.