A magnetic drilling machine is used for cutting holes in metals on the worksite. It is a portable drilling machine with a magnetic base (electromagnetic or permanent magnet base) and a cutting tool attachment. Equipped with a strong magnetic base, the portable magnetic drilling machine is able to adhere to steel or other magnetic materials (ferrous metal) surface horizontally, vertically, or upside down.
What is a step drill? A step drill, also known as stepped drill bit, step drill bit or step bit, is used for drilling a hole or enlarging an existing hole in thin sheet metal. Not only drilling, a step drill also can chamfer and deburr the cutting edge of workpiece by using the bevel of the next step.
A hole saw or hole cutter consist of steel cylinder mounted on anarbor and construction with power drills to cuta circular hole through a workpiece.Most hole saws have fairly short aspectratio of diameter to depth and they areused to cut through relatively thin workpieces .
Since an annular cutter removes only the material at the periphery of the hole, it is 3 to 4 times faster than twist drill bit. Besides, an annular cutter with pilot pin can finish a hole by one operation without pre-drilling for a pilot hole.
For construction industry or house renovation, drilling concrete is unavoidable. When drilling a hole into concrete, there is a high chance to encounter the concrete-embedded rebar. The rebar steel can be an obstacle for a standard hammer dill bit to drill through.