What criteria should I use to select the right core drilling machine?
Question:
What criteria should I use to select the right core drilling machine?
Answer:
The forward/reverse rotation and electronic speed adjustment of the KBM / KBU enable direct and precise tapping. The machines' large stroke range allows for tool changes without having to remove the machine from the workpiece.
The selection of the right machine must take into account the work location, accessibility, application, drill diameter, material thickness, and number of drill holes.
For on-site and construction work, a small, lightweight machine is required. If maximum mobility is also required, a cordless magnetic core drill is recommended. For work in the workshop, a somewhat larger and heavier magnetic core drill is usually used, as mobility and long transport distances are less important in the workshop.
If the machine is needed exclusively for core drilling, a machine with a forward rotation and a small stroke range (KBE) is sufficient. If you want to perform universal work in addition to core drilling, such as twist drilling, tapping, reaming, and countersinking, you need a machine with reverse rotation, speed adjustment, and a wide stroke range (KBM, KBU).
The most common core drilling diameters for carbide and high-speed steel in steel and metal construction range from 16 to 32 mm. A machine with a maximum drilling capacity of 35 mm is sufficient for this. Larger drilling diameters are predominantly required for work in mechanical engineering, boiler/container construction, or even shipbuilding.
Material thicknesses up to 50 mm can be achieved with all FEIN core drilling machines (except AKBC 36 MAGFORCE and KBC 36 MAGFORCE: only 35 mm). For material thicknesses > 50 mm, machines with a MT tool holder are required. A shank available as an accessory enables cutting depths of up to 75 mm (even up to 100 mm with the KBU 110). If 75 mm or 100 mm cutting depths are still not sufficient, the MK tool holder also allows you to use commercially available twist drills with various cutting depths.
For serial core drilling work and large drilling volumes, the use of an automatic machine (KBM 50 AUTO QW / KBM 50 AUTO) is recommended. This relieves the operator of the burden, as they only perform a control function. Furthermore, the service life of the core drills is increased, as optimal feed force and feed speed are always maintained. For occasional work and manageable drilling volumes, a manual core drilling machine is generally used.
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