Why does my core drill rattle or whistle when I place it on the material to be drilled, and what should I bear in mind when setting up the machine?
Question:
Why does my core drill rattle or whistle when I place it on the material to be drilled, and what should I bear in mind when setting up the machine?
Antwort:
You will find instructions on how to set up the magnetic core drilling machine correctly in the operating instructions for the respective machine.
If the core drill rattles or whistles when placed on the workpiece despite the machine being set up correctly, check the speed settings and the feed force used. If the speed is too high for the material to be drilled, the cutting edges of the core drill will not engage with the material.
Ensure sufficient cooling lubrication on the core drill. Check the cutting edges of the core drill.
Ensure that the surface for the magnetic base is level, clean and rust-free. Remove paint and filler layers.
When working on steel materials with a lower material thickness, the workpiece must be reinforced with an additional steel plate to ensure the magnetic holding force. The minimum material thickness can be found in the operating instructions for your machine. The additional steel plate must be attached by spot welding or with clamps.
A vacuum plate (order number 92602057017) and vacuum pump (order number 92601022013) are required for structured surfaces (checker plate, tear plate).
A suction plate (order number 92602054016) is required for anti-magnetic workpieces (stainless steel, copper, etc.) and flat surfaces.
The guides on the drill stand must be set without play. If this is not the case, contact your authorized FEIN workshop or FEIN Service.