The BDS clamping devices for magnetic drilling machines are suitable for drilling tubes with a diameter from 80 to 250 mm and 150 to 500 mm. Flexible and quick clamping is possible in any drilling situation for magnetic drilling machines. The clamping device for magnetic drilling machines with swiveling V-blocks is fixed on the tube by means of tension chains. The drilling position on the tube can be adjusted easily and safely. The range of application of the magnetic core drilling machines of the ProfiPLUS series is significantly increased by these devices.