DEVICE FOR MILLING THE OPENINGS

Device for milling the openings contains housing, lead-in part of which is equipped with an even quantity of end-milling cutters. In this case, each pair of cutters located on opposite faces of the housing is connected with the ends of shaft located in the housing on frictionless bearings and cinematically connected with the drive of cutters. The thrust bearings are located between the housing and the cutters, against which the cutters are forced by set screws. A depression is executed on the half of the race of ring of thrust bearing contacting with the housing. On the section of housing being opposite to the contact part, an elastic element with possibility of forced pressing of cutter against the section of depression is executed.