Shaft cooling for a machine tool motor spindle

The invention relates to a (1) is a tool motor core shaft (2) and a cooler, the shaft cooler (1) with the rotating shaft (3), the nozzle (4) and at least one with cooling agent inlet (5) and cooling agent outlet (6) refrigeration system (7); the shaft in a horizontally, namely, making the carry out (4) (8) via the cooling hole from inside to outside to reach to the static nozzle cooling medium filled into the rotating shaft (3).