Precise hsssc manufactures offers a liquid cooled drilling spindle. , model sc-52. 2- or 3-phase spindles are driven by ssolid-state frequency converters drive model sc-52. 2- or 3-phase spindles. These compact units are particularly economical bbecause of the, thanks to their high speeds, extremely quiet running, minimal speed variation under load the compact units are economical and the employment of modern cutting tool materials machining cycles can be drastically shortened. These ball-bearing mounted high frequency precision spindles find its application in are used principally in pcb production .