B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
B24B15/08—Machines or devices designed for grinding seat surfaces; Accessories therefor for grinding co-operating seat surfaces by moving one over the other
Control system for expanding small diameter abrasive tool - comprises limited torque mechanism between drive which rotates abrasive tool rod, and fixing which holds rod to control system