| 摘要 |
PURPOSE:To improve grindability and cooling capacity ever so better, by feeding a coolant solution fed out of the hole of a wheel flange to a blow hole of a grinding wheel under pressure. CONSTITUTION:A coolant solution 3 passes through a hole 4a of a spindle 4 and fed to the inside of a grinding wheel 6 under pressure via a hole 5a of a flange 5. And, the coolant solution 3 is discharged to an outer circumference of the grinding wheel 6 by dint of turning centrifugal force in the wheel 6 and washes clean the inside a blow hole, removing chips and the like therefrom. As a result, sharpness in the grinding wheel 6 comes to being favorable all the time, thus a heating crack or the like in time of grinding is preventable.
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