Patent ID: 9656365
Date: 2017-05-23
CPC Classifications: B24B

Claim:
1. A rotary machining tool comprising; a) a rotating magnetic coupling having a first cylindrical bore, b) a drive axle having a first primary cylindrical axis and work tool end and a driving end opposite the work tool end, wherein the drive axle is supported by one or more rotary couplings in the rotating magnetic coupling, c) an inner axle having a second primary cylindrical axis disposed concentrically within at least a portion of the drive axle, wherein the inner axle is supported by one or more rotary couplings in the drive axle, in which the first and second primary cylindrical axis are co-incident with a geometric center of the cylindrical bore, d) a magnet coupling means having a portion attached to the outer periphery of the inner axle that is operative to co-rotate the inner axle with the external rotation of the magnetic coupling, e) a tool head coupled to the working tool end of said drive axle, said tool head having a third primary cylindrical axis and comprising, i) a plurality of abrasive members tangential spaced apart about the third cylindrical axis, each abrasive member coupled to a radial positioning means for radial position adjustment from at least partially within the tool head to beyond an outer periphery of the tool head, ii) at least one drive means for coupling torque from the inner axle to the radial positioning means.