An abrading apparatus suitable for abrading a workpiece with a rotating abrading member or members, the abrading apparatus comprising: - a rotating shaft balancer adapted for balancing the rotating motion of the rotating abrading member or members, the shaft balancer comprising a protruding balancing element , - a spindle attached to the shaft balancer , and - a housing adapted to prevent abrading debris from spreading to the surrounding environment, which housing comprises as recessed spaces: - a spindle bearing chamber which houses at least a part of the protruding balancing element of the shaft balancer , and which spindle bearing chamber is defined by a spindle bearing chamber wall , and - at least one suction chamber defined by an inner suction chamber wall and an outer suction chamber wall , the suction chamber adapted to controllably collect and extract abrading debris, the housing having a clearance between the rotating abrading members and the housing , the abrading apparatus being characterized in that the spindle is attached to the shaft balancer via a spindle bearing to which spindle the rotating abrading member or members are releasably attached with a fixing or fixings , wherein the housing comprises at least two conduits extending from the spindle bearing chamber wall to the inner suction chamber wall , the conduits being adapted for cooling the spindle bearing by conveying air between the spindle bearing chamber and the suction chamber . - a rotating shaft balancer adapted for balancing the rotating motion of the rotating abrading member or members, the shaft balancer comprising a protruding balancing element , - a spindle attached to the shaft balancer , and - a housing adapted to prevent abrading debris from spreading to the surrounding environment, which housing comprises as recessed spaces: - a spindle bearing chamber which houses at least a part of the protruding balancing element of the shaft balancer , and which spindle bearing chamber is defined by a spindle bearing chamber wall , and - at least one suction chamber defined by an inner suction chamber wall and an outer suction chamber wall , the suction chamber adapted to controllably collect and extract abrading debris, - a spindle bearing chamber which houses at least a part of the protruding balancing element of the shaft balancer , and which spindle bearing chamber is defined by a spindle bearing chamber wall , and - at least one suction chamber defined by an inner suction chamber wall and an outer suction chamber wall , the suction chamber adapted to controllably collect and extract abrading debris, the housing having a clearance between the rotating abrading members and the housing , the abrading apparatus being characterized in that the spindle is attached to the shaft balancer via a spindle bearing to which spindle the rotating abrading member or members are releasably attached with a fixing or fixings , wherein the housing comprises at least two conduits extending from the spindle bearing chamber wall to the inner suction chamber wall , the conduits being adapted for cooling the spindle bearing by conveying air between the spindle bearing chamber and the suction chamber . <EOS>