Patent ID: 8540716

Claim:
A disposable low cost reamer shaft for a spherical or tapered hollow reamer assembly for medical applications, comprising: a. the disposable reamer shaft made from a precision sized rod or tube; b. said rod being glued with precisely machined attachment pieces, one on each end, using a fixture that aligns centerlines during gluing; c. one end of said rod or tube receiving a first attachment piece made to fit a modular spherical or tapered hollow reamer; d. a second end of said rod or tube receiving a second attachment piece made to fit to a chuck of a power drive; e. a support located on said reamer shaft proximate to said first attachment piece, said support and said first attachment piece being appointed to engage with said modular spherical or tapered hollow reamer, thereby providing two displaced attachment locations in order to align and attach said reamer shaft to said modular spherical or tapered hollow reamer; and f. said first attachment piece having male or female threads that are adapted to connect to threads located on said modular spherical or tapered hollow reamer; whereby the reamer shaft provides precise alignment of the centerline of the reamer shaft with that of the modular spherical or tapered hollow reamer.