Reamer and blade therefor

A reamer comprising a body having head with an anxially recess therein with a planar reamer blade mounted therein, the blade being substantially square and having a front face with four cutting edges extending along the sides thereof and a rear face having a plurality of serrations thereon comprising two sets of intersecting serrations, each set of serrations extending substantially parallel to two of said cutting edges and normal to the other two of said cutting edges and extending fully across the rear face of the blade, the blade being mounted on the reamer with a cutting edge extending axially of the reamer and the serrations on the rear face of the blade mutually interengaging with radial serrations on the reamer to secure the blade against axial movement.

A method of securing a blade as within a reamer having an axial recess in the body of the reamer, and the blade being substantially square and having a front face with four cutting edges extending along the sides thereof and a rear face having a plurality of serrations thereon comprising two sets of intersecting serrations, each set of serrations extending substantially parallel to two of said cutting edges and normal to the other two of said cutting edges and extending fully across the rear face of the blade, wherein in said method the cutting blade is clamped within the recess to mutually interengagable parallel serrations provided on the reamer and which extend radially thereof, with a cutting edge of the blade extending axially of the reamer being radially adjustable to a new position by movement of the blade along the radial serrations using a single adjuster means.