MAKING THE CHAMBERING REAMER

The chambering reamer is no different in grinding than the barrel reamer, except there are more angles,
etc. First look at the following drawings to see how the to turn the tool steel blank to shape. The blank
does not have to have the angles turned on as shown in the drawings; this will be done during the
grinding process.

Leave all diameters about .020 larger than shown. The tool steel blank should be cut 6 1/2 to 7 inches
long. Use the smallest center drills for center drilling the blank. When turning the shoulder can be left
square, but there should be a recess cut in front of the shoulder, end of neck, etc. for clearance when
grinding.

ANGLE CUTTERS FOR MILLING FLUTES

The flutes should be milled with a 60-degree x 1 7/8-inch angle cutter. This should be used on all fluting
of reamer blanks. The blank should be set up in the indexing attachment on the mill.