...6 More. And I DO use a Micrometer (Should be Known as a 'MICRO-Inch). And I use a Dial Caliper...to check Both. Calibrated to a 1.0000" Gauge Block, the Micrometer reads 0.0010" OVER the 1.3800" O.D.
I No Longer use a 17mm Reamer to obtain 0.67150" (After Sanding and Polishing with Emery Cloth). The reamer will only cut to 0.6700" NOT Large enough for the Shaft that is AT 0.6700", since Two Objects cannot Occupy the Same Space at the same time.
I used a 'Single-Point' Boring Bar to cut the I.D. to fit the Gage (see Pic). This is The MOST Accurate operation to Bore, as the Tip Is NOT Influenced by Multiple Cutting Edges! The Gage is a 0.67001" to Match the ZF Shaft. The Tool is fed (out) to Cut to the Desired 0.67150" On the Dial Every .001" OUT, is Doubled as is the Design of the Lathe, and Cuts .002", Theoretically! There are always, many Surprises! The Bronze Wears the Tool Cutting Edge, Fast! And Then...'Tool Push". The Work and Tooling, gets Hot and Cools, in Cycles.
Enjoy the Photos Tammy and All.
