...This is How I Machine The Bearings to Absolute 'Zero Error' Concentricity and Axial Alignment. These Techniques were Perfected over Years of Training and Experience. It Separates the Amateurs from the Professionals!
There are NO Short-Cuts!
There are NO 'Fast' Operations!
I counted them Once, I believe there are 18 'Basic' Operations! NOT Counting Dozens of Measurements and Calculations, Tool Changes/Adjustments and Tool Sharpening!
Here are 8 Photos, And why these are Expensive.
This Pilot Bearing just Shipped out Today to William W. in Phoenix, Arizona.
...From a Cored Bar of SAE 841 Oil Impregnated Sintered Bronze 'Oilite'.
Faced-Off and Rough Turned to .050" from Finished Diameter, then Single Point Boring to .030" short of .6690"/.6700" The Reamer cuts to .66950 (17MM)
The Bar has to hang-out from the Chuck Because it is Larger than the 'Hole Through Spindle'. To assure Concentricity is Not Lost, the Work is Constantly Check with a Dial Indicator, and supported with a 'Live' Center, until the Point off Parting-Off.
Single-Point Boring is Absolutely Accurate!, because it is Not Influenced (pushed Off-Center) by Opposing, Multiple Cutting Edges.
This, again, is a Must, to set-up the Bore for the Reamer to Follow. 'What Starts Straight, Ends Straight'!
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