Machining the bearing insert for the crankshaft center support.
Turned the O.D. of the bushings for a tight fit to the housing with the I.D. rough drilled. I parted off the bushing longer than needed.
At the mill I set up both bushings for milling to half the diameter. Checking with gauge block over the split.
With the inserts installed I finish bored for the crank pin diameter. The reason for this operation was to insure that I was exactly on the center line of the crank measured from the base plate. Everything will be doweled when in final location.
The final length of the insert is mill in relation to the thickness of the bearing support block, equal amount and centered. I left .005" per side clearance to the crank throws.
Finished results. Added dowels to each half to keep the inserts from moving.
Added note : Repeated this operation after I found a piece of 660 bronze stock I did not know I had. IMO 360 brass makes a poor bearing material and was not my first choice. Beside who doesn't like doing things over again ?