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.
![](https://i.postimg.cc/3RF5bY7y/IMG-1091.jpg)
At the mill I set up both bushings for milling to half the diameter. Checking with gauge block over the split.
![](https://i.postimg.cc/286RTst6/IMG-1092.jpg)
![](https://i.postimg.cc/brYX7WNm/IMG-1093.jpg)
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.
![](https://i.postimg.cc/nzJfkC8b/IMG-1095.jpg)
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.
![](https://i.postimg.cc/J0TwMxsM/IMG-1096.jpg)
Finished results. Added dowels to each half to keep the inserts from moving.
![](https://i.postimg.cc/d1vgCpdJ/IMG-1100.jpg)
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 ?