The crankshaft, which attaches to the piston and displacer block, is mounted inside bearings to minimize friction. The bearings sit inside the bearing housing which I made with aluminum and shaped on the lathe.
First, I layed out and cut the main shaft using power drive on the lathe (pictured - measuring the depth of the cut):
I added blue layout ink and set my calipers to the correct width. Then, I marked the line around the shaft by rotating the shaft with the calipers pressed on.
I drilled the center hole then cut off the part. The bearing housing was finished.
Then, I created the collar by marking out the width, cutting the center hole, and using a parting tool to cut it off. I used the Allen wrench pictured to hold the collar so it didn’t fly off.
The bearing housing and collar were finished!
