In this video I rebuild a worn down stub shaft on the end of a Sumo trio cultivator packer roller.

Firstly, the collars are removed from the shafts to expose a portion that is unworn. I decide I can use this to make something to centralise my line borer.
I flame cut some 102mm circles on the CNC table from 30mm plate and start making a clamping system to clamp onto the good part of the shaft.
The billets are put into the lathe and machined down to 100mm diameter with a step also machined onto them. I cut off and clean up a short length of tube that fits over the step on the circles and weld them together.
I then drill and reamer one end to 40mm to suit my line boring bar and the other to 60mm to suit the good part of the stub shaft.
Next, I set the part up on the milling machine to mill, drill and tap the bolt holes for the clamping bolt, I use an M10 cap head bolt. After the holes are made, I cut through one side with the grinder to allow it to be pulled together and clamp on the shaft.
I then start setting up the clamp and bar. I decide its too difficult to get an idea if the bar is running parallel with the packer, so I set up bearings on my bench and sit the packer onto them so I can spin the whole thing. Once I’m happy the bar is something like I can slide the bearing set on.
New longer stands needed to be made to mount the bearings on.
When everything is finally mounted, I can start machining the shaft down.
I take 2 cuts off the shaft to start with to give me some depth of weld.
I run welds all the way around the shaft to rebuild it and then machine back to 60mm. I had a few issues with rigidity so this was done with several light passed.
The bearing was a little tight so I had to polish a little bit off with emery tape and sanding wheel.
Thanks for watching.
Hope you enjoyed the video.