Follow on instagram:   / snowball_engineering  
Follow on facebook:   / snowballengineering  

In this video I make an external adaptor for my portable line boring machine to allow me to turn a shaft back to round while in situ.
The first job is to profile cut out a block of 30mm steel to use as the billet. The block is then put into the milling machine to have all 4 sides face milled. Next a 38mm hole is drilled and reamed out to 40mm. 2x16mm holes are then drilled through with a slot drill to mark where the edge of the slot needs to be milled, the slot is then milled out. The clamping bolt hole is drilled and tapped then the opening slot is sliced through with the grinder.
Next job is to make the tool post. This is made out of 35mm round bar. An m16 bolt hole is drilled and tapped into the end of the shaft and then a corresponding slot is milled onto the end to match the slot in the block. The 12mm hole for the tool is drilled and also a m8 hole for the grub screw to retain the tool.
Now that’s completed, the line boring bearings are mounted onto the packer roller using the original bolt hole in the middle to align them. The bearings are welded into place and the line borer is mounted on.
The shaft is cut back to remove some of the old weld, it is then built back up with 3 runs of new weld and then machined back down to 50mm

Thanks for watching!
Hope you enjoyed the video.