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Just to close the loop - I am boring out a LoveJoy coupling and redoing the keyway for a motor up-upgrade on my logsplitter.
I cut the broach down with a zip disc and a hardened piece of scrap as a straight edge - the cut edge was within .012 in of straight. I was happy. Turned a bushing and was about to mill the slot for the broach in the bushing. Endmill looked too small - went back to the 8 hp motor (previous was 5 hp) and measured the keyway - 3/16. The 5 hp had an 1/8th keyway. I already had a 3/16 broach but not the correct dia bushing. Finished off the bushing that I started for the 1/8 broach and broached the 3/16 keyway.
A lot of effort to make a tool I did not need and used a tool I already had.
I cut the broach down with a zip disc and a hardened piece of scrap as a straight edge - the cut edge was within .012 in of straight. I was happy. Turned a bushing and was about to mill the slot for the broach in the bushing. Endmill looked too small - went back to the 8 hp motor (previous was 5 hp) and measured the keyway - 3/16. The 5 hp had an 1/8th keyway. I already had a 3/16 broach but not the correct dia bushing. Finished off the bushing that I started for the 1/8 broach and broached the 3/16 keyway.
A lot of effort to make a tool I did not need and used a tool I already had.
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