Keyway cutting tool - video

Keyway cutting tool. By Bart Harkema Metalwork. 19:29 video:

https://www.youtube.com/watch?v=GLQqBUCO0gI

I can/t comment on Youtube but the easy out for the lift problem is turn the bar 180 degrees and cut up. Swarfe drops away and the pressure downwards keeps a constant load on the cutter giving a smooth cut. Lube with a squirt of fluid every now and then.