Thread: Drill bits for knife making

I had the job of replacing a number of cutting blades on the river weed cutters down here. A couple of hundred holes through each of the spring steel blades (did 4 with 2 blades each). I used masonry bits that I first sharpened. The key was to avoid heating which caused the weld to melt releasing the tungsten tip. Use a bit of cutting fluid, press down a couple of seconds, lift tip a couple of seconds, repeat over till through being careful as you break through. Managed the last two on one drill bit.

Then came the job of hammering all the rivets.