Well I ordered myself some new valve seat cutters

a70duster said
I get that this is an older post but I believe that my question will be answered here. Does the newer India carbide cutter work with the older Sioux "cutter holder"? I see threads inside the cutter and I'm curious if the threads are the same between the tools.

View attachment 1716165249

View attachment 1716165250

These are pretty much made to be used by hand. A few turns by hand and it’s cut. My mind isn’t made up on these as shortly after I bought a valve and seat machine. About the only one I use is the 70 degree cutter on my speedmaster or Edelbrock exhaust