CBN cut-off/grooving tool?

[Highpower]

Got the shafts finished today. Parted off two lengths of shafting. 1/4" wide groove in one shaft, 1/4" and 5/8" wide grooves in the other, all 3/32" deep. (Full depth of the case hardening.) Went through 8 carbide inserts ($80) to get it done. Sparks, sometimes flames, lots of red hot glowing ribbons of steel turning bright blue and praying they didn't land on ME.

Someone remind me not to do this again....