Best Carbide
Klot Carbide Drill Bit for Hardened Steel
Klot
Solid carbide is the only material that can drill heat-treated tool steel above 60 HRC
- Solid carbide
- For hardened steel over 60 HRC
- Slow speed drilling
Pros
- Solid carbide is the only material that can drill heat-treated tool steel above 60 HRC
- Cobalt bits will not penetrate this hardness - carbide is required
- Used on broken bolt extraction when the bolt is case-hardened
Cons
- Carbide is brittle - snap if drill wanders or catches
- Requires slow speed and constant cutting fluid - breaks easily without proper technique
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