They are less brittle then carbide tools but more brittle then HSS and you may break them if you’re not careful enough. Posts: … Usually cobalt bits are no more than 5% cobalt in High Speed Steel. Registered: Aug 17, 1999. Types of Drill Bits and Their Uses ... Cobalt drill bits offer a harder material ideal for drilling into heavier steel or stainless steel items. The downside to cobalt bits is that they tend to cost a bit more than their steel counterparts. Usually cobalt bits are no more than 5% cobalt in High Speed Steel. Cobalt drill bits are great if you drill lots of alloy materials like 4130, and/or stainless steel. But each type has its own peculiar properties.
First, do NOT buy a carbide drill set unless you plan to drill very very hard materials all the time. Ars Tribunus Angusticlavius et Subscriptor. Drill Bits! First, do NOT buy a carbide drill set unless you plan to drill very very hard materials all the time. Materials like Files, and knife blades. Cobalt drill bits are great if you drill lots of alloy materials like 4130, and/or stainless steel. This is a great option for drilling into harder steel as well as stainless steel grades. Using drill press will save you a lot of time, efforts and help you to avoid bit breakage. Materials like Files, and knife blades. Cobalt (HSCO) is considered an upgrade from HSS because it includes 5-8% Cobalt blended into the base material. For example, sharpening titanium bits will grind off their coating, cobalt bits are great for tough steel but are brittle, etc.
HSS vs. Titanium vs. Carbide or Cobalt 9 posts Deffexor. Carbide (Carb) is the hardest and most brittle of the drill bit materials.
Read our short cobalt vs titanium drill bits … It’s used mostly for production drilling where a high-quality tool holder and equipment is used.
Conclusions – Cobalt vs carbide drill bits: Cobalt drill bits are cheaper, and also can be used to drill stainless and hardened steel.
Both cobalt and titanium drill bits are able to work fine for a long time.