Hi:
I tried a titanium plated bit today. I had to drill out a bolt. Probably grade 5 or 8. It didn't go anywhere and pressure just snapped it.
I took a Black and decker power point to the bolt and it cut pretty well. Not sure what material those are made of.
I needed a bigger drill bit and didn't want to waste any more titanium bits so I went to ACE in search of some tungsten carbide bits, The only thing I could find was Cobalt. Expensive, but they did the job.
Are these Cobalt bits really this:
*** Cemented carbide, or hardmetal as it is often called, is a material made by "cementing" very hard tungsten monocarbide (WC) grains in a binder matrix of tough cobalt metal by liquid phase sintering.***
??
but I also found this:
***The presence of finely distributed WC enables the production of tools with higher hardness and greater wear resistance than with cobalt only.
***The package doesn't give any info other than Cobalt.
I need a quick rundown of how Titanium, Tungster Carbide, Cobalt, etc. bits compare and when to pick what. Seems like the Titanium plating wears off those things quickly.
Thanks in Advance, Mike