![]() ![]() I bought a variable speed (750rpm is the slowest setting which I know is a bit too fast for metal drilling but anyway.) drill press and have been using titanium coated drill bits like this to drill into 3/16" or 1/4" steel. I'm just posting my experience as a very junior home hobbyist who is starting metal work I think it is best to buy the fancy bits, only what you need when you need it, if buying it new. It is good to have on hand a few Carbide bits for hardstuff. Industrial quality HSS is good enough for 99% of home shop projects. ![]() ![]() But the home shop rarely cuts exotic metals. The cobalt will hold an edge longer under production demands or hard cutting materials. The cost of the bit is minor compared to no product flowing.Īt least with HSS and Cobalt, they are resharpenable in the home shop. When time is money, a cutter not making efficient chips with an extended life as possible. Coated HSS is again a short lived bonus.Īs had been mentioned. Carbon drills are much harder than HSS and will also chip easier when drilling under high pressure or impact. It is so thin, it may as well not be there, but for a sales gimmic. I have looked over some of the import TiN coated carbon bits. Carbide drills are no peach to grind either, unless you have a diamond wheel. Coated drills cannot be readily sharpened with removing the thin layer, but if it does need sharpened, it must have already chipped. I'd imagine they would be lite, but not good for drilling much but soft materials?īoth carbide and TiN coated HSS will be very brittle. I have never seen a solid titanium drill bit. ![]()
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