Drill Bits

Bruz

Bruz

Joined
Mar 9, 2003
Messages
773
Where do you all buy your drill bits? Started working with Titanium and think I need to buy in bulk!
 
2 pices of advice first Get Cobalt drill bit's

Second learn how to sharpen brill bit's . use cutting fluid !

im not trying to be "Smart " just giving friendly advice
 
Use cobalt and coolant. Never let your bit run into the material dry. Frankly, buying quality HSS bits and using a good coolant will give you satisfactory results. If you are using Ti, I'm assuming you are into folders, and with that assumption, I'm assuming you are drilling undersize and reaming to size. Just never let your cutting tools run hot and dry and they'll service you much longer.
 
Do a search on ebay using the specifics you're looking for. I lucked into a grab bag of 96 aircraft grade bits a while back. They were all sizes but you have to mic them to get close to the size you need. They were also step bits so each time you drill a hole it starts with a pilot hole and then steps up to shank size. They don't leave any rough edges on either side of the steel either. They're carbide bits and will drill through hardened 01 tool steel with no problem. Also, get a hand crank post drill and your bits will outlast you if you don't break them. Ask me how I know. :D
 
Thanks all, have been using cheap bits figuring it easier to have sharp "disposable" bits, but they are getting dull so fast it is not working with the hardened steels.

I did get a big bag of "aircraft industry" bits on Ebay but they do not seem to do the job either. I use a drill press and cutting fluid but they seem to either just spin or smoke leading me to believe they are not sharp enough/ getting dull quickly. I do not know how to sharpen them...I think I understand how it is suppose to be done but can not seem to achieve satisfactory results.

Where do you all get your bits? Other than cobalt is there any other "name" for the type and size bits we use for knives?
 
The Drill Doctor works well for sharpening. I use HSS bits, but the carbide are good too. Drill slowly, and I always use Cool Tool II, but most machinists lubricants will work, e.g. tapping fluid. How thick is this titanium?
Just noticed you mentioned hardened steel. This will dull any bit other than carbide very quickly.
 
Yupper! Cool Tool II gets my vote. It seems to clean off well, don't stink, and does a fair job of keeping your bits cool. I think it starts smoking, your bit is too hot and it's time to slow down a little.
 
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