Drill bit?

[Poboy kartman]

Ok....I pick up old bed frames from the curb...for free angle iron....and use them for all kinds of stuff....

One BIG problem....they can be hard!!!!!!! I have trashed more drill bits trying to get a hole in one than the angle iron is worth....

So....what is the bad boy that can get the job done????

 

[Desertduler]

Ok....I pick up old bed frames from the curb...for free angle iron....and use them for all kinds of stuff....

One BIG problem....they can be hard!!!!!!! I have trashed more drill bits trying to get a hole in one than the angle iron is worth....

So....what is the bad boy that can get the job done????

Cobalt drills or Titanium Nitride coated drills with Boeing lube or lard and slow drill motor speeds.

 

[mckutzy]

They are a bit better steel, but higher than other carbon steels. They have a bit of hardness/brittleness to it aswell.

 

[Poboy kartman]

Cobalt drills or Titanium Nitride coated drills with Boeing lube or lard and slow drill motor speeds.

Ummmm.....yeah...those titanium coated bits are what I just went through a bunch of.....

 

[Poboy kartman]

They are a bit better steel, but higher than other carbon steels. They have a bit of hardness/brittleness to it aswell.

What????? Cobalt, titanium coated, bed rails , or used beds????

What R U talking about?

And....yeah....I'm looking for the hardest drill bit....I did have a couple of thoughts tho.....I guess I could make holes with a dremel....also...another thought occurred to me.....wonder if hitting the area where I wanted to drill with a pencil torch and letting it cool down slowly would change the temper and let me drill....

BTW: Don't get me started on stainless!!!!!!

 

[mckutzy]

Oh ya... Does sound confusing....

The bed rails that is.

Could also go carbide bits...

 

[crazykart]

Cobalt, slow speed and lots of lube. I've drilled through some 1" thick tool steel with cobalt bits. As long as you keep it as slow as you can, and lubed you're good to go. You go fast or forget the lube you've just burned up a bit.

 

[J_Walker]

http://shop.blairequipment.com/SearchResults.asp?Cat=2

Life time warranty. One breaks or gets super damaged. send it back and they send you another.

this has been my little "under the rug" trick for awhile, but I think its time to share. because sharing is caring.

 

[Desertduler]

Were the TiN coated drills that you were using made in China? I use then all the time in my machine shop and the material I drill with them is harder than bed rails but they are not Chinese made.

 

[machinist@large]

Ummmm.....yeah...those titanium coated bits are what I just went through a bunch of.....

Were the TiN coated drills that you were using made in China? I use then all the time in my machine shop and the material I drill with them is harder than bed rails but they are not Chinese made.

D is correct; true industrial grade TiN cobalt drill bits are tough. The majority of the Chinese junk just has a flash coating for looks. Here's another thing to remember; once you wear through the coating, tool life drop's dramatically, I.e.when you get to the point where you need to sharpen the drill, you're only going to get maybe half that use before your next sharpening..

The reason is that the coating is there to help keep the chips formed from sticking/bonding onto the tool. Once that's gone, it just becomes a regular drill bit. Sorry.

 

[Joe-405]

I use those cheap step bits from harbor freight. On sale they are like $10-15 for 3 usually. And if they break well i just get more ! But fyi i usually snap the shank off before the bit goes bad.

 

[ML-TOYS]

What size hole are you drilling?

 

[machinist@large]

What size hole are you drilling?

Knowing Doug, are you really sure you want that particular answer????

 

[Joe-405]

Bwahahahahaha................. keyboard cleanup on my aisle please !

 

[chancer]

I want to know why bed rails are tempered??? and Just to add to the story of drill bits and hard steel.... This past weekend I picked up some 1x angle I had laying around and started making a jackshaft mount. As I was drilling the holes (had predrilled no problem with a smaller bit) I noticed it was not drilling, got another bit (assuming I had picked a dull one) and It was not working either. I had it in the drill press and figured what the he l l So I just kept going. Then the drill bit started glowing red and proceeded to melt down. Later I realized this was STAINLESS angle. Good stuff too, my super strong magnets would not even stick to it.

Oh yeah and Guys please remember Doug is way too cheap to buy any of the aformentioned drill bits

 

[OzFab]

I read something here some time ago about masonary bits; they drill through bricks so...

Oh, BTW: This is in the wrong section, it should be in the tools section... moved...

 

[Poboy kartman]

I read something here some time ago about masonary bits; they drill through bricks so...

Oh, BTW: This is in the wrong section, it should be in the tools section... moved...

Shouldn't all my threads be here???? They're all started by a tool.....

Ummm...yeah maybe 1/4" holes....?and yes Chinese crap....and yes...I've had some pretty good luck with HF "Uni-bits" or step drills...as well....twist drills....not bad either really, but....yeah....once that little bit of coating is gone....they turn your finger green....

And....when it comes to tools....I'll pony up a couple of extra bucks for something that works....

Thanks to all the knowledgeable folks who answered......(and you too, Pat)....

 

[OzFab]

Shouldn't all my threads be here???? They're all started by a tool.....

If that were the case, I can think of quite a few who should only post here...

Regardless of who posts the question, it's about the subject matter... :toetap05:

 

[chancer]

I just had to click thanks to poboy here in post 5. Just to make it an even 1000 Thanks to Doug

 

[landuse]

I read something here some time ago about masonary bits; they drill through bricks so...

Oh, BTW: This is in the wrong section, it should be in the tools section... moved...

I can vouch for this. I also read this nugget of information on the forum, and i can tell you that they work like a charm drilling steel. Go figure....