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9/22/2017 12:11:25 AM
Posted: 12/8/2005 6:33:49 PM EDT
i want to buy a set of bits, i have used the cobalt to drill out rivets. but i found a super deal on a nice set of Titanium bits...i have never used the Ti. bits...are they equally as good???

thanks nails
Link Posted: 12/8/2005 6:46:09 PM EDT
No, stay with the cobalt bits.
Link Posted: 12/8/2005 7:01:14 PM EDT
no they arnt as good

but you only need a couple sizes
goto HF and buy a 118 deg drill set they sell 2 diff sets 1 is worthless the other works great

then go drop 7 bucks each and get yourself the best
5/32 and 11/64 you can find
Link Posted: 12/8/2005 7:03:47 PM EDT
I have standard steel bits. I got the 115 piece US made set from MSC and every time that they get a but dull I hit them with the Drill Doctor.

Robert
Link Posted: 12/8/2005 8:37:56 PM EDT
Doing what we are doing, I really don't think it matters. A rivet is not hard to drill. Neither is sheetmetal. Unless I just already have a hard drill chucked up that fits the application it is being used for on a build, I just use a HSS drill. Actually, you could probably use a .20 cent Chinese bit unless you are drilling a hole to be threaded. The problem with the chinese bit is that they vary wildly in diameter. I have measured them and have seen them vary as much as .010 from standard before they ever made a circle.
Link Posted: 12/8/2005 8:50:36 PM EDT

Originally Posted By socandyman:
no they arnt as good

but you only need a couple sizes
goto HF and buy a 118 deg drill set they sell 2 diff sets 1 is worthless the other works great

then go drop 7 bucks each and get yourself the best
5/32 and 11/64 you can find



What are you using the 11/64 bits for?
Link Posted: 12/8/2005 9:14:49 PM EDT
Given your application, it doesn't matter, but quality cobalt bits will outperform similar quality TiN bits in mild steel any day.
Link Posted: 12/9/2005 3:48:12 AM EDT
Cobalt all the way. On my previous vehicle I had to install some aftermarket electronics under the hood and mount them to the body under the hood. titanium bits just spun and did nothing, cobalt ate right thru the sheet metal.
Link Posted: 12/9/2005 4:28:33 AM EDT
I got my cobalt drill bits from Ace hardware and they are Irwin brand and they are guaranteed, just take them back when dull. I did this and no questions asked.
Link Posted: 12/9/2005 8:54:44 AM EDT
The titanium part is just a coating. If the underlying metal is soft, then they are still crap. Cobalt bits are amazing, BUT, they are so good that if you get off center when drilling a rivet in a rear trunnion, they will drill into the trunion material like it is butter and not make a sound. If you use good quality HSS bits, they will try to follow they hole and will usually make a chirping sound to let you know you are hitting on the trunnion. For drilling rivets, I have the best luck with good quality HSS made in USA bits. And Drill Doctor is super.
Link Posted: 12/9/2005 5:11:59 PM EDT
thanks for the reply's... i was at HD today and i did pick up a few COBALT bits to have


Drill Doctor...gonna check into one of those
Link Posted: 12/9/2005 8:57:39 PM EDT
If you do much drilling at all, a Professional model Drill Doctor is a must-have.
Link Posted: 12/13/2005 8:52:43 PM EDT
Cobalts by far. What they said above.

Carbide bits are even better.. i've been using some carbide mill bits lately, cuts 304 strain hard stainless like balsa wood.
Link Posted: 12/14/2005 6:09:32 PM EDT
Carbide is good when the material dictates its use and only in a mill. Carbide bits should never be run in a hand drill because they are brittle and can shatter.
Link Posted: 12/23/2005 6:46:57 PM EDT
What about High speed Steel
Link Posted: 12/24/2005 5:38:29 AM EDT
I use alot of HPS bits in our shop...never had a problem. Nothing is that hard on an AK. It's all in the drill speed and feed rate.
Link Posted: 12/24/2005 6:21:05 AM EDT
typical, this thread was posted after I just bought a load of Ti bits.....at least I have the receipt
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