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  #46 (permalink)  
Old 01-06-2008, 08:00 AM
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Quote:
Originally Posted by 79C10
As far as drilling steel and keeping your bits sharp , I will offer some unsolicited advice ( gotta love his site! ) . a lot of pressure , a little bit of speed. keep a small cup of oil nearby for dipping the bit into. Lubes and cools at the same time. If any of your bits were blue on the edges , you were running them too fast.( burning them )
If you already know how to drill steel , I'm not trying to offend you ,just tellin' what I've been taught by folks wiser than I .
No problem with your advice...that's what we're here for. I'm going to play with the drill doctor today sharpening and testing the old bits I've accumlated through the years.

I think speed is an issue too. I have a hard time keeping the speed down with variable speed hand drills. I plan to be much more aware of that too.

Drill Doctor report later

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Old 01-06-2008, 09:56 AM
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The speed thing I control by squeezing and releasing the trigger in a rythym .
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Old 01-06-2008, 10:05 AM
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Quote:
Originally Posted by 1930u
No problem with your advice...that's what we're here for. I'm going to play with the drill doctor today sharpening and testing the old bits I've accumlated through the years.

I think speed is an issue too. I have a hard time keeping the speed down with variable speed hand drills. I plan to be much more aware of that too.

Drill Doctor report later
Go back and reread my post(s) about maybe having to do some playing with settings - it might save a few nasty words for when you really need 'em

Dave
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Old 01-06-2008, 02:23 PM
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As far as drilling goes I use Tap magic or some kind of Oil cutting fluid it works so much better than plain old oil.
& I keep my drill press on the slowest speed.

If your not making curly fries with your drilling your moving too fast

Too fast + friction = Blue & Burnt bits & chips of steel {or what ever your a drillin'}

Also Stainless is another world in drilling & cutting Period.


I need one of them drill doc's





R
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  #50 (permalink)  
Old 01-06-2008, 05:28 PM
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[QUOTE=Rob Keller]As far as drilling goes I use Tap magic [QUOTE]

When is the last time you bought some of that stuff.? We had to quit using it at work because it got so expensive.

Vince
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  #51 (permalink)  
Old 01-07-2008, 06:34 AM
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Quote:
Originally Posted by matt167
Black & Decker stuff is pretty good I think.. but DeWalt is crap... The clutches on 18v DeWalt drill/ drives break often....

Really? I have a DeWalt 3/8 corded drill that I have had for almost 15 years, still going strong. It replaced the B&D 3/8 I had for about 6 months. That thing was horrible. Granted, I don't use my DeWalt every day, but when I use it, it gets the "severe service" use. Only thing I don't really like is using it while wearing my gloves. The motor cooling vents tend to get covered, and then it starts to get warm. Other than that, I'm pleasantly pleased with it.

As far as the bits go, I have a 10 year old set of I believe Craftsman bits up to a half inch that were marketed as "The Point" bits. They have a "split point" and seem to last pretty well, but it's not like they see daily use either. Handy thing for me now is I can take them to work and sharpen them there while on break. We've got a fully equipped grinding room. Heck, I can even sharpen my saw blades (up to 24" if I had one that big...).


In a while, Chet.
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Old 01-07-2008, 07:10 AM
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Originally Posted by schnitz
Really? I have a DeWalt 3/8 corded drill that I have had for almost 15 years, still going strong. It replaced the B&D 3/8 I had for about 6 months. In a while, .
Chet,
Since you bought that 15 year old DeWalt, they were bought by B&D and are their "premium"( ) line. Their manufacturing has been mostly moved off-shore (I can hear Chinese whispers every time I use one my friends several DeWalt 18V drills when I help him build a new playhouse set). As far as drill bits - I just broke a new 'premium' DeWalt Ti coated bit - drilling pine with virtually no load in any direction on it - I seldom break drill bits, ever. I couldn't find a non-Chinese made replacements at either Lowes or HD so I do expect low life on my new pieces.

As far as a battery drill, mine is a 6-7 year old US made 12V Porter-Cable that just keeps on hummmmmmmin .

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Old 01-07-2008, 07:19 PM
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I see, Dave. Until now I never knew that. Makes me wish I didn't know it now......

In a while, Chet.
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Old 01-10-2008, 12:55 AM
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[QUOTE=302 Z28][QUOTE=Rob Keller]As far as drilling goes I use Tap magic
Quote:

When is the last time you bought some of that stuff.? We had to quit using it at work because it got so expensive.

Vince

Last week dude!
I gave my big can to a buddy because he freaked out that I was going to use it on one of his drill bits

He is like MAN!!! What the hell Are you doing?

I m prolonging the life of YOUR bit Providing less stress on everything going on do you have a problem with that?

Yes you are wasting it for nothing .And
what if I need to use it on a tap?

So I brought him mine & bought a new one Quart I believe for Less that $10

& Picked up a few of the Lil baby ones! they are so cute & handy

I use that stuff on everything Rusted bolts,Files ,Drill bits.

I also drill a small hole With my torch tip drill.





R
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Last edited by Rob Keller; 01-11-2008 at 04:40 AM.
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Old 01-10-2008, 07:37 PM
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[QUOTE=302 Z28][QUOTE=Rob Keller]As far as drilling goes I use Tap magic
Quote:

When is the last time you bought some of that stuff.? We had to quit using it at work because it got so expensive.

Vince
I have seen Rob's latest post ... but thought I would add this anyway.
We sell "Rapid Tap" cutting fluid, mfr'd by Relton

When I worked at NAPA, we sold Sulflo

Both products have been reportedly "good stuff" by our customers.
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Old 01-11-2008, 02:03 AM
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The only thing i use on drill bits is just a drop or two of oil. We have small plastic bottles with a bent spout and use Vactra machine oil which is equivelent to 5-30. Just a few drops to keep a bit from gallding. Others will drown the bit in oil, slinging the stuff everywhere. My bits last as long or longer. The key is feeds, speeds, pressure. Hands drill make it tough on a bit because you constantly are changing the pressure angles on the bit, trying to hurry. By changing the angle, one side of the bit gets hotter than the other and back and forth. When the bit gets hot, the metal gets hot. You may get a hard spot in the metal and when that happens the bit gets nicked and is trash. Always us a center drill to start. This will let the flutes of the bit start to cut instead of the point trying to cut. And a smaller bit will cut better than a large bit. So say that you have a 1/2" hole that you have to drill. Drill it first with something like a 3/16" bit, then go back with the larger bit. The larger bit will follow the previous hole and will go thru remarkably quicker and easier.
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Old 01-11-2008, 05:11 AM
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Quote:
Originally Posted by Kevin45
The only thing i use on drill bits is just a drop or two of oil. We have small plastic bottles with a bent spout and use Vactra machine oil which is equivelent to 5-30. Just a few drops to keep a bit from gallding. Others will drown the bit in oil, slinging the stuff everywhere. My bits last as long or longer. The key is feeds, speeds, pressure. Hands drill make it tough on a bit because you constantly are changing the pressure angles on the bit, trying to hurry. By changing the angle, one side of the bit gets hotter than the other and back and forth. When the bit gets hot, the metal gets hot. You may get a hard spot in the metal and when that happens the bit gets nicked and is trash. Always us a center drill to start. This will let the flutes of the bit start to cut instead of the point trying to cut. And a smaller bit will cut better than a large bit. So say that you have a 1/2" hole that you have to drill. Drill it first with something like a 3/16" bit, then go back with the larger bit. The larger bit will follow the previous hole and will go thru remarkably quicker and easier.

Try a cutting fluid & you will feel the difference

Like putting 4 spark plug wires back on your V~8.


If your not making" Curly Fries "your wasting a perfectly good bit.

Motor oil ~Trans Fluid~ W D ~40. All good stuff & better than using nuthin but its NOT a cutting Fluid.

Think about it. . .

Its a Lubricating oil made to keep metal apart what good is that?

http://www.mobil.com/USA-English/Lub...a_Numbered.asp

If the Fluid is slinging off the bit its turning too fast.

I keep my drill press on its slowest speed ...always

Please read This...




R
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Old 01-11-2008, 02:02 PM
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Quote:
If the Fluid is slinging off the bit its turning too fast.
It's not off the bit they are slinging it, it's off the curly fries. Some of those guys at work can go thru a quart of oil a day on 50 holes.

I have used cutting oil. Not too fond of the smell. Just about like PB Blaster. ...great stuff, but the smell is terrible. It's good stuff, but my bits will last just as long as someone that uses cutting oil. I drill cold rolled, hot rolled, titanium, stainless, tool steel, and aluminum. When I buy bits for the departments, I will get Westward bits. Mainly because they are cheap and most don't know how to take care of tools nor care to learn how. So ya get cheap bits and dole them out. I probably have bits in my drill cases that are 20+ years old and never been sharpened. But too, I watch my feeds and speed on what I do. When stuff gets hot, it will break down. As far as WD-40 and drilling, I won't use that. I have seen a fire or two with the WD. One guy was drilling a hardened piece of steel with a dull carbide, the drill was heating up, turned cherry red and at that time he gave it a squirt of WD. Whoosh!!! Funny stuff from where I was standing.
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Old 01-12-2008, 08:10 PM
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Quote:
Kevin 45
As far as WD-40 and drilling, I won't use that. I have seen a fire or two with the WD. One guy was drilling a hardened piece of steel with a dull carbide, the drill was heating up, turned cherry red and at that time he gave it a squirt of WD. Whoosh!!! Funny stuff from where I was standing.

Kewl!!!

Yeas I understand its very hard to Idiot proof stuff.
But on the other hand "Tap Magic actually smells good.

IMHO

You might look into water based Bath recycling units ,

Again it don't smell bad & makes it last longer I was overly impressed @ a employers Recycling units .

1. Was a automatic 8 foot tall

2. Was a 6 head step up press.

{That thing was huge!.
No way a 1 ton dualie would haul the base, never mind the head}.
I tried to find a pix but to no avail

Here is a kool link

3. Was a Home made on a Big Kalamazoo band saw.





R
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  #60 (permalink)  
Old 12-20-2009, 10:49 PM
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Drill Bits

the first reply to this post i think was about all these drill bits from sears ect.. are only good for just one drill, I have to agree completly with this. what the hell how are we supossed to use to drill out broken bolts ect.. i have bought over 100 drill bits each costing 3 to 5 dollars a piece it adds up i would love to spend the money on some bits that will not just go dull after one use but i wouldnt know where to get them i guess ill have to check on these cobalt bits
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