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Drill speed choice

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raymondj(at)frontiernet.n
Guest

Posted: Fri Mar 30, 2012 1:38 pm Post subject: Drill speed choice

Greetings listers,



I've been lurking for a number of years and am about to order the kit 

for a 750.  I'm trying to decide which drill to buy.  I have always 

heard that faster is better so I'm looking at a 6000 rpm drill. Is there 

a down side to turning the bit that fast?



Thanks in advance for any advice.

-- 

Raymond Julian

Kettle River, MN



"And you know that I could have me a million more friends,

and all I'd have to lose is my point of view." - John Prine

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raymondj(at)frontiernet.n
Guest

Posted: Fri Mar 30, 2012 4:08 pm Post subject: Drill speed choice

I should have done more research before I posted my question.



I found a nice page with some very useful info.  It answered my question 

in nothing flat.  Hope someone else will find it useful.



 > http://www.littlemachineshop.com/Reference/CuttingSpeeds.php#Drilling



The answer to my question is that I can use the 6000 rpm up to a 1/4" 

bit diameter (which is the chuck size) without exceeding the recommend 

sf/m for 6061-t6.

Raymond Julian

Kettle River, MN



"And you know that I could have me a million more friends,

and all I'd have to lose is my point of view." - John Prine



On 03/30/2012 04:38 PM, rayj wrote:

 	  Quote: 	
		   



 Greetings listers,



 I've been lurking for a number of years and am about to order the kit

 for a 750. I'm trying to decide which drill to buy. I have always heard

 that faster is better so I'm looking at a 6000 rpm drill. Is there a

 down side to turning the bit that fast?



 Thanks in advance for any advice.

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pdelano(at)telus.net
Guest

Posted: Sat Mar 31, 2012 9:05 am Post subject: Drill speed choice

Now someone that knows who John Prine is, that's a rarity.



Perry Delano

North Vancouver



--

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craig(at)craigandjean.com
Guest

Posted: Sat Mar 31, 2012 10:47 am Post subject: Drill speed choice

 	  Quote: 	
		   Now someone that knows who John Prine is, that's a rarity.


	


Au contraire, who can forget a man who can rhyme "onomatopoeia" in his

lyrics?



-- Craig

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Geoff Heap

Joined: 12 Jan 2006
Posts: 266
Location: Lindenwold, New Jersey

Posted: Tue Apr 03, 2012 9:19 am Post subject: Re: Drill speed choice

Hi Raymond. It's not that there's a downside to running that fast. There's just no point to it. I've been a machinist all my life (so far) and I'm 62 so picking a sheet metal airplane to build was a no brainer. I've made the whole thing with regular cheap electric corded and cordless drills. Please don’t waste your money. A lot of the time you're going to want to run the drill pretty slow anyway. Like for using reamers. 6000 rpm is for machining aluminum in a CNC mill. To drill at 6000 rpm the drill needs to be moving through the aluminum at 20 to 30 inches per minute. You can't do that. You don’t have the control. A machine does. At that speed it will drill through a .025 sheet in .01 seconds. I’d rather not have anything in my hand that’s turning at 6000 rpm. If you email me I'll give you a shopping list of cheap tools for holemaking that will serve you well. Good  luck……Geoff

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