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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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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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rv9jim(at)Juno.com
Guest

Posted: Fri Mar 30, 2012 6:16 pm Post subject: Drill speed choice

Actually I find that a slow to moderate speed with the #40 and #30 drills works best.  Plus, the bits stay sharp longer.  Definitly have several of the #40 and #30 bits.  Four of each will last through the build.  Two of a #20 works nice for the "A-5" rivits.  Plus having one each of the longer 6" or 12" bits of the #30 and #40 are necessary in the tight places.  Having a good battery powered drill with at least one extra battery is necessary.  Air drills use a LOT of air.  But then again, you need a "Harbor Freight" air powered pop rivit setting tool.  You do not want to do the bird by hand squezer.   Getting a spare manual poop rivit tool is necessary just to get the tips.  The flat tips are modified to concave.  This is done using the "Dremel" tool.  Get the conical stone tips and use them to create the concave tips.  That is the cheep way.  The dremel tool with many #60 grit sanding drums is necessary.  Get the simple single speed version.  There are some other tools that are the same function as Dremel. By the way, create a piece of 2 x 4 about 12" long that has holes in the large surface side,  Drill a hole for each drill bit in groups with a good 1-5" between each size.  Keeps you from putting them down and loosing them----.   More things if you want.  I am aproaching the end of my build of the 750.  I have some pic's on the Zenith web site under "Jim Nelson".  There are some highly recomended changes for peace of mind (safety) that I recomend.  Pic's on the mods and others on my own collection of pic's.  IF you want more info, e-mail me at RV9Jim(at)Juno.com (RV9Jim(at)Juno.com)  and I will help you any way I can to build a safe and fun aircraft.



--------

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