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  #1  
Old 11-18-2014, 01:54 PM
Av8torTom's Avatar
Av8torTom Av8torTom is offline
 
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Location: Yardley, PA
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Default Help drilling hole

Hey all,

Well, I have my 9A center section all assembled and I realized I forgot to enlarge the tooling holes in the ribs to 5/8" (bottom rib in illustration below). Too tight to get a regular drill in there now. I have a 90deg angle drill but it takes threaded bits. Does anyone know where/if I can get a 5/8" threaded bit? Also a 5/8 chassis knockout punch would work but I can't find one that small. Any other thoughts?

Thanks,

Tom

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  #2  
Old 11-18-2014, 02:17 PM
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Mike S Mike S is offline
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Location: Dayton Airpark, NV A34
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Default Maybe one of these??

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VAF 909

Rv-10, N210LM.

Flying as of 12/4/2010

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  #3  
Old 11-18-2014, 02:26 PM
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Default Threaded bit

My set has a threaded check that screws into the right angle adapter. Unfortunately it won't hold a step drill bit but I'll bet you could buy a HF step drill and grind down the shank till it fit in one. Just an idea. YMMV.
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  #4  
Old 11-18-2014, 02:30 PM
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Default Weld ?

A friend welded the step drill on to a threaded portion for the 90degree drill. Comes in handy later for conduit also.
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  #5  
Old 11-18-2014, 02:36 PM
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Default

I've had to do the same thing and used a cordless 90 degree drill that has a chuck.
I borrowed a stubby step drill someone in a nearby hangar. similar to this:

http://www.ultradenttools.com/media/...b/a/1/a15c.jpg
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  #6  
Old 11-18-2014, 02:39 PM
krw5927 krw5927 is offline
 
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Default

Step drills, very similar to the ones Mike posted above, are available pretty cheaply at Harbor Freight. They have 1/4" hex shanks.

http://www.harborfreight.com/3-piece...lls-91616.html

Also pick one of these up from your local Lowes:

http://www.lowes.com/pd_143440-54602...ductId=3654042

I used this setup a lot in my build.
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Last edited by krw5927 : 11-18-2014 at 02:42 PM.
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  #7  
Old 11-18-2014, 02:46 PM
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Default need a threaded bit

Thanks all - a stubby unibit would be great, but I need it to have a threaded end to attach to the drill since it doesn't have a chuck.

Keep the ideas coming...
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RV-9A (empennage completed, both wings completed, fuselage and finish kit completed, engine hung, working on panel and wiring)
N677AT reserved
Superior XP O-320, 160HP
Picture log: http://s271.photobucket.com/albums/j...8tor215/RV-9A/
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  #8  
Old 11-18-2014, 02:48 PM
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Av8torTom Av8torTom is offline
 
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Default

Quote:
Originally Posted by krw5927 View Post
Step drills, very similar to the ones Mike posted above, are available pretty cheaply at Harbor Freight. They have 1/4" hex shanks.

http://www.harborfreight.com/3-piece...lls-91616.html

Also pick one of these up from your local Lowes:

http://www.lowes.com/pd_143440-54602...ductId=3654042

I used this setup a lot in my build.
Kurt, what sort of chuck does that Lowes drill have? Looks like it also takes threaded bits
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RV-9A (empennage completed, both wings completed, fuselage and finish kit completed, engine hung, working on panel and wiring)
N677AT reserved
Superior XP O-320, 160HP
Picture log: http://s271.photobucket.com/albums/j...8tor215/RV-9A/
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  #9  
Old 11-18-2014, 02:49 PM
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Default

I picked up one of these at either Lowe's or Home Depot. Works great.

http://www.ebay.com/itm/Milwaukee-48...-/221579552951
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  #10  
Old 11-18-2014, 02:52 PM
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Default

Quote:
Originally Posted by ccsmith51 View Post
I picked up one of these at either Lowe's or Home Depot. Works great.

http://www.ebay.com/itm/Milwaukee-48...-/221579552951
Chris, is that just a hex insert?
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RV-9A (empennage completed, both wings completed, fuselage and finish kit completed, engine hung, working on panel and wiring)
N677AT reserved
Superior XP O-320, 160HP
Picture log: http://s271.photobucket.com/albums/j...8tor215/RV-9A/
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