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  #1  
Old 10-30-2013, 10:16 AM
Dorfie Dorfie is offline
 
Join Date: Aug 2009
Location: Lexington, KY
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Default Perpendicular drilling, free hand

Does anybody have an easy, practical way to drill perpendicular to the surface using hand held drill. I find it especially challenging drilling the door hinges (RV10) from inside! Any slight angle and the screw heads on outside highlights your mistake.
Thanks.
Johan
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  #2  
Old 10-30-2013, 10:22 AM
N15JB N15JB is offline
 
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Location: Denver
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I would just eyeball it best as you can. If you don't like the result, glass it in and try again. Once completed, those screws will only be visible to NBA players.

Jim Berry
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  #3  
Old 10-30-2013, 10:25 AM
Ken Martin Ken Martin is offline
 
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Location: Burleson, TX
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Do you normally centerpunch first before drilling? This helps tremendously and the only other idea I would have is to create a drilling fixture if you feel it's worth the trouble.
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Old 10-30-2013, 10:35 AM
dougmattson dougmattson is offline
 
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Location: Dike Iowa
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Try one of these http://www.aviationpros.com/product/...70-drill-block
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  #5  
Old 10-30-2013, 11:00 AM
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larrynew larrynew is offline
 
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I like to use this. In tight spots I've used the center guide without the plastic housing.

http://www.averytools.com/prodinfo.asp?number=25783

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  #6  
Old 10-30-2013, 11:00 AM
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stinson pilot stinson pilot is offline
 
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Location: North Bend, Wa
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We use these a lot in the industry.

http://www.ebay.com/itm/7-PC-Drill-B...-/141097447572

Edit: Larry beat me to it..
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  #7  
Old 10-30-2013, 11:49 AM
Bavafa Bavafa is offline
 
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Location: Sacramento, CA
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Quote:
Originally Posted by larrynew View Post
I like to use this. In tight spots I've used the center guide without the plastic housing.

http://www.averytools.com/prodinfo.asp?number=25783

Nice!!!!
I think I need to build another plane just so I can use these
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  #8  
Old 10-30-2013, 04:11 PM
BobTurner BobTurner is offline
 
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Location: Livermore, CA
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When drilling into something shiny like aluminum, look at the reflection of the bit and the bit itself - they should be a straight line, not a 'V'. You need to look both from the back and from the side.
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  #9  
Old 10-30-2013, 05:03 PM
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DanH DanH is offline
 
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There is always some way to make a jig.

http://www.kitplanes.com/issues/30_1...s_20873-1.html

Sadly, it is "subscriber only" content...but you can cure that
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  #10  
Old 10-30-2013, 07:56 PM
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Greg Arehart Greg Arehart is offline
 
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What Bob said works, provided the aluminum is not bent or curved.

Greg
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