Tip: Close quarters countersinking

[mcencula]

I recently had to countersink some holes in a tight spot and thought the technique might be useful to someone else:

Pick up a piece of thin wall brass tubing from your local hobby shop. The piece I used was 21/32 OD and fit perfectly on my angle drill. About $4.

Cut a piece the right length. This took a few tries to get it just right:



It fits over the countersink bit thusly:



Gets into tight spaces no problem:



Good luck,

[carguy614]

Thanks for posting that tidbit!!

Regards,
Chris

[John Courte]

Very cool! Thanks for the tip!

[777drvr]

What right angle drill are you using ?

Marc

[mcencula]

Mine's a Sioux.

[ProfessorSpeed]

Great idea for a quick solution.
They do make mini csk cages for that very purpose...

http://www.panamericantool.com/
PART # 19-362
1/2 Capacity Mini C'sink Cage
1/4-28" Threaded Shank
3/32" Shaft Travel
1/2" Cutter Capacity
1/4-28 Threaded Shaft
Rated at 3,000 RPM

[Bob Kuykendall]

Originally Posted by mcencula

...Gets into tight spaces no problem:

Just curious, what are you attaching there that demands a countersunk fastener?

Thanks, Bob K.

[mcencula]

Originally Posted by Bob Kuykendall

Just curious, what are you attaching there that demands a countersunk fastener?

Thanks, Bob K.

Angle brackets with nutplates are riveted to all the firewall stiffeners. This allows me to screw on a firewall sub panel, which will trap fireproofing insulation between the sub panel and the firewall.



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