On Aug 26, 12:59 am, Fortunat1 wrote:
Fred the Red Shirt wrote roups.com:

...

Bits made for wood, high quality brad-point or forstner bits,
may give you a cleaner hole than a twist drill made for metal.
Cheap bits are crap-they'll burn their way through the wood.

Actauly, having tried each on some scrap pieces of spruce, the twist
drill gave the best finished hole and the roundest hole by a long shot.
The 5/16th bolt was a perfect fit after having used a an 8mm twist
drill.

As a rule of thumb, when working wood, use tools made for
woodworking. Duh!

Yes, mostly I do, but in this case, I'll use what works best! I found
the woood bit went a bit eccentric as it went through giving a slightly
tapered bore as it went through.



Was that with a forstner bit or a brad point bit?


So don't get too crazy about making the hole perfect. I think
the epoxy approach is a good idea.

'Kay,. but did the bipes of the thirties have the holes filled in any
way? Lots of them are still flying wth their original spars.


I doubt if they did. OTOH, they didn't HAVE epoxy, else they
would have used it.

--

FF