Does anyone have any tips for how to countersink the flanges of spars, specifically the horizontal stabilizer spars? I’m looking for tips or even pics of a jig or something that (ideally) allows you to run the whole shebang through a drill press. That’s probably a lofty goal, so I'd settle for some kind of clever jig or attachment that helps hold the countersink cage square to the spar flange, and keeps the whole thing from torquing over in your hand and cutting too deep.
Maybe the answer is “just do it” but the problems I’ve had on the stringers (that I DON’T want to repeat on the spares) are that I can’t hold the countersink cage square to the surface I’m cutting, and the single cutting edge bit I’m using bites hard and digs out all the material at once, making it impossible to go slow. It also, as mentioned, twists in my hand and on some of the holes on the stringers ended up going too deep. So now I'm terrified about doing the spars.
Thanks in advance!
—mgm
Maybe the answer is “just do it” but the problems I’ve had on the stringers (that I DON’T want to repeat on the spares) are that I can’t hold the countersink cage square to the surface I’m cutting, and the single cutting edge bit I’m using bites hard and digs out all the material at once, making it impossible to go slow. It also, as mentioned, twists in my hand and on some of the holes on the stringers ended up going too deep. So now I'm terrified about doing the spars.
Thanks in advance!
—mgm