Hi Rick,
I fully agree that it is much harder than it looks to get multiple screw holes to line up! Learned this even before I found Uncle Dave.
Too many time w/ slipping clamps taught me to go that extra step. If I have more than 2 holes to do, I start just like you did. I drill, tap, clearance/countersink first hole & install screw. Then I drill, tap, clearance/countersink 2nd hole & install screw (on opposite ends if I can). Only after I have 2 screws in tight do I drill the remaining holes all at once. Then tap each & clearance drill & countersink or counter boreeach.
It can be quite tedious, but it works. Nothing worse than drilling 8 screw holes through both parts only to find the top part "walked" off a little more at each hole -- the end hole will line up w/ any other hole -- but just the one hole. The part has to be in a different position for any screw to fit. That'll give you nightmares!!
So yeah, it takes forever, but I do it anyway.
I guess one "hedge" I have used in certain situations is to pilot drill the ends w/ a common size (say 1/8 or 1/4"), then slip in a 2nd & third drill bit (shank first) along w/ the clamps. Still not as good as 2 thght screws.
For what its worth
CT2
--- In gingery_machines@yahoogroups.com, "RG Sparber" <rgsparber@...> wrote:
>
> This is another in my sequence of article for people new to our hobby. I
> deal with the cutting of an angle bracket on a mill/drill. If you are
> interested, please see
>
>
>
> http://rick.sparber.org/mab.pdf
>
>
>
> Your questions and comments are welcome. All of us are smarter than any one
> of us.
>
>
>
> Rick
>
>
>
> [Non-text portions of this message have been removed]
>
http://groups.yahoo.com/group/gingery_machines/app/peoplemap/view/map
No comments:
Post a Comment