NAPA carries spring pins, can't you find one with the same shank diameter with a larger head? For what it's worth though, I drilled 2 holes through each of my buggy leafs. I used an $$$ titanium bit, but it cut like butter once it got started.
Instead of a normal spring center pin bolt - go with an allen heab bolt - they are generally a little bit bigger o.d. on the head. If that doesn't work and you still feel the need to drill - pick up a cheap masonary drill bit - put an edge on it with a grinder (nothing special here), use plenty of lube, and get to drilling. Don't try drilling the whole pack at once - go ahead and drill them one at a time.
I ruined 2 HQ regular drill bits trying to do my 1/4 elip packs. After all that, I didn't even get through one leaf! The masonry bit ended up doing the trick after much squeeling and protest. I plan to try and avoid drilling through springs at all cost in the future.
ya....I remember when I used to cuss out leaf packs that would burn up drill bits.....then I figured out the problem.....drill speed needed to be slower.....100 rpm is about right and ya don't get that with a hand drill.
I am sorry to keep repeating this over and over - but it seems so many people with try everything under the sun except for this little suggestion - and all of those other alternatives are generally MUCH more expensive, and hardly ever work as well
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