Finally starting my build

[LelandCrooks]

These are the directions from a guide I wrote for another cab.

Apply a little epoxy to the barrel ONLY of the hurricane nut, DO NOT GET EPOXY ON THE BOLT THREADS!

Holding the hurricane nut, tighten the bolt with the wrench just until the flat part of the hurricane is tight against the baffle. DO NOT OVERTIGHTEN, just pull it snugly.

assembly6_3comp.jpg (10.65 KiB) Viewed 2317 times

Remove the bolt. Repeat for all 8 holes, remixing epoxy as needed. After the glue dries, and before installing the driver, spin a bolt through each nut to make sure the threads are clean. If not, you will need to get a 10-32 tap to run through the nut.

[el_ingeniero]

Thanks, that was fast.

I need to get a few of those brushes. It looks like I should put on more epoxy than I have been.

I got a set of taps to chase out the threads.

[el_ingeniero]

Well, hurricane nuts still suck boulders.

I'm having to apply enough force that my 3/16" allen key got bent.

Even when it's getting in there, as often as not the nut spins with less than 1/16" to go, which means I haven't a prayer of stopping the spin with a pair of pliers.

Not to complain, but this is an area where the standard solution isn't good enough.

[LelandCrooks]

How big a pilot hole did you drill? 1/4" for a #10 nut. You should not be pulling anywhere near hard enough to twist an allen wrench.

[el_ingeniero]

Next question: if you absolutely ruin the hole for the h-nut, what do you do? I'm just lucky I didn't end up having to hacksaw out the bolt.

[el_ingeniero]

How big a pilot hole did you drill? 1/4" for a #10 nut. You should not be pulling anywhere near hard enough to twist an allen wrench.

Well, that explains a lot I was using 3/16" holes. I suppose that's just a tad smaller than it wants to be.

[el_ingeniero]

well, I drilled a 1/4" pilot hole, and the SOB spun on me. Then I couldn't back out the bolt without spinning the nut. So I had to punch the bolt out in the other direction, and use channel locks to get the nut off the bolt.

Miserable.

I guess I'll try hammering the H-nuts into a 1/4" hole with some epoxy to lube thing up.

[LelandCrooks]

Too much muscle. It's a real feel thing. Just pull it flush to the ply, just till the epoxy oozes out. I set them with my drill and the torque clutch set to 5 IIRC.

Are you going in to baltic birch or regular ply? In regular ply the spline type tee nuts work best.

[el_ingeniero]

Going into BB.

The bolt will usually spin well before the H-nut is all the way in.

My first baffle I did with 3/16 holes and minimal amounts of epoxy. My thumb was sore afterwards, so I left it for a while. but they did all go in. But when I chased out the threads with a tab, quite a lot of metal came out.

Maybe I should chase the threads out before mounting the h-nuts.

[jcmbowman]

Yes - use the tap on your h-nuts before mounting them. Then again once the epoxy has set, and generally it's not a bad idea to oil or grease them after you're done with the tap, just to keep rust from being an issue.

And, I use a 7/32" bit to drill my pilot holes.

[LelandCrooks]

And, I use a 7/32" bit to drill my pilot holes.

Doh!

[Drey Chennells]

http://www.parts-express.com/pe/showdet ... r=081-1094
I haven't read the full thread so threaded inserts may have been mentioned already. I haven't had those spin on me..
Coarse thread wood screws with washers through a drop of silicone have worked great for applications with additional baffle thickness..

[DanielNY]

This may seem like an odd tool to use for setting t-nuts or h-nuts, and it was used in a pinch, Turned out to be the best tool for the job. An infant carseat belt clip. It doesnt warp, fits in and around tight spaces, and keeps the bolt head off the wood while setting so it doesnt leave a dent, better than a washer, aaaand you dont have to set it in place before tightenning the bolt. Just hook one of the 4 claw slots around the screw, perfect straight inserts every time. I have'nt had a single nut spin on me.

[jcmbowman]

And, I use a 7/32" bit to drill my pilot holes.

Doh!

Actually, no "Doh!" required, they're specced for a 1/4 hole, I just wanted an extra tight fit since the first time I did hurricane nuts for the T36s I wound up spinning 3 of them on one driver when I went to take it out.

[el_ingeniero]

So, I'm having trouble chasing the threads out on h-nuts: I don't have enough finger power to do it without vise-grips to hold them, but the jaws leave nasty ugly marks on the edges. Any suggestions besides a bench vise (I have one I inherited from my brother, but no place to mount it)?