I am afraid to just screw right into it, because I'm pretty sure it will crack. If I use a pilot drill it, will that be enough to keep it from cracking. Or could I drill and tap it. And then just screw it together that way. Will the threads be strong enough to hold it in. If this will not work. What are my options for joining them.
The joints will be butt joints not angled. And they will be holding water. And maybe ethylene glycol (antifreeze) in a 50-25 percent mix with water. But I'm not sure if Lexan is rated to hold this chemical.
2007-09-18 11:08:27 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
I was looking around and found a chemical called IPS Weld-On #4. It is a solvent adhesive. Do you think this would be sufficient. It sounds like the strongest way to bond them. It will only be holding around 100 Cubic inches of water. Not much.
2007-09-18 11:30:16 · update #1
Chemically bonding the Lexan will produce the strongest joint, and I would recommend that over other methods.
As to screwing it up. Highly recommend drilling then tapping the holes. Lexan is very strong, but can be brittle.
2007-09-18 12:07:46 · answer #1 · answered by cbmttek 5 · 1⤊ 0⤋
Butt joints are the weakest of joints. Isn't there another way to do this?
If the pressures are low enough for the butt joints to be effective, then drilling and tapping should be sufficiently strong. The strength of a screw fastener is not only a function of the thread but also of the engagement length. So a deeper hole will give you more strength.
The Lexan will almost certainly crack if you simply try to screw into it. You might get away with not tapping the holes, but it would depend on material thickness, thread pitch, etc.
2007-09-18 18:19:09 · answer #2 · answered by dogsafire 7 · 0⤊ 0⤋