Thread cutting (or forming) fastener for CFR PEEK
Thread cutting (or forming) fastener for CFR PEEK
(OP)
Anybody with experience using a self cutting/tapping thread in carbon fiber reinforced PEEK (450CA30). I called the resin mfg, Victrex, and they were no help - they don't have any technical files for this application. I tried a couple manufacturers of fasteners to join plastics, such as Acument, but they were unresponsive. Also tried Fastenal, but they could not advise me and instead promised me samples to try out (which I never received). Unfortunately technical guides seem to be resin and/or resin manufacturer specific such as this from DuPont or BASF.
I figured I should try here for some tribal knowledge. Based on research, I'm leaning towards self cutting threads, over self forming, as they tend to be for high modulus and/or reinforced thermoplastics. The fasteners will be for permanent assembly. I can't use threaded inserts, molded in or otherwise. I'm open to "special" thread forms like assymetrical threads, etc. to prevent reversal.
Any help/guidance would be appreciated.
I figured I should try here for some tribal knowledge. Based on research, I'm leaning towards self cutting threads, over self forming, as they tend to be for high modulus and/or reinforced thermoplastics. The fasteners will be for permanent assembly. I can't use threaded inserts, molded in or otherwise. I'm open to "special" thread forms like assymetrical threads, etc. to prevent reversal.
Any help/guidance would be appreciated.





RE: Thread cutting (or forming) fastener for CFR PEEK
http
or these for thread cutting:
http://www.acumentnorthamerica.com/duropt.asp
(I assumed you are in North America - if not, Google 'PT Screws')
Cheers
H
www.tynevalleyplastics.co.uk
Why be happy when you can be normal?
RE: Thread cutting (or forming) fastener for CFR PEEK
http://www.reminc.net
RE: Thread cutting (or forming) fastener for CFR PEEK
So for your material with a FM of 2,930,000 psi thread cutting is the proper choice. And yes DuroPT is an excellent choice.
RE: Thread cutting (or forming) fastener for CFR PEEK
RE: Thread cutting (or forming) fastener for CFR PEEK
Heck you can always just order up some "type 25" screws from Mcmaster Carr..
Just want to make sure you know that a pilot hole/boss is required as these are not self drilling screws.