FAQ confusion - stripping TPC

[C-Mac]

[Reiner]

Do not tighten the nylon set screw while the TPC is in the bolt – you will strip out the TPC threads!

What are the TPC threads made of, that a nylon set screw will strip them?  That strikes me as odd.

Yes, he got the wording wrong.  Most likely you will strip the "head" of the nylon set screw so your hex key won't work anymore if you try to tighen the nylon set screw against the TPC.

You want to insert the nylon set screw into the bolt, with the TPC out, to the bottom of the threads in the bolt and then screw the TPC in, cutting new threads through the very end of the nylon set screw.  This will create enough drag so your TPC will not spin loosely.

[Lothaen]

If you have ruined your nylon set-screw... then will wrapping the TPC threads in nylon tape hold it in place? I see no reason NOT to do this after stripping or losing your nylon setscrew.

Thoughts?

[thkyle]

All the nylon screw (shouldn't even be called a "set screw") is supposed to do, is provide friction against the TPC to keep it in place after you set the spring tension to where you get the right velocity.

You could probably accomplish the same thing with a chunk of a kitchen match stuffed in the hole far enough to rub on the threads of the TPC!

The little nylon screw has caused more confusion to Phantom owners than all the other parts put together!

[B]

It is a tension screw nothing more, it is not meant to be screwed with once the bolt assembly is together.

[Fireball]

I will correct the error.

Thanks for pointing it out!

[panzerr]

but you can mess up your TPC if you don't set your nylon set screw....

On my first phantom (about 11 years ago) I had my TPC unthread itself because I didn't have the nylon set screw tight.  The TPC unthreaded itself, but odly enough still functioned which turned out to be the end of it...the result was my pumping action mashed the threads of the TPC into the threads of the bolt, destroying both!

[thkyle]

You are right that TPC has to be held in place, or it will work it's way out of the bolt and cause big problems.

The problem as I see it, is that people don't understand how the nylon screw works.

With a normal set screw, it can be torqued down to hold something in place. With this nylon screw, that won't work, and it can get ruined when people try to use it in that manner. The nylon screw in the bolt needs to be turned into the bolt BEFORE putting the TPC in there. That is so the threads on the TPC can cut into the nylon screw and produce the drag necessary to hold it in position, yet still be adjustable.

I never had a lot of success with this, probably because I'm an auto triggering fool (or just simply a fool?) so I replaced it with a stainless steel screw so I could crank on it and lock it down good! 

Also not real good for the threads on the TPC, but gets the job done!

Once again, Chefdave will read this about "cranking down and chewing up the threads on the TPC"  and the hairs on the back of his neck will start to rise! Sorry Dave the Phantom whimpered a little from the pain, but it healed up fast......  :

[Reiner]

I never had a lot of success with this, probably because I'm an auto triggering fool (or just simply a fool?) so I replaced it with a stainless steel screw so I could crank on it and lock it down good! 

Also not real good for the threads on the TPC, but gets the job done!

Once again, Chefdave will read this about "cranking down and chewing up the threads on the TPC"  and the hairs on the back of his neck will start to rise! Sorry Dave the Phantom whimpered a little from the pain, but it healed up fast......  :

I admit, I'm with the good chef on this.  I winced a bit too when I read that.