N/A Foster Fitting Wear/Damage

[Spartan]

Hmmmmm. So I've noticed this in the past, but recently was the first time it became an actual issue. I could not insert it into the fill line due to the burr that had been raised. Presumably this is caused by the ball detents pushing on the collar when pressure is applied over and over again. They dig into the material and push it back little by little.

The foster fitting in the pic is brass, but I've even noticed the same phenomenon on stainless steel fittings, but to a lesser extent.

Either way, guess I'm done buying brass foster fittings.

 

[Chukar60]

Exactly what causes that. Stainless fittings are a bit more resistant to the wear but still susceptible.

 

[Firewalker]

Thats not normal, way too soft for HPA!!

 

[Nomadic Pirate 66]

Not that extreme but seen that happening on steel ones too,...that is why I prefer by miles Probes.

 

[Steve52]

I only use stainless steel rated to 4500 psi or higher. I hope they never look like that brass one.

 

[cavedweller]

Hmmmmm. So I've noticed this in the past, but recently was the first time it became an actual issue. I could not insert it into the fill line due to the burr that had been raised. Presumably this is caused by the ball detents pushing on the collar when pressure is applied over and over again. They dig into the material and push it back little by little.

The foster fitting in the pic is brass, but I've even noticed the same phenomenon on stainless steel fittings, but to a lesser extent.

Either way, guess I'm done buying brass foster fittings.


View attachment 442760

Why brass when stainless is inexpensive?

 

[Spartan]

Why brass when stainless is inexpensive?

I would guess that manufacturers choose it since it is easier to machine as they pump out those fittings by the truckload. Me, I have never sought out brass fittings over SS, but sometimes it is what is available or it just happens to be what you get. The one in the pic is actually a one-piece fill probe for a Wildcat that I received in a trade. Up until now I wouldn't have hesitated to go with brass if it was cheaper or easier to get, but now it will be SS only from here on out after realizing what was happening and the potential issues it can cause.

 

[PasadenaMike]

This is very informative

So What Is A Foster Fitting? - Hard Air Magazine

The PCP airgun world uses 1/8-Inch NPT quick disconnects. These are often called Foster fittings. But what is a Foster Fitting?

hardairmagazine.com