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Nitrogen charge safety needle Fox allen key adapter/chuck?

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Rick Draper

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Discussion starter · #1 ·
Hopefully someone here can help me. I have a nitrogen charge safety fill needle on order along with a nitrogen regulator and other assorted parts. I just need to find one of these parts:

I have done a lot of investigation and people seem to use all sorts of things from slotted allen keys to replacing the rubber puck and allen bolt with a schrader valve. I want that adapter!

I guess I can buy the adapter somewhere but I have yet to find where from exactly. If not I guess I will have to get my machine shop to knock me something similar up.
 
#5 ·
MarcusSommers said:
You mean people are using schrader valves to hold back as much as 500psi? So how much gets lost when you disconnect? I think the rubber puck is pretty darn effective.
Click to expand...
What do you think the pressures are in an air shock as it reaches full compression? There is no issue with using a schrader valve for an IFP. For that matter, Rock Shox uses them in their inline air shocks, Manitou used to(and may still) use them as well. A bunch of other manufactures using them in piggyback shocks. Needle designs with rubber pucks work great too, nothing wrong with either set up.
 
#8 ·
mullen119 said:
What do you think the pressures are in an air shock as it reaches full compression? There is no issue with using a schrader valve for an IFP. For that matter, Rock Shox uses them in their inline air shocks, Manitou used to(and may still) use them as well. A bunch of other manufactures using them in piggyback shocks. Needle designs with rubber pucks work great too, nothing wrong with either set up.
Click to expand...
Rock shox uses a schraeder in their monarch plus as well, and the vivid. Not just inline. I just don't think it works as well. Its kind of a hassle to use their tool without losing air. I have a pretty good idea what the pressures inside an air shock can be. I was referring to the act of filling a schraeder to a high pressure, and then removing the fitting. Schraeder doesn't handle this nearly as well.
 
#9 ·
You don't lose air when you fill a RS shock using the tool. You lose the air when you use the tool to check your pressure again. Schraders work just fine, and even if they do leak a bit over the long term, they are super easy to fill.
 
#10 ·
I was under the impression you were able to remove the needle from the rubber pellet, then use a normal allen key to close the valve without losing air, provided you replaced the rubber pellet. Is this not the case?
 
#11 ·
MarcusSommers said:
Rock shox uses a schraeder in their monarch plus as well, and the vivid. Not just inline. I just don't think it works as well. Its kind of a hassle to use their tool without losing air. I have a pretty good idea what the pressures inside an air shock can be. I was referring to the act of filling a schraeder to a high pressure, and then removing the fitting. Schraeder doesn't handle this nearly as well.
Click to expand...
I have never had an issue loosing air. Both methods work fine IMO.
 
#13 ·
Matty F said:
I was under the impression you were able to remove the needle from the rubber pellet, then use a normal allen key to close the valve without losing air, provided you replaced the rubber pellet. Is this not the case?
Click to expand...
Depends on how well the puck seals against the needle. Which depends on how much damage the puck has etc.
 
#14 ·
....what is the best guage or thickness of needle for these applications ? I've 4 x 0.7mm needles and two are already bent, am I tightening the puck too much before inserting the needle ? and can you simple remove the needle and then tighten the puck as some have said or tighten slowly as you gently remove the needle ? Whats the best method ?
 
#15 ·
I don't have it on too tight that the needle can't be inserted into the rubber pellet.
Once I've set the air pressure, I slowly pull out the needle. Right before the needle is removed from the rubber pellet, I tighten while removing the needle. I do this in one step.
 
#17 ·
I use 20g needles (~0.8mm) if its not the Fox safety needle. And yes it shouldn't be so tight you can't insert the needle through the rubber pellet. Fox shocks can be niggly though since they use a harder rubber and thinner puck so being able to nip it up a bit more while the needle is inserted helps.

Most other shocks though you should be able to insert the needle, inflate, remove the needle then tighten it down without losing any pressure
 
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