lube on air cylinder threads

pauln · Post by **pauln** » Tue Nov 12, 2013 1:34 pm

In the Pardini manual with regards to refilling the air cylinders it states . ''keep the threaded portion on the connector lubricated with a simple lubricant" So we use a very little of what ? Thanks

opps ment to post in olympic pistol , well it is early here in NZ lol

kameljock · Post by **kameljock** » Tue Nov 12, 2013 2:07 pm

Not sure what they recommend, but I used a synthetic light grease that I use on my mountain bike. I think the brand was Pedro's. not that it matters, and a very small amount. Almost to the point I wasn't sure that there was any applied. It definitely reduced the effort required to hand screw the cylinder on.

This was on my FWB700.

David Levene · Post by **David Levene** » Tue Nov 12, 2013 2:34 pm

I use a tiny amount of Break Free.

DO NOT use silicon grease.

FredB · Post by **FredB** » Tue Nov 12, 2013 5:10 pm

David Levene wrote: DO NOT use silicon grease.

Why?

rmca · Post by **rmca** » Tue Nov 12, 2013 5:50 pm

FredB wrote:
David Levene wrote: DO NOT use silicon grease.
Why?

It destroys the rubber o-ring.

j-team · Post by **j-team** » Tue Nov 12, 2013 6:32 pm

rmca wrote:
FredB wrote:
David Levene wrote: DO NOT use silicon grease.
Why?
It destroys the rubber o-ring.

Errr... Isn't silicon grease exactly what you should use on O rings?

http://en.wikipedia.org/wiki/Silicone_grease

David Levene · Post by **David Levene** » Tue Nov 12, 2013 6:48 pm

FredB wrote:
David Levene wrote: DO NOT use silicon grease.
Why?

It can cause cylinders to bind up solid.

The last time this was discussed on TT I think someone used the word "spalling" but I could be wrong.

Gort · Post by **Gort** » Tue Nov 12, 2013 7:55 pm

Silicone grease is exactly what you want for O-rings.
http://www.amazon.com/CORNING-MOLYKOTE- ... B00B2OHYMU
The point is to use a lubricant that will not degrade O-rings, will not diesel under pressure ( causing a secondary detonation ) and lubricates the cylinder threads to prevent "galling".
Gort

Spencer · Post by **Spencer** » Wed Nov 13, 2013 12:06 am

David Levene wrote:
FredB wrote:
David Levene wrote: DO NOT use silicon grease.
Why?
It can cause cylinders to bind up solid.

The last time this was discussed on TT I think someone used the word "spalling" but I could be wrong.

Be warned; some silicone greases are rheopectic.

and, when David mentions 'solid', he means REALLY SOLID!!!

Shooting Kiwi · Post by **Shooting Kiwi** » Wed Nov 13, 2013 2:29 am

Interesting question. I wish manufacturers would give more explicit information. There are many materials in use for O rings. Some will be attacked by petroleum products. I'm not aware of silicone grease being incompatible with any O ring material (please correct me if I'm wrong - this is important!) and I've used the Molycote silicone grease recommended by Gort on all sorts of O rings for years without problem.

What worries me more is aluminium alloy threaded into aluminium alloy. I suppose the cylinder and housing threads are anodised, but aluminium and (some of?) its alloys can gall or cold-weld when threaded together. Anti-sieze compounds, also marketed as 'assembly pastes' containing a high concentration of molybdenum disulphide or graphite will help, but these will be based on petroleum grease, possibly incompatible with the O ring. Molybond GA 50 is available in NZ, over-priced, of course.

I've come across a range of silicone oils containing molybdenum disulphide, marketed as gun lubricants. Sorry, I can't remember the brand: it was in UK, ages ago. Sounds like it could be the answer...

RobinC as Guest · Post by **RobinC as Guest** » Wed Nov 13, 2013 6:30 am

Lupus professional, its been the recomended grease ever since PCP's came out, I think its PTFE based. I've also seen factory techs using it.
I've used it for years and had no issues.

www.lupus-pro.de
Hochstrasse 150
Willich
D - 47877

Not sure how current the details are as my tub is donkeys years old.

Gort · Post by **Gort** » Wed Nov 13, 2013 8:32 am

Steyr recommends "acid free Silicone grease", refer to section 9, page 38 in the manual.
http://www.steyr-sportwaffen.at/media/L ... E_c_en.pdf
Gort

David Levene · Post by **David Levene** » Wed Nov 13, 2013 9:02 am

Gort wrote:Steyr recommends "acid free Silicone grease", refer to section 9, page 38 in the manual.

That's for the O-rings, not the threads (as the original question).

PFribley · Post by **PFribley** » Wed Nov 13, 2013 9:25 am

Why not pellgun oil???

j-team · Post by **j-team** » Wed Nov 13, 2013 2:04 pm

This is interesting. Although silicon grease appears to be suitable for the O rings, it's not suitable for the thread.

Problem is, every time the cylinder is removed the "psshhh" of air that escapes blows any lube that was only on the O ring on to the thread as well.

So, whatever is used really has to be suitable for both the O ring and the thread.

pauln · Post by **pauln** » Wed Nov 13, 2013 2:24 pm

Thanks for replies, looking at both the pistol and fill adaptor the male threads on both have a very light film of a black grease like substance, applied at the factory . There are no visible O rings in either the cylinder, or male connector on the pistol, or fill adaptor
.I think the factory is referring to an anti seize product for the threads rather than O ring lube .
Anyway I must admit with all the PCP's in use i assumed there would be a commonly used process. A very interesting discussion. Thanks again

kevinweiho · Post by **kevinweiho** » Wed Nov 13, 2013 2:59 pm

Anschütz and Feinwerkbau recommends using their "special grease" for threads and o-rings. I also believe it is a PTFE based formula.

I have used MolyKote grease on some of my guns and have noticed that is does affect some of the urethane seals, but not the o-rings.

j-team · Post by **j-team** » Wed Nov 13, 2013 5:17 pm

pauln wrote:There are no visible O rings in either the cylinder, or male connector on the pistol, or fill adaptor

The O ring is in the cylinder, it's small and seals on the smallest diameter part of the adaptor/pistol. One of the best designed pistol/cylinder coupling that I have seen IMHO.

David M · Post by **David M** » Wed Nov 13, 2013 8:36 pm

See http://www.targettalk.org/viewtopic.php?t=39217
re- Galling and Pure silicone dive grease

David Levene · Post by **David Levene** » Thu Nov 14, 2013 3:03 am

In response to the original post you might be interested in Pardini USA's response (from Emil Milev) in this thread.

"You can use a drop of regular motor oil, not much."

Having used silicon grease (from a dive shop) on a Morini, with the resulting extreme difficulty in removing the cylinder after about a month of use, I won't use silicon grease on threads again.

My experience is obviously very different from David M's.

TargetTalk

lube on air cylinder threads

lube on air cylinder threads

lube

why?

Re: why?

Re: why?

Re: why?

Re: why?

PCP Grease

Lube