Lightweight cylinder HW 100 carbine recommendation

[Goatofmendez]

i have a@m cylinder and had no probs. atb mick

Lets hope it lasts.

A&M Cylinder Failure

[senor-cojones]

Also had an A+M cylinder on my carbine and it was good, no issues. Only reason I swapped was i had a Ratworks tune and had their cylinder too, which is also good.

[Jonjon79]

I've had A&M cylinders on 2 HW100s now - they've both been good 👍

[Jonjon79]

Lets hope it lasts.

A&M Cylinder Failure

Is that where it's designed to fail if it's over filled?

[Goatofmendez]

Is that where it's designed to fail if it's over filled?

The guy who had it was selling on e#ay and said it was never over filled. Only had it 18 months.

[Goatofmendez]

Also had an A+M cylinder on my carbine and it was good, no issues. Only reason I swapped was i had a Ratworks tune and had their cylinder too, which is also good.

Just watch your fingers and wear safety goggles when filling from now on

Do we know who's cylinder it was yet?

[Jonjon79]

The guy who had it was selling on e#ay and said it was never over filled. Only had it 18 months.

Ok. I know that they have a failsafe built in to prevent them from being over filled but, that's about as far as my technical knowledge goes.

It might be worth showing Ady at A&M the pictures - I've always found him to be really helpful 👍

[Blackmax]

A failsafe? It's much easier to put a destruction valve in rather than loose the whole cylinder.

That's just an excuse for poor quality material that's overstressed.

[Goatofmendez]

Ok. I know that they have a failsafe built in to prevent them from being over filled but, that's about as far as my technical knowledge goes.

It might be worth showing Ady at A&M the pictures - I've always found him to be really helpful 👍

He might be really helpful, but I've seen some of his work on guns and barrels first hand.

[greenwayjames]

When dive cylinders are tested hydrostatically the pressure is 1.5X the SWP. This is only done to check the expansion of the bottle which should be no more than 5%. Expand - not split from end to end. Before going into production they should have been tested to destruction which would be far more than just 1.5X probably at least double that. Splitting open as in the pic is destruction of the cylinder.
That would never happen with a buddy bottle made by a reputable company such as Luxfer. Moral of the story is to beware when buying aftermarket pressure vessels.

[Luftgewehr100]

The actual tube from HW100TUNING is actually only £160 for
a carbine, when you start getting the in tube reg etc it's more money and the one that split is one
of the suppliers you mention.

Look at option 2 on their site and there is £220 which I don't want to spend for just 400g less weight.
Sorry to hear about a cylinder splitting...not funny at all.

I was interested in buying the A&M cylinder offered in the sales section but 4 years old an no valve
fitted so I better add 20 quids and get a brandnew one with warranty...

That's why I asked for Your experiences with the aftermarket cylinders :-)

[Jonjon79]

A failsafe? It's much easier to put a destruction valve in rather than loose the whole cylinder.

That's just an excuse for poor quality material that's overstressed.

He might be really helpful, but I've seen some of his work on guns and barrels first hand.

I can only speak as I find and, I've always been happy with his products and the service received.

[I. J.]

we all know which auction site you refer to, but that needs much more facts to verify the above comments, where bought exactly,an make, an any more info.(even it it is "my mate made it in the shed")

As stated - it was a club member and friend. It was sold 'as new' and tested and certainly not a mate in a shed. The site was e#bay.

The guy who had it was selling on e#ay and said it was never over filled. Only had it 18 months.

The one I mentioned failed at 150 BAR on the FIRST fill.

[Rob2hook]

The pic of a crack across the thread is quite typical of aluminium failure under pressure. The split cylinder looks more like a welded seam having failed - and pressure vessels should be made from seamless tube or machined from solid. Aluminium is a material that is prone to having dislocations in its structure. Eliminating them requires expensive manufacturing methods all of which could be of no value if you then draw it out into a tube, a process which puts the bulk material under severe stress.

Steel handles the whole manufacturing process much better and from what I have read so does titanium.

Musing on this, I can't he;lp but wonder whether the ideal would be a hybrid tube, but that would be prohibitively expensive as pressure welding the inner and outer tubes together would require an explosion within a mould. Many ships and luxury yachts have steel hulls for strength and aluminium superstructure to reduce top hamper (weight). The interface between the two is a bi-metallic strip of steel/ali bonded by explosives. This dramatically reduces corrosion of the aluminium against the steel.

Rob.

[spartan]

Well looking at that picture, it's quite obvious that that cylinder as not been tested, as the law stands any pressure vessel holding less than 500cc, does not require testing, hence that rubbish, proper alloy pressure tube is as expensive as titanium, so i very much doubt at those prices its made from the correct grade tube, probably standard run of the mill seamless alloy tube at a tenner a metre, what some people will do to make a quick buck.

I can assure you that that's not a safety feature, if designed as a safety feature it would bulge at the front where the o ring seals, extruding the o ring and releasing the air, as the air arms range are designed to do if there over pressurised, but looking at that the o ring seals at the rear of the plug, so impossible to have any type of safety feature built in, all in all stick to steel or titanium cylinders.