RazMan
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| posted on 8/8/06 at 10:28 PM |
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Lowering Gas Strut Pressure?
I want to use some gas struts / dampers to control the movement of my middy's rear section - the sort of thing you find on most hatch backs and
boot lids.
The trouble is that they all have very strong pressure rate and will distort the bodywork.
I need to lower the pressure and let some gas out - is it possible?
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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mookaloid
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| posted on 8/8/06 at 11:08 PM |
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can't see how  maybe there are some designed for other applications other than for cars which may be more suitable? - struggling to think of
any though
how about a spring system? most cars used to use a lever and spring system for the boot lids - a trip to the scrappies to have a look at some?
Cheers
MArk
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mookaloid
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| posted on 8/8/06 at 11:11 PM |
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here you go
http://www.sgs-engineering.com/gas-struts/
google
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907
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| posted on 8/8/06 at 11:15 PM |
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I've fitted them to stuff at work and they have a tiny Allen bleed screw at one end.
I think we get them from RS.
Some of the car ones are pre set and don't have this screw.
If you find adjustable ones only let a small amount out at a time.
hth
Paul G
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mookaloid
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| posted on 8/8/06 at 11:16 PM |
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or this
http://www.gasstrutengineering.co.uk/index.php?page=products&pid=8
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zetec7
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| posted on 9/8/06 at 02:32 AM |
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I don't think I'd try reducing the gas pressure - some of them have a LOT of pressure in them - a grave (sic) safety risk!! The
best thing to do would be to put a piece of alloy to spread the load over a larger surface area, or get special ones with low pressure to start
with...
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Gunner1
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| posted on 9/8/06 at 04:46 AM |
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I agree, rathar than a strut, what about a simple bellcrank and spring, or even a wound spring on a rod, or torsion rod and a catch to hold the rear
hatch down.
lighter, simpler.....
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Gunner1
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| posted on 9/8/06 at 04:46 AM |
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I agree, rathar than a strut, what about a simple bellcrank and spring, or even a wound spring on a rod, or torsion rod and a catch to hold the rear
hatch down.
lighter, simpler.....
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RazMan
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| posted on 9/8/06 at 07:28 AM |
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Thanks for the links - I already had a look at their prices so decided to find a Locost solution!
Spreading the load is a valid point but I still need a weaker pressure as the ones I have are so powerful they are scary!
I will have a look at my local scappy and see if he has anything with a weaker pressure - even a totally knackered pair with next to no pressure would
be ok as I really only need them as a movement limiter rather than a 'lift assister'. A mechanical version like the sliding bonnet stays
would be ok ...
but the gas struts are so compact I will persist for a while.
I was thinking about trying to slide a pin down the seal to allow some gas to escape but I agree that it could be a bit risky! 
[Edited on 9-8-06 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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Nick Skidmore
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| posted on 9/8/06 at 08:14 AM |
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Albert Jaggers in Walsall, W.Mids sell them really cheap and you can specify open / close lengths and ram force in Newtons so if you do a bit of maths
you can tell them what you want.
I thought that type of strut was a fortune until I spoke to them, the ones I wanted were about £7!!
They are a trade only place but if you go to the counter with a made up name they never ask any questions.
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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RazMan
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| posted on 9/8/06 at 08:30 AM |
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LOL - Just did a Google search for them and discovered that Noddy Holder used to work there!
Thanks Nick - I will give them a try.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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RazMan
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| posted on 9/8/06 at 02:16 PM |
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Top company is Jaggers!  - £13 each and with a low pressure of 50 Newtons which should be ideal! £8 carriage but at least I don't
have to go North of Watford (can't find my passport anyway)
Sorted
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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