That looks like it might have been made in China.
Many years ago.
Happy Old Goat
That looks like it might have been made in China.
Many years ago.
Arthur
I wish I was in the land of cotton.
Registered ̶D̶i̶a̶n̶a̶ User
WhyOriginally Posted by Arthur John Smithsplease
Nails Mc Fugger
If the groove in the piston rod is where the original crimp is then the second crimp is likely to make it more unstable
Stupid Idea I reckon !
( hope I don't have to explain )
Registered ̶D̶i̶a̶n̶a̶ User
I wonder if the piston rod is now longer.If the groove in the piston rod is where the original crimp is then the second crimp is likely to make it more unstable
Stupid Idea I reckon !
Even better looking than a HW35
I think it's a pretty bad idea in the first place using a crimps to hold the whole thing together, would the deeper crimps and the new crimps make the piston even more out of round? (yet another problem they've had) surely they should realise that the metal has to go somewhere when it gets compressed and it doesn't always go inwards.If the groove in the piston rod is where the original crimp is then the second crimp is likely to make it more unstable
Stupid Idea I reckon !
( hope I don't have to explain )
Pete
Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
Registered User
I really wish I hadn't seen that Barry.
After turning god knows how many rifles out with iffy pistons, they've now decided they need to crimp them a little harder ??
Looks like someone on work experience has "had a go"
On the list of top ten attempts to bodge a cure, this has pipped HW's 99"cure" by a fair margin.
Certainly put the lid on me owning another Diana.
Last edited by robs5230; 14-01-2018 at 08:50 AM.
B.A.S.C. member
Even better looking than a HW35
My thoughts exactly, I think my 34 may be getting sold soon.I really wish I hadn't seen that Barry.
After turning god knows how many rifles out with iffy pistons, they've now decided they need to crimp them a little harder ??
Looks like someone on work experience has "had a go"
On the list of top ten attempts to bodge a cure, this has pipped HW's 99"cure" by a fair margin.
Certainly put the lid on me owning another Diana.
Pete
Far too many rifles to list now, all mainly British but the odd pesky foreigner has snuck in
Registered User
Yep.
I may offload mine now.
We may have to be quick though
B.A.S.C. member
Registered User
I very much doubt the piston rod is longer. That would mean reworking one of the major parts in this assembly. They clearly have no intention in doing that.
They are mass producing these things to a minimum cost or there would have gone more effort into this than smashing them all together with a load of pressure.
It looks like they have realised that some problems have arisen re loose rods and the odd rod coming out. So the answer is to give it a second smash together.
Not engineering purity ... but if it works it works. They aren't looking to flog Olympic Match accuracy here in these type of rifles. Just mass produced samples that will give most of the world decent enough power from a simple break barrel airgun to pop some tins in the garden or some bushy tails in the trees out to about 40 yards.
Unlike the 'Tune them to the Nth to squeeze another 3% accuracy out of them' brigade on here ... Diana aren't interested in that.
A 2 lb hammer knocks nails in. It doesn't have to be engineered to a tolerance of 0.001". It doesn't have to be Gold plated. You just want it to knock nails in and the head doesn't fly off and kill the bloke behind you. If this extra crushing fixes the safety issue ... it's sorted.
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I've never experienced piston/rod failure on any Diana Ive owned going back to 1986. I have had probably over a dozen Dianas with this method of piston construction and experienced varying degrees of out of roundness, which is annoying enough, but nothing more serious.
I believe that there have been big variations in the hardness of Diana piston etc. steel over quite a number of years. The steel obviously reacts differently to the pressures of crimping. This is how the out of round issue effects some guns much worse than others. And probably why there has instances of rod detachment.
Obviously, there is a happy medium that Diana have found the vast majority of the time. But you can't help thinking they should revert back to their old system or use a new method.
It would probably restore confidence which is critical. Especially at this juncture.
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