Author Topic: diana series 70 model 78 breech seal  (Read 1272 times)

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Offline rabbit sniper

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diana series 70 model 78 breech seal
« on: May 08, 2015, 02:58:32 PM »
As above guys can anyone help me out here please  :)
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Online Gambo

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Re: diana series 70 model 78 breech seal
« Reply #1 on: May 08, 2015, 03:24:26 PM »
Have you tried TW Chambers?

Do you have a description and dimensions, or better still, a pic of the seal Rab?

Offline rabbit sniper

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Re: diana series 70 model 78 breech seal
« Reply #2 on: May 08, 2015, 04:00:08 PM »
The seal was a leather one mate but corroded like dry cow muck.
I tried chambers but don't want to pay the same price for postage as the seal costs. It's a restoration project of such for my mates 60th birthday. Il get dimensions when I find my vernier  ;)
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Offline willow

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Re: diana series 70 model 78 breech seal
« Reply #3 on: May 09, 2015, 10:01:09 AM »
The seal was a leather one mate but corroded like dry cow muck.
I tried chambers but don't want to pay the same price for postage as the seal costs. It's a restoration project of such for my mates 60th birthday. Il get dimensions when I find my vernier  ;)
dont want to pay the same price ;D ;D ;D ;D....that a yorky thing
You can't do  anything on a vespa....except constantly work on it!!...hey gambo I've just noticed..HAVE YOU BEEN PLAYING SiLLY BUGGERS

Online Gambo

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Re: diana series 70 model 78 breech seal
« Reply #4 on: May 09, 2015, 10:25:11 AM »
Errrr, normally I'd agree....but Rab is a Lankie, not a *orkie. ;)



I've made breech seals in the past (for a Webley Falcon when I was about 13) from an old leather belt, and a pair of technical drawing compass/calipers.

I marked out the dimensions on the belt, and then scribed round and round and round with points fitted in both ends of the compass to make the internal hole, and then used a craft blade to cut the outer dimension. It worked a treat...and that rifle went on to claim thousands of head of vermin over the next few years.

I also made a piston seal for a Tornado in much the same way, but as I didn't have a suitable new rivet to secure the seal to the piston, I used a 13mm nut and bolt instead.

It worked.......but now that I'm a lot older and a little bit wiser, I realise the lost compressable volume in front of the piston must have been huge (as the head of the bolt stopped the piston going all the way to the end of the cylinder), and gives me an answer as to why that rifle was never very powerful or nice to shoot. :-[

Offline Baggawind

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Re: diana series 70 model 78 breech seal
« Reply #5 on: May 09, 2015, 12:57:17 PM »
What about trying some hole punches. I bought a cheap set that range from 1/8 inch to 5/8 inch. http://www.ebay.co.uk/itm/12-PCE-HOLLOW-PUNCH-SET-TOOL-LEATHER-PAPER-PLASTIC-WOOD-HOLE-PUNCH-/170905131527?pt=LH_DefaultDomain_3&hash=item27cabd5a07 . There are plenty like this on E-bay.

Online Gambo

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Re: diana series 70 model 78 breech seal
« Reply #6 on: May 09, 2015, 02:27:40 PM »
Yes, I reckon they could work...but I didn't have any back when I was 13, so I had to make do and mend however possible.

Another option is if there's a cobbler near you. It's more than likely he'll have a proper leather punch.

Offline rabbit sniper

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Re: diana series 70 model 78 breech seal
« Reply #7 on: May 09, 2015, 02:53:01 PM »
Il get out in the garage reet now and have a gander il report back soon  ;D
Otherwise known as Rabbit Sniffa AKA Cougar Hunter