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Sash clamps. |
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J-S 
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Joined: 20 Oct 2014 Location: Auckland Status: Offline Posts: 484 |
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 Topic: Sash clamps.Posted: 06 Nov 2024 at 3:37am |
cheers, worked ok for the oversprung gamo.. though you had to break the barrel to slip it through then straighten it out to compress - wouldnt work with a fixed barrel - youd need to make a removable clamping piece... easier to grab a sash clamp!
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J S Airguns
Air Arms TX200('s) Theoben Sirocco HW77 FWB 300s Webley Patriot One or two others... Current projects: Too many.. |
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jwabfrog
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Joined: 13 Nov 2021 Location: Thames Status: Offline Posts: 159 |
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Posted: 06 Nov 2024 at 2:52am |
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Nice setup JS, barrel poking through the hole is a good way to make a shorter clamp work
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J-S
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Joined: 20 Oct 2014 Location: Auckland Status: Offline Posts: 484 |
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Posted: 06 Nov 2024 at 2:28am |
 G clamp is off to the right.. it was a knock up job, if I had more time I’d make the barrel stop adjustable and a block to clamp the cylinder down |
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J S Airguns
Air Arms TX200('s) Theoben Sirocco HW77 FWB 300s Webley Patriot One or two others... Current projects: Too many.. |
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J-S
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Joined: 20 Oct 2014 Location: Auckland Status: Offline Posts: 484 |
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Posted: 06 Nov 2024 at 2:23am |
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I made a jig up a couple years back; wood base with half a G clamp bolted to it. Wood piece at the end to with a hole to hold the barrel in place and a wood piece along the side for the cylinder. Worked well for the gun I was doing..
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J S Airguns
Air Arms TX200('s) Theoben Sirocco HW77 FWB 300s Webley Patriot One or two others... Current projects: Too many.. |
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RangerPete
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Joined: 19 Apr 2023 Location: Cambridge. Status: Offline Posts: 1023 |
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Posted: 05 Nov 2024 at 3:08am |
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Thanks for the replys guys.
I've also found a 1200mm big metal, screw type sash clamp at miter 10, so I guess thats going to be the one 
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Walk quietly, but carry a big stick.
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jwabfrog
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Joined: 13 Nov 2021 Location: Thames Status: Offline Posts: 159 |
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Posted: 05 Nov 2024 at 2:59am |
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My five cents is go for a longer clamp around 1200mm with a screw. The screw allows you to make fine adjustments to add or remove compression. With a quick release it releases compression all in on go. A compressed spring has a fair amount of pre compression travel which can release violently and fire parts into dark corners of your garage..... 1200mm length will allow you to hold the barrel + action between the clamps.
Like Pauly said, a means of holding the rifle and stopping it from sliding out of the clamp when it's under compression is a good idea.
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Pauly5
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Joined: 11 Mar 2013 Location: Titahi Bay Status: Offline Posts: 1663 |
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Posted: 05 Nov 2024 at 1:41am |
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If there isn't much preload, you can sometimes open up without a clamp. But when I opened up my first 97 it had a long soft spring in it and there was about 80 mm of preload, so I needed the travel on a sash clamp to release the pressure or else I would have injured myself.
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kruzaroad
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Joined: 03 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2619 |
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Posted: 04 Nov 2024 at 2:38pm |
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I use a Irwin quick grip.
Place a bit of wood on it to protect the spring. Takes up most of the slack and has a stopping pin at end of bar. Travels a couple of inches till it hits it. Not that much pressure or travel on an uncocked spring. |
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Pauly5
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Posted: 04 Nov 2024 at 11:46am |
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I use a sash clamp.
Or the DIY one is quite do able. It's a good idea to be able to hold the gun as well so it doesn't slip off to the side.
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nunga
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Joined: 09 Mar 2013 Location: Pukekohe Status: Offline Posts: 1081 |
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Posted: 04 Nov 2024 at 10:37am |
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Well the quick release ones will not be any use to you because the release very quickly. They good for compressing the spring or gas piston. I just used some timber. drill a hole in it and get some m12 threaded bar with some nuts and a couple of washers and you are good to go. way cheaper
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2nd place HP springer - WFTF World Championships 2014
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RangerPete
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Joined: 19 Apr 2023 Location: Cambridge. Status: Offline Posts: 1023 |
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Posted: 04 Nov 2024 at 9:02am |
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Question for those in the know…
What size sash clamp is needed to unspring a springer? Bearing in mind I have break barrels, under levers and side levers, what length sash clamp should I get? I was in mite 10 this morning and the longest that they have is 600mm. 3 options depending on how much clamping force you need, but I’m sure any of them would be powerful enough to hold a spring in. All 600mm length though. Is that long enough for a fixed barrel?  And then there was this bad boy… 1800mm 😳 
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Walk quietly, but carry a big stick.
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jwabfrog wrote: