Break-barrel - torsion (gate) spring anyone?

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Break-barrel - torsion (gate) spring anyone?

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oldfart

Post subject: Break-barrel - torsion (gate) spring anyone?

Posted: Sun Jan 01, 2023 2:11 pm

Joined: Thu Dec 24, 2020 4:07 pm
Posts: 78
Location: Quebec, Canada

Hi, wondering if anyone has ever tried to use available and cheap torsion springs (also known or sold as gate springs) to replace the powerplant in a typical break barrel?

Availability and cost is the main driving factor for this idea as any home improvement center carries them, cheaply and within the dimensions for B18/B19 replacement compression spring.

Has anyone tried it? Any drawbacks other than spring ends modifications and some diligent filing?

Here's what i saw recently (somewhat, forgot about it for a couple months)

Attachment:

File comment: Onward brand 11¾ gate spring

e6cfda4795c1bfa65edb9f2789c4a9fe_600x.jpg [ 100.56 KiB | Viewed 390 times ]

Thanks for any input!

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TCooper

Post subject: Re: Break-barrel - torsion (gate) spring anyone?

Posted: Sun Jan 01, 2023 4:36 pm

Site Moderator

Joined: Sat Sep 03, 2005 9:25 am
Posts: 4598
Location: Ontario, Canada

It sounds like an interesting experiment. The OEM B18 spring is 36 coils of .122" wire with an ID of approx .495". A .118" wire also works well for a mild shooting B18. Last week I chopped and installed a .128" wire spring (from Hatsan) into a friend's B18 and it's shooting very well with good consistency and accuracy.

What's the wire thickness on the gate spring? Years ago, I remember guys using the Princess Auto machine gun springs in various airguns and they seemed to work fine.

An OEM Crosman full-power B18 spring is only around $14. You can get free shipping if you buy a few springs and some seals.

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Dukemeister

Post subject: Re: Break-barrel - torsion (gate) spring anyone?

Posted: Sun Jan 01, 2023 7:17 pm

Joined: Fri Jan 22, 2010 1:17 pm
Posts: 4167
Location: Kingston, ON

I have to say no to this one. The design is not suitable for a spring gun, look how the end coils are touching. As mentioned above, cheap airgun springs are available. I have bought some on aliexpress as well as other places, even our Forum stores, Sniper Dan, Archery fun, Canada Shooting supply etc sell springs for cheap that work well. Of course, spring for a kit and you're going to get better quality. But, a gate spring.. it's an unlikely longshot.

Attachments:

20230101_191044.jpg [ 141.98 KiB | Viewed 364 times ]

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Daryl

Post subject: Re: Break-barrel - torsion (gate) spring anyone?

Posted: Mon Jan 02, 2023 8:12 pm

Joined: Wed Jan 05, 2011 12:35 pm
Posts: 11369
Location: P.G. B.C.

Seems to me, that gate spring is meant to work through a 90 degree bend, rather than a compression/expansion lengthwise stroke.

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