Diana Can HW30 main spring fit Diana 240 ?

[Mike CT]

My diana 240 reached 8000 shots(16 tin can) few days ago and I know the mainspring almost reach the end of it service so I want to do mainspring replacement but I cant find any seller sell that part.
So i do some research and got that Hw30 mainspring is .113” wire x 26 coils x 190mm lenght and diana 240 is .106” wire x 29 coils x 200mm L, both of them use 25mm tube
I have no experience cause 240 is my only gun for many year. But look at those numbers, something tell me that 240 spring cant fit hw30 but that hw’s spring can save my 240
I know this forum has lots of pro springers so Im here to get a confirmation
Thanks in advance and have a good night!

 

[Kgphotos]

I cant answer your question but I’d suggest reaching out to this gentleman. I believe that he is even a member here.

Tinbum Tuning – It don't mean a thing if it ain't got a spring!

www.airrifletuning.com

 

[ChuckHunter]

ARH carries this spring!
Looks to be right up your alley

 

[beerthief]

My diana 240 reached 8000 shots(16 tin can) few days ago and I know the mainspring almost reach the end of it service so I want to do mainspring replacement but I cant find any seller sell that part.
So i do some research and got that Hw30 mainspring is .113” wire x 26 coils x 190mm lenght and diana 240 is .106” wire x 29 coils x 200mm L, both of them use 25mm tube
I have no experience cause 240 is my only gun for many year. But look at those numbers, something tell me that 240 spring cant fit hw30 but that hw’s spring can save my 240
I know this forum has lots of pro springers so Im here to get a confirmation
Thanks in advance and have a good night!

what makes you think 8000 is a spring life ? for me that is 4 or 5 weeks .

 

[Mycapt65]

Unless I missed it, the most important dimension is missing in the op. The outside or inside diameter. Either will work when the wire diameter is known.

Length and coil count isn’t that important. Springs can be cut and reclosed. Length changes preload but doesn't necessarily indicate strength.

Comparing OD, wire size and coil count gets you in the ball park. Even then coil pitch/spacing and material can affect strength.

Ideally you need to know all of those dimensions and spring rate to know for sure if springs are interchangeable. Or you could just try it.

BTW I wouldn't worry about a broken spring until it breaks. Some go a long time.

HTH
Ron