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General Discussion To Gateway To Airguns => China Gate => : Graham August 18, 2009, 12:21:46 AM

: B36-2 JM Spring.
: Graham August 18, 2009, 12:21:46 AM

Hi guys, anyone know what JM spring is good for the B36-2???

: RE: B36-2 JM Spring.
: steveiep August 18, 2009, 07:06:48 AM

I think you're referring to what these chaps may know as a Tech Force 99.
I would like to know the answer too, for when my Titan XS spring wears out...eventually.
See you on the UK/Chinese forum. LOL

: Re: B36-2 JM Spring.
: Gene_SC August 18, 2009, 10:09:23 AM

If I knew the deminsions of that spring I may be able to help. Like the coil wire size, length, I/D, O/D.

I do not work on that model so have never seen the sprig. Also I bet Compasseco would have replacement springs available but of course they will be Chines made..

Gene

: RE: B36-2 JM Spring.
: Plinkmaster August 18, 2009, 11:30:10 AM

Hi Guys, If your talking about the Industry brand QB36-2, also the Tech Force 99, same rifle.  The E9870 from Jim Maccari fits and works very well.The spring guide is .475"  and the inside diam. of the spring is .480"  I rounded off the square edges on the end of the spring guide, so they don't catch when You cock the gun. Just put 2 polished and moly greased washers on the bottom of the guide to reduce the spring tourqe, it's only about 1/8 " of spacer.and some grease on the guide. Even though this spring is a couple of inches shorter than the stock spring. I did not add any spacers, did not want to stress the stock plastic spring guide. It is definately a more robust spring. I could tell by the force I had to exert on my spring compressor. I did penetration tests into a phone book, to compare with my RWS 48 and my Industry B-3 and I figure It's shooting a .22 cal. around 700 f.p.s.  all my rifles are .22

: Re: B36-2 JM Spring.
: Graham August 18, 2009, 05:58:07 PM

Thanks a lot lot Plinkmaster, just what we needed to know. I think we'll have to tameit down a little though for UK use. lol.