Author Topic: Disco SSG thread (Read 55622 times))

Dairyboy · « **Reply #240 on:** May 04, 2016, 11:31:32 AM »

His Mrod SSG actually comes with the option now of one with and without a hammer. The SSG Im trying to make is with a Prod hammer. A lot still needs to be done to them to work. First the threads had to be drilled out to 1/4" which wasn't easy as your would think even with hardened bits. And then I had to drill out the spring hole to 3/8" to accomodate a spring to fit on the bolt. Also drilled it a lot deeper than it was at least double what it was. Surprisingly this was a lot easier than the threads which doesn't make sense taking away so much more material. Next coming up a spring length and end cap to work has been a struggle with such little room to work with. I'm sure Travis will have it all taken care of but it definitely takes a lot more time than what it would on a Mrod I'm finding out.

Rivers3Plinker · « **Reply #241 on:** May 11, 2016, 02:25:14 PM »

Quote from: Dairyboy on May 04, 2016, 11:31:32 AM

His Mrod SSG actually comes with the option now of one with and without a hammer. The SSG Im trying to make is with a Prod hammer. A lot still needs to be done to them to work. First the threads had to be drilled out to 1/4" which wasn't easy as your would think even with hardened bits. And then I had to drill out the spring hole to 3/8" to accomodate a spring to fit on the bolt. Also drilled it a lot deeper than it was at least double what it was. Surprisingly this was a lot easier than the threads which doesn't make sense taking away so much more material. Next coming up a spring length and end cap to work has been a struggle with such little room to work with. I'm sure Travis will have it all taken care of but it definitely takes a lot more time than what it would on a Mrod I'm finding out.

More time and more machining of that hardened weight material. That's why I've decided to to just get one from Travis and hopefully he has them made with the Prod hammer relieved for the rear breach screw like Norm was doing.

Buldawg76 · « **Reply #242 on:** May 11, 2016, 02:47:47 PM »

Yep waiting with anticipation myself to see what the end result is and when it available to buy.

Mike

David Mccann · « **Reply #243 on:** May 11, 2016, 06:32:05 PM »

hello here.. ive got my disco apart for oring service. ill try to post pics of the ssg i came up with. ill try to lay it beside a ruler. cheers

Dairyboy · « **Reply #244 on:** May 11, 2016, 06:39:36 PM »

Quote from: David Mccann on May 11, 2016, 06:32:05 PM

hello here.. ive got my disco apart for oring service. ill try to post pics of the ssg i came up with. ill try to lay it beside a ruler. cheers

Lookin forward to it David... Also heard word on another airgun forum that Travis is working on the SSG now but won't be finished until after the Kentucky fun shoot. He said it was looking like it's gonna be very good.

Also the Prod hammer I'm using is one of Norms.

oldpro · « **Reply #245 on:** May 11, 2016, 06:42:39 PM »

Yep I'm getting close guys and I'm also using a modded prod hammer. Will finish up after the GTA but it's looking great so far.

mobilemail · « **Reply #246 on:** May 11, 2016, 06:44:10 PM »

Quote from: oldpro on May 11, 2016, 06:42:39 PM

Yep I'm getting close guys and I'm also using a modded prod hammer. Will finish up after the GTA but it's looking great so far.

David Mccann · « **Reply #247 on:** May 11, 2016, 10:09:10 PM »

here are pics.

Rivers3Plinker · « **Reply #248 on:** May 12, 2016, 10:44:44 AM »

Quote from: oldpro on May 11, 2016, 06:42:39 PM

Yep I'm getting close guys and I'm also using a modded prod hammer. Will finish up after the GTA but it's looking great so far.

Exellent - can't wait.
Thanks Travis

Rivers3Plinker · « **Reply #249 on:** May 12, 2016, 10:47:39 AM »

Quote from: David Mccann on May 11, 2016, 10:09:10 PM

here are pics.

Nice work Dave.
Checking out the rest of your Photobucket pics and those stocks look handmade. If you did those yourself, I'm very impressed!

Buldawg76 · « **Reply #250 on:** May 12, 2016, 08:05:39 PM »

Very nice work David and looks well thought out. one question on the SSG is the spring tension adjuster held from turning by a set screw or is it a nylock nut turned down, or is it tightened down on the bolt so it non adjustable and was played with to get the final tune and then made to that setting with everything being locked as a unit.

Mike

Dairyboy · « **Reply #251 on:** May 12, 2016, 09:22:29 PM »

Thanks David that's exactly what I wanted to know

David Mccann · « **Reply #252 on:** May 12, 2016, 10:18:27 PM »

the nut was layed down and a tapered tip punch placed in the hole of the nut and lightly struck w/ hammer to kinda flatten the first thread a little to keep it from turning freely on the threads. just played with end cap depth / diff lengths rubber vac hose to get the gap. tighter gap seems to give more velocity, while more gap reduced velocity. thank you all for the kind words. the stocks were all done by me, with blk walnut stump and roots we dug out of the dirt, cut up, dried under the stairs for years. much time spent on those. thank you sirs.....and er um maamms. cheers

?

Tater · « **Reply #253 on:** May 13, 2016, 01:12:39 AM »

Great job on that David, it's something to be very proud of!
It's an heirloom now.

Buldawg76 · « **Reply #254 on:** May 13, 2016, 01:20:46 AM »

David
Thanks for the info and those stocks are indeed heirlooms as Tater stated. Excellent work.

Mike

David Mccann · « **Reply #255 on:** May 13, 2016, 04:40:28 PM »

thanks guys

MichaelM · « **Reply #256 on:** May 18, 2016, 01:21:17 AM »

Well I guess its time I posted my SSG setup and build results.....

its a basic "cartridge" type design.... there was no mods to the hammer and only changes was done to the rear cap and it was drilled and tapped to 1/2-20 so that it would completely clear the stock disco springs so that any spring changes or adjustments could be made without taking the gun apart..

the important bits... bout as simple as it gets... guiderod front and rear spring guides stop collar and preload adjustment nut... and then the rear gap set and locking nut...

here it is with everything installed in the gun

uncocked

Cocked

While its not a true "fully internal" setup there is nothing exposed to bite hands.....

and here is the shot string...

And the Efficiency calculations

While I feel the efficiency is extremely good it wastes a LOT of air driving a 14.3 grain pellet to 26.4 FPE... with 18.1 and the same tune it gets 31 fpe and I pick up a few shots at the end of the string for even better eff (think it was in the 1.7fpe/cuin range) but I didn't make a chart of that shot string.... or if I would detune the 18.1's to 26 fpe I would imagine I could get probably another 10-12 shots or more and easily get into the 1.8fpe/cuin efficiency ball park... but that's neither here nor there as I shoot almost exclusively 14.3 cphp because they are cheap and plentiful and the gun shoots them well......

Buldawg76 · « **Reply #257 on:** May 18, 2016, 02:50:00 AM »

MichaelM
I like the design and am curious as to where the free play thumb adjuster and thumb nut are from as that looks very custom and like it was made for the gun. I already have my disco end cap drilled to the 3/8-24 that crosman use in the Prods and Mrods so going out to 1/2-20 would not be much of an issue.

Mike

oldpro · « **Reply #258 on:** May 18, 2016, 02:57:22 AM »

Im going to finish my buddy Marks(mobilemail) this week and would like to know what wire diameters are you having the best luck with?

lloyd-ss · « **Reply #259 on:** May 18, 2016, 08:45:31 AM »

Gotta say that I am impressed with the work done here by everyone: David, Michael, Travis, and all. Good collaboration and sharing of info, along with the excellent results.
Lloyd

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Disco SSG thread

Author Topic: Disco SSG thread (Read 55622 times))