Author Topic: NEW picts added - Project conclusion (Read 49725 times))

sperho · « **Reply #140 on:** May 04, 2013, 09:08:25 AM »

Quote from: QVTom on May 04, 2013, 02:06:13 AM

Strange, looks fine on my screen. Using Chrome.

Tom

Ditto. Nice linkage...

AmBraCol · « **Reply #141 on:** May 04, 2013, 09:54:51 AM »

I'm not sure why your original post of the linkage didn't come through, but I'm copying it here to see if it'll work for me. I grabbed the IMG tag from the box to the right of the video. Previewing it here shows the video below this text, albeit with quite a gap of empty space between this text and the video. Clicking on the image that shows below takes one to the video in Tom's photobucket album. The link that is working here is one that starts with a URL= right after the [ bracket.

AmBraCol · « **Reply #142 on:** May 04, 2013, 10:12:29 AM »

Okeydoke, I went back, quoted Tom's original linkage video post to see what he had there. I'm attaching a .jpg of the original text together with the one that I used. I still don't know if the one I used is visible to anyone but me, but here's the information just in case. Also attached is an image of the actual photobucket page with a black X next to the code string copied from there to embed the video link here.

PatrickB · « **Reply #143 on:** May 16, 2013, 05:59:06 PM »

Tom,
They gave me the title of machinist at work last year. Thanks for totally destroying that for me. I'm not a machinist anymore after looking at your work, I'm a hack with a piece of metal and a treadle powered lathe. I will have to tell my boss I want to be a mechanic now as I have seen a real machinist (or should I say artist?) at work and I couldn't come that close if the good lord handed me an extra 300 years. LOL. You are tops
Pat

Bryan Heimann · « **Reply #144 on:** May 16, 2013, 08:45:44 PM »

I think Tom is more of an engineer than a machinist at this point. Or maybe a good combination of both. Great work, Tom.

QVTom · « **Reply #145 on:** May 28, 2013, 12:13:09 AM »

Moving forward on the new linkage design. These are some photos of the new rear block ready to receive the lever, linkage and compression tube.

Next is the new( another) Cocking handle.

Tom

QVTom · « **Reply #146 on:** May 31, 2013, 02:17:02 AM »

More cocking system parts.

I tried something different with these links. I wanted a strong and wear resistant material but didn't want to go thru the hassle of trying to harden tool steel or have to send them out and wait so I chose pre-hardened 4142 chrome molly steel. I have some experience with machining P20 mold steel but was a little worried that the 4142 might be a little harder in rockwell and harder on tools. It turns out that the 4142 is a fine steel to machine and the results are great. I used a 100deg. carbide spot drill, hss drill and a carbide reamer to make the cross pin holes. I had to keep the surface speed very low (40sfm)f or the HSS drill, it had no issues drill the 20 or so holes for these parts. The profiles were machined with a 1/8" Hanita Varimill. These are amazing solid carbide tools that have staggered flute geometry to prevent chatter and leave a fantastic surface finish.

Drilled and reamed blanks.

Blanks mounted on quick and dirty fixture.

A full set of links contoured and ready to remove.

The twins

Tom

Motorhead · « **Reply #147 on:** May 31, 2013, 02:23:16 AM »

Very nice and just Like a Soap Opera .... a climax is nearing

QVTom · « **Reply #148 on:** June 01, 2013, 02:53:36 PM »

Very close Scott, just 2 more parts to remake.

Another thought on the pre-hardened chrome molly steel. With a rockwell in the c scale mid 40s it may make a good trigger a sear material. I know most trigger group pars I've worked on aren't any harder than the mid to high 40. The advantage is to avoid the pit falls of home heat treating.

Tom

OleTomCat · « **Reply #149 on:** June 01, 2013, 03:22:48 PM »

Tom,

I really wish you would of had this done for the fun shoot, I would have loved to see it...

QVTom · « **Reply #150 on:** June 01, 2013, 03:38:17 PM »

I did my best but unfortunately there is life and then there are airguns. There is always next year

Tom

lloyd-ss · « **Reply #151 on:** June 03, 2013, 05:25:01 PM »

Hanita varimill, 1/8" dia. Very interesting. There seems to be a lot of positive feedback about them in various places.
Lloyd

QVTom · « **Reply #152 on:** June 05, 2013, 02:48:20 AM »

Wooo Hooo! New cocking links, lever, rear block, bar support and cocking bar installed with both gas spring and charged up to 2500 psi. The action is silky smooth and completely silent when cocking. The previous version had some massive friction and a very springy feel, this one is super solid and completely without flex thanks to some thicker walls, use of 7075 in the handle and the 4142 steel used for the internal levers. Cocking force is about 35-40 lbs (guessing). Its a strange shape to hold with out the stock so I assume that it will feel like less effort when the stock is complete.

Everything is installed except for the barrel, bolt, trigger group and stock. Exactly 4.0 lbs as seen in the pictures. Toss the rest of the parts without the stock and its just under 5 lbs. The goal of a 7 pounder with irons seems feasible at this juncture.

Some more views........

And no I haven't shot it yet so don't ask

Next is to mount the barrel and install the trigger group and then it is ready for the first test as a complete unit.................

Tom

Edit: this project has chewed up some serious time this week! All the assembly and disassembling, chick and egg conundrums......

OleTomCat · « **Reply #153 on:** June 05, 2013, 03:43:13 AM »

Looking good Tom, when does it go into production?

QVTom · « **Reply #154 on:** June 05, 2013, 02:22:58 PM »

Production? LOL Isn't this thread quite the production? Contemporary drama or maybe a saga

I'd have to move 50-100 yearly to even consider producing. And there is still the question of performance.....

Tom

gene_sc · « **Reply #155 on:** June 18, 2013, 06:47:11 PM »

Tom, if the performance turns out as great as what we are seeing n your thread, you may have to produce a batch...

When you are all done and have it all together, your final pictures of the completed shooter may just be the cats meow..

Gene

Hanabata808 · « **Reply #156 on:** June 18, 2013, 07:10:55 PM »

Awesome! Production is in the works... Tom, add me in line for a signed limited number QVTom rifle please!

OleTomCat · « **Reply #157 on:** June 18, 2013, 07:28:16 PM »

hey it was my idea, I get Signed Rifle #2, he of course gets to keep #1....

Hanabata808 · « **Reply #158 on:** June 18, 2013, 07:32:14 PM »

I'm fine with #3 then.

Look whatcha started..

QVTom · « **Reply #159 on:** June 18, 2013, 07:38:10 PM »

@ Larry. I especially like the episode where Homer starts an internet business and he is popping up everywhere, Bill Gate pays him a visit and tells his boys "Buy him out", they then proceed to trash his office.

You are on the list. Its a very short one. LOL

@Gene. We can only hope

Meow............

Got a Big Cat over here today. I couldn't resist the side-by-side comparison. Who da Big Cat now!!!

Tom

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NEW picts added - Project conclusion

Author Topic: NEW picts added - Project conclusion (Read 49725 times))