3D printed bolt protector

[nightram]

A friend of mine showed me this for his Tikka bolt. The idea is that it "reduces the pressure on the spring" or such while in storage.

I don't know how effective that is, but I have a 3d printer so I decided to make one. Below is the v1 that needs minor adjustment with the v2 being printed as you read this.

When complete I'll upload the stl for anyone to print. Current bolt is a 10FCP.https://uploads.tapatalk-cdn.com/20170409/b2d44b4c1e469fbf5fdebded6c14b8a4.jpghttps://uploads.tapatalk-cdn.com/20170409/a153f79c52c32be5ba320182ac9203c6.jpghttps://uploads.tapatalk-cdn.com/20170409/8c4e4e9eb6b2048856699ce8d3e92f41.jpg

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[SDKMMC]

Very neat, but I will tell you cycling a spring in and out of compression is what wears it out whereas storage in compressed vs uncompressed does not affect the spring.

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[nightram]

I understand. However, there is a market for them and people could print their own instead of buying :)

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[RustyShackle]

I'll second SDKMMC. Not sure why people feel it necessary to "reduce pressure" on a spring.

I could really play around with a 3D printer though.

[RC20]

Old wisdom that springs loose tension if compressed.

Not true but we didn't know it (we were never allowed to leave a dump-truck with a load of dirt overnight

That said we know better now. Still out there.

If you want to un-compress the spring trip the firing mechanism

I don't need a 3 D printer to do that.

[Robinhood]

Nice, There was a guy who posted a bolt sleeve file for a 3d printer a year or two back.

I have seen bad metallurgy cause springs to loose tension before when left loaded. In todays world on engineered products it is almost unheard of unless it is taken past yield.

[RustyShackle]

Making a "bolt body and handle" cleaning (bore) guide would be killer though! Simple and sell good I bet.

Cheers

[J.Baker]

A solution for a non-existent problem.

[Hotolds442]

Looking at your pictures, I'd say you've done nothing to reduce any pressure on the firing pin spring.
Your bolt is still cocked, the spring is still compressed.

[Robinhood]

Looking at your pictures, I'd say you've done nothing to reduce any pressure on the firing pin spring.
Your bolt is still cocked, the spring is still compressed.

Just a little more clockwise rotation and the pin and all fall. I think you are correct though. No need for anything but a 7/16ths" longitudinal slot for the cocking pin.

[nightram]

Looking at your pictures, I'd say you've done nothing to reduce any pressure on the firing pin spring.
Your bolt is still cocked, the spring is still compressed.
Correct, this is the v1, which at this point does not work (as mentioned). The v2 is being printed.

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[nightram]

A solution for a non-existent problem.
Well, that would be personal preference. A quick Google says there is a market for it and I am giving my time to make it nearly free.


http://www.hss.net.au/product_info.php?manufacturers_id=43&products_id=1243

Is an example.

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[nightram]

Ah drat I forgot the locking lug bolt face has to move. No probs, v3 has got this!

Brb in 8 hrs.https://uploads.tapatalk-cdn.com/20170410/dc598dc33814aadd75b671c1081358aa.jpg

[Texas10]

About a year ago someone provided a link to a file for making a bolt protector with a 3D printer. An enterprising member here printed up some and sold them. I bought one, but I also investigated having them made. Unfortunately, there were a couple of problems with the design. First of all it had the words Savage engraved into it, a copyright infringement, but also the hardness of the plastic is a big factor in making it successful. The one I had was destroyed when I put a brand new model 12 bolt in it and tried to remove (you have to cock the bolt to remove) and the cocking pin tore into the plastic. I had to disassemble the bolt to get it out.

But the idea was sound, so I made one out of Oak and plywood, and it works great. Not only keeps my bolt safe when out of the action, but I use it to inspect the bolt head and firing pin in the uncocked condition. That ability came in handy a couple of weeks ago when a primer blanked and the small piece of the primer went up the firing pin hole and jammed the firing pin, keeping it from striking the primer on the next shot.

I inserted the bolt into the protector, uncocked it, and could immediately see that the pin was not protruding from the bolt head. I quickly disassembled it, shook out the primer piece and was back together and shooting in a matter of minutes. No further investigation needed.

I don't compete in shooting, but if i did, that little piece of equipment could have saved the day.

I'll post some pics if anyone's interested.

[RC20]

Looking at your pictures, I'd say you've done nothing to reduce any pressure on the firing pin spring.
Your bolt is still cocked, the spring is still compressed.

It looks to me its both an un-cock and a cocking device.

I can do that on the edge of the bench, I don't do it that often.

Maybe if I was one of those who take the stuff off the bolt head to do a head space check? But I am not..

I am lucky to find my hex wrench on any given day.

[RC20]

A solution for a non-existent problem.

But its a really cool 3D solution! Maybe we could make an App for this? Motorize it, cock and un-cock while on vacation to keep it ready to go?

[J.Baker]

But its a really cool 3D solution! Maybe we could make an App for this? Motorize it, cock and un-cock while on vacation to keep it ready to go?

Here's an almost free solution for a tool to decock and recock the bolt that didn't take hours to draw up on the computer or take several more hours to print out multiple revisions on a 3D printer. In fact, any one with a reasonable amount of grey matter between their ears (old school design software) can make something like this in about 10 minutes with a scrap piece of hardwood or laminate and a few common woodworking tools.

2909
The tool

2910
Bolt cocked

2911
Bolt decocked

Easy-peasy. :victorious:

[RC20]

You are simply taking all the fun out of this for the younger generation.

Me? I used to have to move tools around far too much, each and everyone was as broad spread as possible.

Difference between a shop mechanic and a filed one is how many tool he has!

[RC20]

Now this is some 3D Printing!

http://www.3ders.org/articles/20170410-norsk-titanium-3d-prints-first-faa-approved-structural-titanium-components-for-boeing-dreamliner.html

[nightram]

Well I have completed it, and in working order. I'll upload it soon for anyone who wants it.


The one I had was destroyed when I put a brand new model 12 bolt in it and tried to remove (you have to cock the bolt to remove) and the cocking pin tore into the plastic.

Sounds like the wall thickness was too thin.




It looks to me its both an un-cock and a cocking device.
Not a cocking device, as when it is uncocked it cannot be removed from the protector. To reiterate it is a bolt storage device.

In some countries, like Australia you may not have the bolt in the rifle during transit. So your options are to put it in something where it can bash around or an alternative is a bolt protector like ones sold all over the world.


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