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35mm scope rings to 34mm? Possible?

Posted By: ChadTRG42

35mm scope rings to 34mm? Possible? - 06/14/18 06:05 PM

I got a free pair of rings that I thought were 34mm from a buddy, but it turns out they are 35mm rings. My 34mm scope slides in the rings when fully tightened up. I'd like to use these if I can. The difference between 34mm and 35mm is .039". If I were to put a ring reducer in the rings with something that is .019" or .020" thick on the top and bottom rings, what could I use as an insert for this that would be durable and hold up? Is this possible? Yes, I know, I'm trying to redneck engineer this!
Posted By: Skylar Mac

Re: 35mm scope rings to 34mm? Possible? - 06/14/18 06:06 PM

What about friction tape?
Posted By: dee

Re: 35mm scope rings to 34mm? Possible? - 06/14/18 06:08 PM

A friend did that but milled a reduced out of aluminum on a lathe.
Posted By: RiverRider

Re: 35mm scope rings to 34mm? Possible? - 06/14/18 07:23 PM

Maybe strips of aluminum cut out of a soda can.
Posted By: QuitShootinYoungBucks

Re: 35mm scope rings to 34mm? Possible? - 06/14/18 08:27 PM

It can be done but I think you're better off swapping them. If you can avoid it, never introduce an additional point of failure to anything mechanical.
Posted By: garyrapp55

Re: 35mm scope rings to 34mm? Possible? - 06/14/18 08:49 PM

Feeler gauge is going to be a uniform thickness. I could bring you some, we have all kinds here at work.
Posted By: der Teufel

Re: 35mm scope rings to 34mm? Possible? - 06/15/18 04:10 AM

I did something similar by using surveyor flagging. I wrapped it a few times around and experimented. It seemed to work.
Posted By: scottfromdallas

Re: 35mm scope rings to 34mm? Possible? - 06/16/18 11:09 PM

Duct Tape of course. It fixes everything.
Posted By: JTPinTX

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 02:49 PM

Aluminum can is .0035, it would take too many layers. I have some die shims cut out of coke cans, that is why I know how thick they are. Beer cans are even thinner. Places like McMaster-Carr sell shim stock. McMaster sells an 8"x12" sheet of 18-8 stainless, .020 thick, part number 9011K912 for $11. They also sell brass, if you think it would be more malleable and more "grabby."

Page for the brass:

https://www.mcmaster.com/#shim-stock/=1dd887t
Posted By: Kthnx

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 03:47 PM

I feel like electrical tape is the fix here!
Posted By: garyrapp55

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 04:39 PM

Originally Posted By: Kthnx
I feel like electrical tape is the fix here!

Because it is so rigid and won't get gooy, degrade, and allow movement?

I say this from first hand experience from years ago, don't use electrical tape.
Posted By: Cast

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 04:43 PM

Yellow Teflon tape.
Posted By: snake oil

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 06:19 PM

Just trade them and get the right size...…..
Posted By: Nogalus Prairie

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 06:23 PM

Sako rings come with inserts - I suppose to prevent marring the scope/ring marks. I believe they are teflon. I’m betting a little internet research would reveal that those or a similar product exists that will fit the bill.
Posted By: Kthnx

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 06:55 PM

Originally Posted By: garyrapp55
Originally Posted By: Kthnx
I feel like electrical tape is the fix here!

Because it is so rigid and won't get gooy, degrade, and allow movement?

I say this from first hand experience from years ago, don't use electrical tape.


Then don't use electrical tape wink
Posted By: Nogalus Prairie

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 07:00 PM

From Midway USA website:



From Sako website:

Posted By: MClark

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 08:09 PM

Get the right rings.
If your scope is 34mm it likely cost a couple grand and is a precision device. To mount it with cobbled up rings that don't hold zero is a waste.
M
Posted By: TFF Caribou

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 08:34 PM

I’m surprised you are entertaining the thought of using the rings chad.
Posted By: J.G.

Re: 35mm scope rings to 34mm? Possible? - 06/20/18 10:24 PM

Originally Posted By: Tff caribou
I’m surprised you are entertaining the thought of using the rings chad.


+1

Chad,

Come on, man!!
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