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 Post subject: Gauging bores
PostPosted: Tue Feb 02, 2021 1:45 pm 
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Location: Lincolnshire Wolds
This little stunner arrived today. A gauge set spanning 10,0mm to 20,0mm diameter holes/bores up to a depth of 160,0mm, it came with the manufacturers inspection certificate dated 02 August 1964 by Feinmess Suhl of Germany plus some more recent calibration data. That gauge does indeed measure to 1 micron and a quick test in a gauge confirms it is accurate. The gauge is in my pocket at the moment to see how much it will move.

What will it be used for? Well measuring the ID's of holes of course!

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 Post subject: Re: Gauging bores
PostPosted: Tue Feb 02, 2021 4:30 pm 
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Location: Middlesex
1 micron = 0.03937 thou that is rather small!

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 Post subject: Re: Gauging bores
PostPosted: Tue Feb 02, 2021 5:04 pm 
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Location: Wolverhampton
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Which means that you can now measure rifle bores accurately. Slug the bore, turn up a simple ring gauge that the slug will just slide into: measure the hole in the ring gauge.
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 Post subject: Re: Gauging bores
PostPosted: Tue Feb 02, 2021 6:12 pm 
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Bend over!
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 Post subject: Re: Gauging bores
PostPosted: Tue Feb 02, 2021 11:53 pm 
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Ovenpaa wrote:
This little stunner arrived today. A gauge set spanning 10,0mm to 20,0mm diameter holes/bores up to a depth of 160,0mm, it came with the manufacturers inspection certificate dated 02 August 1964 by Feinmess Suhl of Germany plus some more recent calibration data. That gauge does indeed measure to 1 micron and a quick test in a gauge confirms it is accurate. The gauge is in my pocket at the moment to see how much it will move.

What will it be used for? Well measuring the ID's of holes of course!

Attachment:
20210202_124554.jpg


Yes, I have something similar in fact I am not sure if I have more than one. I will probably never use it/them I will dig them out they may be of use to you. That's if I can find them my wife reckons I am an hoarder. Not really we just need a bigger house.


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 Post subject: Re: Gauging bores
PostPosted: Sat Mar 27, 2021 10:40 am 
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They are Feinmess Suhl of Germany.

For head spacing I use Go/NOGO gauges, and for bores I use bore gauges. I also make my own gauges for all the obscure stuff such as .303 shoulder gauges, shoulder bump gauges and so on.

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 Post subject: Re: Gauging bores
PostPosted: Sat Mar 27, 2021 3:58 pm 
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Location: Hemel Hempstead
Home club or Range: W&DRC, LCRPC, NRA, NSRA, FCSA, Bisley range, Lydd45 and other where I am permitted to shoot
Ovenpaa wrote:
They are Feinmess Suhl of Germany.

For head spacing I use Go/NOGO gauges, and for bores I use bore gauges. I also make my own gauges for all the obscure stuff such as .303 shoulder gauges, shoulder bump gauges and so on.


Where do you get your Go/No-Go gauges from? I need it for a 300 win mag. And other calibers.
How do you make your own? Aren't they suppose to come from a certified manufacturer?

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 Post subject: Re: Gauging bores
PostPosted: Sat Mar 27, 2021 4:16 pm 
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Ovenpaa is a gun smith and a registered firearms dealer. He manufactures and sells shoulder bump gauges cartridge over all length gauges as well as lots of other shiny stuff. I would guess he uses bought in GO NO/GO gauges for barrel work. Check out his website The shooting Shed.

You will struggle to buy GO NO/GO gauges in the UK actually if you are a registered firearms dealer you may be able to purchase them but they wont normally sell them to some one not in the trade.


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 Post subject: Re: Gauging bores
PostPosted: Sat Mar 27, 2021 4:38 pm 
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Location: Hemel Hempstead
Home club or Range: W&DRC, LCRPC, NRA, NSRA, FCSA, Bisley range, Lydd45 and other where I am permitted to shoot
Alpha1 wrote:
Ovenpaa is a gun smith and a registered firearms dealer. He manufactures and sells shoulder bump gauges cartridge over all length gauges as well as lots of other shiny stuff. I would guess he uses bought in GO NO/GO gauges for barrel work. Check out his website The shooting Shed.

You will struggle to buy GO NO/GO gauges in the UK actually if you are a registered firearms dealer you may be able to purchase them but they wont normally sell them to some one not in the trade.


Alpha1 I wasn't disputing Ovenpaa's abilities, he actually helped me a lot with a trigger on a FN action on a H&R rifle. And I read some of his posts on work he does and I actually was amazed of how much patience he has with guns.
My question is more from my background. In Ro and, in general, in Eastern Block, all things in relation to gunsmithing had to come from a Gov certified factory. In Ro there are only 2: Sadu and Cugir.
I am RFD and I was asking him where to go to get the go/no-go gauges PARTICULARLY BECAUSE I admire his work and how he does things.

I didn't know we, as RFDs and gunsmiths, can make our own stuff for verifying the guns and etc. I thought all those must come from BNP or proof house or something like that. The law is clear as mud in that respect.

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 Post subject: Re: Gauging bores
PostPosted: Mon Mar 29, 2021 10:54 am 
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Location: West Sussex, UK
Home club or Range: Chichester Rifle and Pistol Club
Lovely bit of kit! We have something similar at my work but it rarely gets used as the CMM makes it a little redundant these days sadly. I still break it out occasionally as its easier to set and use if I am just measuring 1 thing quickly.


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