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Fabricating scope rings and bases

Posted: Fri Dec 12, 2008 2:36 pm
by penpusher
I have seen a lot of people pay very fancy prices for cheap dovetail/weaver style rails and scope rings.The cheap ones typically cost $10-20 and most are as good as trash.They are sold at a 100% mark up here.

Considering the fact that there is nothing hi-tech about them and that they can be easily duplicated by any experienced machinist at a reasonable price,why has not some one started making these and selling them in the country?

Re: Fabricating scope rings and bases

Posted: Fri Dec 12, 2008 2:49 pm
by yash3_great
I think if some one already has the required setup, they can make it for quite a reasonable price. But then again, the demand for scope mounts and rings is not high because the scopes themselves are not easily available. Scope rings usually being a non-consumable item, there are few chances of someone buying them often. Not enough demand overall to warrant a large scale production.

Re: Fabricating scope rings and bases

Posted: Fri Dec 12, 2008 3:21 pm
by tirths
Excellent topic Penpusher,

I was thing in the same line. Well if I talk about me I am very cost conscious. I always do a make or buy plan may be my work thought me this.

I usually buy ring from hongkong based supplier on ebay and they cost around Rs. 550~650

If I have to do by myself the material which is fit for this are not available instead I have to go for steel which is bit heavy. Secondly the machinist will charge some bucks and third I have to be with the machinist in order to ensure the correctness of the job.

Total cost if I calculate if I make:

Material = Rs. 75
Machinist=Rs. 300
My time= Rs. 500
---------------------
Rs. 875

-Tirtha

Re: Fabricating scope rings and bases

Posted: Fri Dec 12, 2008 3:52 pm
by pkjeetesh
check what I made out of my IHP .177
Re-size the picture to 640x480 and post it again. Thanks.

Re: Fabricating scope rings and bases

Posted: Fri Dec 12, 2008 4:10 pm
by penpusher
Tirths,

Any problem getting them through customs?

Pkjeetesh,

Looks good.Does it shoot to the point of aim?

Re: Fabricating scope rings and bases

Posted: Fri Dec 12, 2008 4:12 pm
by yash3_great
Nice work Jeetesh. What scope is that and how did u manage the scope rails?

Re: Fabricating scope rings and bases

Posted: Fri Dec 12, 2008 4:29 pm
by pkjeetesh
I engaged one of my factory machinists to fabricate and machine the rail out of a 11mm long x 3mm thick mild steel flat. The mounts used for dimensional reference were of Tasco...the rail was designed/machined to snug fit the mounts...in order to arrest any movement...after checking the eye relief...two screws were tapped on to the rail just behind the mounts...the rail with screws were precision welded at the extreme ends on to the IHP receiver...Im using a 3-9x32 Norconia scope...not exactly airgun rated...Ai sold it to me a while back..it shoots almost straight (1 - 1.5'' gr) at 50m...with enough room in the windage and elevation knobs for further adjustments....the gun has been through 300 shots after the modification which includes a muzzle brake fitting and synthetic breech seal on it also...no complaints so far....

Re: Fabricating scope rings and bases

Posted: Fri Dec 12, 2008 4:37 pm
by tirths
penpusher, no customs problem so far :)

jeetesh, 1.5" group at 50m ??? are you kidding? in 9x you cannot see the group at all!! You really need 12~16x for that.

-Tirtha

Posted: Fri Dec 12, 2008 7:14 pm
by TenX
Well, thinking of someone in India manufacturing scope rings, I guess the biggest hurdle is the number of requirements, and the reach into the market. Few would take the trouble of importing/bringing back a 5000 rupee scope for a 3000 rupee gun :)
The other problem is the varied dispersion of requirements with a handful of gun owners wanting them across different parts of India. Although, I do agree that someone with the setup already in place (for different products(s)) can start making this as another product, made-to-order... :)

Re: Fabricating scope rings and bases

Posted: Fri Dec 12, 2008 8:01 pm
by penpusher
I was looking for scope mounts for the IOF .315.Despite the fact that it is production for donkeys years,there is no decent scope mount for it in the market.The ones that are there are very crudely made.Will have to get one made.So if any one knows a good CAD CAM shop and some one who does small jobs on a CNC machine,would appreciate it.

Posted: Fri Dec 12, 2008 8:21 pm
by cottage cheese
TenX";p="61654 wrote:Well, thinking of someone in India manufacturing scope rings, I guess the biggest hurdle is the number of requirements, and the reach into the market. Few would take the trouble of importing/bringing back a 5000 rupee scope for a 3000 rupee gun :)
The other problem is the varied dispersion of requirements with a handful of gun owners wanting them across different parts of India. Although, I do agree that someone with the setup already in place (for different products(s)) can start making this as another product, made-to-order... :)
The simplest and least expensive method would be to get a set of good quality dies for aluminium extrusion. That would mean a different dies for different sizes- That wouldn't be difficult as there is a standard range of sizes.

All one will have to do is to persuade some of the aluminium extrusion companies to get out a smallish production run- I believe there are quite a few in India.

After that all you have to do is chop-chop carefully and drill precisely, thread, add some allen-screws and finish.

Of course it's not all that simple as I've described, but it'd beat having to machine each piece separately.

Posted: Sat Dec 13, 2008 8:52 am
by TenX
cottage cheese";p="61671 wrote:
TenX";p="61654 wrote:Well, thinking of someone in India manufacturing scope rings, I guess the biggest hurdle is the number of requirements, and the reach into the market. Few would take the trouble of importing/bringing back a 5000 rupee scope for a 3000 rupee gun :)
The other problem is the varied dispersion of requirements with a handful of gun owners wanting them across different parts of India. Although, I do agree that someone with the setup already in place (for different products(s)) can start making this as another product, made-to-order... :)
The simplest and least expensive method would be to get a set of good quality dies for aluminium extrusion. That would mean a different dies for different sizes- That wouldn't be difficult as there is a standard range of sizes.

All one will have to do is to persuade some of the aluminium extrusion companies to get out a smallish production run- I believe there are quite a few in India.

After that all you have to do is chop-chop carefully and drill precisely, thread, add some allen-screws and finish.

Of course it's not all that simple as I've described, but it'd beat having to machine each piece separately.
Yup... You know what is required quite well :)
... But like I said before, the incentive to start a business product manufacture is pretty low in this case. What I mean is, if the manufacturer started to make any other product with the same investment and process, maybe his sales would be higher :)

.. Actually, why does not IHP do it.... they are the right candidate :)

Posted: Sat Dec 13, 2008 8:58 am
by yash3_great
TenX";p="61721 wrote:Actually, why does not IHP do it.... they are the right candidate :)
And with this, they can start building scope rails too on IHP rifles :P

Re: Fabricating scope rings and bases

Posted: Sat Dec 13, 2008 10:05 am
by pkjeetesh
Thirths...groups were observed at site on inspection of the subject target...I agree with you that at 9x you cannot see the shots....

Re: Fabricating scope rings and bases

Posted: Sun Dec 14, 2008 12:53 pm
by fantumfan2003
Jeetesh,

1.5inch group with IHP 35 .177 at 50 mtrs is an incredible job. Congrats. How many shots did you fire for the group and which pellets did you use ? From a rest I suppose ? Nice gun and scope. 8) 8) 8)

Manish
pkjeetesh";p="61638 wrote:I engaged one of my factory machinists to fabricate and machine the rail out of a 11mm long x 3mm thick mild steel flat. The mounts used for dimensional reference were of Tasco...the rail was designed/machined to snug fit the mounts...in order to arrest any movement...after checking the eye relief...two screws were tapped on to the rail just behind the mounts...the rail with screws were precision welded at the extreme ends on to the IHP receiver...Im using a 3-9x32 Norconia scope...not exactly airgun rated...Ai sold it to me a while back..it shoots almost straight (1 - 1.5'' gr) at 50m...with enough room in the windage and elevation knobs for further adjustments....the gun has been through 300 shots after the modification which includes a muzzle brake fitting and synthetic breech seal on it also...no complaints so far....