Air Arms T200 Front sight mount, with integral AIR STRIPPER
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Air Arms T200 Front sight mount, with integral AIR STRIPPER
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Topic: Air Arms T200 Front sight mount, with integral AIR STRIPPER (Read 1665 times))
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Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
«
Reply #40 on:
July 06, 2022, 09:17:08 AM »
I found 17 mm OD carbon fiber tube on amazon before specifying the above. In case you can't locate that size, here is a version of the sight base parts for a 18 mm OD tube.
Both STL files are attached.
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Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
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Reply #41 on:
July 06, 2022, 10:01:17 AM »
While the rear tube adaptor has to resist the bending moment of the parts hang out the front, the front sight base does not need to have a 32 mm OD. The versions below have a 26 mm OD. So, lighter parts:
One has a socket for a 17 mm OD CF tube. The other version is for a 18 mm OD tube. STL files attached.
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Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
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Reply #42 on:
July 06, 2022, 10:55:02 AM »
By the way, Bogdan; you mentioned SLS printing. For that, a part with break-off supports will not be required. I think you could print the parts laying down in the powder. No need to stand parts on a narrow end.
So, perhaps no need for me to design parts with break-off supports. Such external braces would be for FDM printing. But, FDM printing experts might have a more calibrated opinion than me. All I know is that my designs don't need internal supports, and if these are used, they are difficult to impossible to remove. I don't know if external supports can be added via the slicer, without turning on internal supports.
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BRBGD
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Real Name: Bogdan
Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
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Reply #43 on:
July 06, 2022, 03:03:35 PM »
Carbon is not available here, but aluminium is, and I found 18/16 tube. Weight is 150 grams per 1000 mm, so it wont be to heavy. Great that you posted files for 18mm tube.
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Belgrade, Serbia
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Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
«
Reply #44 on:
July 13, 2022, 11:50:26 AM »
Hunter and Bogdan,
If you have tried out the LDC and front sight I would appreciate feedback, so that improvements can be made, if indicated.
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HunterWhite
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Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
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Reply #45 on:
July 13, 2022, 12:33:15 PM »
I think that it is lost in the mail.
Hunter
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Arlington Texas
JSAR Mini Raptor, 25 cal,Condor 25, 2240, Umarex Colt, 177 FaTRod😎
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Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
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Reply #46 on:
July 13, 2022, 12:40:51 PM »
That would be a bummer.
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Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
«
Reply #47 on:
July 16, 2022, 12:32:15 PM »
I have created a round version of the S200 LDC (no airtank clearance cut). It also has an overall length of 177 mm, with a 75 mm reflex length.
The point of this version is that it can be used on any airgun with a 15 mm diameter barrel - including the S200 series, if that has a front fill port air tank. The "why" is slightly larger expansion volume in the same "footprint"; and more symmetrical internal airflow.
Rather than one M4 retention screw, there are three evenly spaced ones. The unthreaded hole diameters are a nominal 3.2 mm, that need to be hand tapped to 4 mm. For grub screws 8.5 mm long. I suggest ones with plastic nose inserts to protect the barrel.
The intended muzzle face depth from the rear of the LDC is 75 mm. Easy enough to establish with a ruler and adhesive tape. Because this LDC is round, the rotation around the barrel does not matter.
The STL print file for the .177 caliber version is attached below as a ZIP file.
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BRBGD
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Real Name: Bogdan
Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
«
Reply #48 on:
July 20, 2022, 05:17:27 AM »
Sorry for late reply, for some reason, I cant get to the forum from my MAC, or iPhone, only from my win laptop.
I printed in 2 processes V2, and there are some issues which can be improved.
First, interface between barrel and front sight mount is too tight. It is impossible to be installed as printed. I reamed it with 15mm forstner drill bit for wood, as I don't have 15mm reamer, and while tight I was able to fit it on. As it is really tight, aligning front sight mount to be coplanar with back sight was a bit hard. Original sight mount have much larger diameter, and it is easier to fit on.
Second, issue is that sight mounting dovetail is too narrow for original front sight. Front sight can be mounted, but lower part of the sight mount is narrower than upper part. It works with original sight mount, but I don't know if it will work with replacement front sight, like AHG Race.
These two issues doesn't preclude use of the sight mount, but they require additional work.
Another possible area for improvement is making a shoulder on the exact position of the muzzle, in order to set worm screw exactly into slot on the barrel. As reamed front sight mount is tight, it is hard to position it where it should be, so that screw gets into slot. It took me few trials before I was able to get everything aligned.
I will wait for some time, before I order longer extension.
Another interesting item for the CZ200 will be sight raising blocks in different heights. Aluminium ones are starting to be quote expensive.
I will follow up with few pictures. I also changed tank, added regulator on my gun, and I was suppressed how consistent velocities become. Extreme spreads for 10 JSB Simply midweight were under 1 m/s, eg 3 fps.
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Last Edit: July 20, 2022, 05:20:18 AM by BRBGD
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Belgrade, Serbia
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Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
«
Reply #49 on:
July 20, 2022, 05:36:24 AM »
Thanks for the feedback, Bogdan
I was tempted to PM you to ask about your printed parts.
Pictures will help. Especially of the dovetail interference.
My T200 barrel OD measures 14.92 mm. The stock front sight base ID measures 15 mm. I made the hole in my design 15 mm, and was actually concerned that it would be too loose. The person printing the part usually has some control over printing ID or OD, tight or loose.
I actually offered a stop shoulder for some of my LDC designs. The gentleman who wanted one asked for it not to have a stop shoulder. I can see how a shoulder could help installation.
From my images, the end of the barrel muzzle should be visible in the rear air stripper window (if I remember correctly).
One way to deal with the potential fit problems would be to offer more than one version of each design. Some with a larger barrel hole than nominal, some smaller. The same with the dovetail fit.
If you provide details about raised sight blocks you would like to have, I can create STL files for that.
«
Last Edit: July 20, 2022, 05:39:19 AM by subscriber
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BRBGD
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Real Name: Bogdan
Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
«
Reply #50 on:
July 25, 2022, 05:29:25 AM »
Here is some additional info on the problems I mentioned in previous post.
With of the dovetail on the V2 I printed is 9.5mm, eg 3/8. Original front sight mount dovetail with is 11mm.
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Belgrade, Serbia
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Re: Air Arms T200 Front sight mount, with integral AIR STRIPPER
«
Reply #51 on:
July 25, 2022, 02:12:12 PM »
Bogdan,
Additional dovetail measurement would be useful. Something like the sketch below.
I get that measuring the angle is tricky. The linear measurements will describe the angle. It is just that I have seen sight dovetails with angles from 45 to over 60 degrees; so would not want to guess.
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USA
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Air Arms T200 Front sight mount, with integral AIR STRIPPER