synthetic seal - how to?

[tirths]

Dear All,

Hope you like it. Sorry I am not very good at taking picture nor good at taking picture on time. Any query on this can PM me or post here I shall be glad to answer.

Picture is worth a thousand words

http://picasaweb.google.com/tublu2008/S ... cSealHowTo#

Was trying to upload in the albums, looks like I don't have permission to do so

-Tirtha

[striker]

Good work
Tirtha for what airgun do u made this ?

sankar

[GasramGandu]

Thanks for sharing Tirths.

GG

[sitar]

nice one

[penpusher]

Tirths,

What material are the rods made of?

[tirths]

Hi penpusher,

I have mentioned it on the rod. Anyway for the seal I have used Polyurethane.

Very strong material and flexible like rubber. Modern Skateboard wheel made of this.

-Tirtha

[biking3819]

Dear All,

Hope you like it. Sorry I am not very good at taking picture nor good at taking picture on time. Any query on this can PM me or post here I shall be glad to answer.

Picture is worth a thousand words

http://picasaweb.google.com/tublu2008/S ... cSealHowTo#

Was trying to upload in the albums, looks like I don't have permission to do so

-Tirtha

great work Tirtha.keep it up,also please post details how is the performance now after the seal change and consistency of power shot to shot.
Also i would be really thankful in case you shed some light on the drill chuck grip about where you bought it from or about the price or did you develop it yourself,it looks to be a very useful attachment for a DIY guy, you had used shown in the 4th picture-
http://picasaweb.google.com/tublu2008/S ... 0264963186
regards sanjiv

[TenX]

This is something I came across during one of my recent visits to a shop retailing photocopying machine supplies.
I found several types and sizes and materials of innumerable washers, seals, pipes, rollers, etc. These materials are of very fine quality, and are made to withstand a high usage of wear and tear.
I saw something like a long tube, which is apparently some type of washer for a roller on the photocopy machine. I bought this for 10 INR, and cut about 6 pieces of washers which fit perfectly well for a .22 IHP Air Rifle. They are more elastic and durable than the 'parchment-type' material supplied by IHP. Also, the fit is better and will probably incur lesser loss of air leakage...

I will post pics of this in a while...

If any of you have access to such shops and have the time.. please check on the wide variety of stuff which can be used for our stuff

[tirths]

Hi sanjiv,

So far I have fired 100 rounds. settling down very nicely shot after shot and it is silent too.

I can tell you more about it next week after more round I will pass it through.

Regarding the chuck grip, I don't remember from where did I purchase it. May be from Castorama (Italy/France) or Commercial Street (Bangalore)-> this guy keeps lots of stuff.

-Tirtha

[tirths]

This is something I came across during one of my recent visits to a shop retailing photocopying machine supplies.
I found several types and sizes and materials of innumerable washers, seals, pipes, rollers, etc. These materials are of very fine quality, and are made to withstand a high usage of wear and tear.
I saw something like a long tube, which is apparently some type of washer for a roller on the photocopy machine. I bought this for 10 INR, and cut about 6 pieces of washers which fit perfectly well for a .22 IHP Air Rifle. They are more elastic and durable than the 'parchment-type' material supplied by IHP. Also, the fit is better and will probably incur lesser loss of air leakage...

I will post pics of this in a while...

If any of you have access to such shops and have the time.. please check on the wide variety of stuff which can be used for our stuff

You are right! IHP is not using right material for the seal. They have molded the plastic to make seal. I am interested to hear others' experience on how the seal looks like after 2000 rounds.

Tenx, if you can let me know the material used in the washer?

-Tirtha

[TenX]

Here is a close up of the roller/washer used in a photocopy machine, which can be used in an IHP with benefits of
1. Snug fit of pellet ensuring lesser loss of pressure.
2. Cheaper and easily available, once discovered. The shown piece is half of the actual roller and should cost 10 INR only...
3. High quality, which is ensured for Photocopy machines.
4. Material is extremely durable.

[TenX]

Click here for a bigger image of the above...

http://i36.photobucket.com/albums/e43/c ... sher-1.jpg

[TenX]

This is something I came across during one of my recent visits to a shop retailing photocopying machine supplies.
I found several types and sizes and materials of innumerable washers, seals, pipes, rollers, etc. These materials are of very fine quality, and are made to withstand a high usage of wear and tear.
I saw something like a long tube, which is apparently some type of washer for a roller on the photocopy machine. I bought this for 10 INR, and cut about 6 pieces of washers which fit perfectly well for a .22 IHP Air Rifle. They are more elastic and durable than the 'parchment-type' material supplied by IHP. Also, the fit is better and will probably incur lesser loss of air leakage...

I will post pics of this in a while...

If any of you have access to such shops and have the time.. please check on the wide variety of stuff which can be used for our stuff

You are right! IHP is not using right material for the seal. They have molded the plastic to make seal. I am interested to hear others' experience on how the seal looks like after 2000 rounds.

Tenx, if you can let me know the material used in the washer?

-Tirtha

The material is like strong rubber. But when I burnt a small piece of it, it did not smell like pure rubber... So I cant say what the material actually is... some sort of 'Rubberized' stuff

[tirths]

When I have started my project I have thought of few things:

1. Shock resistance and Resistence to wear & tear------> Automobile Tyre? POLYURETHANE

2. Self Lubrication and friction free.----> NYLON PA6, POLYURETHANE

3. Heat Proof------------->Automobile Tyre, NYLON PA6, POLYURETHANE

4. Soft.------>POLYURETHANE, Automobile Tyre

Test:
Tyre: While cutting/Sanding the rubber burnt not fit for high-power gun.
NYLON PA6: Excellent but so slippery that I cannot manage it with my Drill-lathe
POLYURETHANE: I was able to do well with it. The material so hard that while cutting I say some spark at the same time it is soft like a rubber. Never heats up but it made the cutting tool hot. I think this is the perfect material which can replace Hornet/Tesla seal if made in lathe.

-Tirtha

[tirths]

please post details how is the performance now after the seal change and consistency of power shot to shot.

Update after 700 pallets fired:

The seal is settled very nicely and the gun is sweet shooter now. Very very smooth. I have striped down the gun again to check deformation if any. As expected, nothing got changed!

Other day, Shankar came to my place and he fired couple of shot and he was equally happy to see the performance.

For his IHP, I have made the seal. Keep an eye on
» My Success and Failure of IHP Tuning post. You will see it there.

-Tirtha