Author Topic: looking for update, poor mans delrin spring guide (Read 6955 times))

GarthThomas · « **on:** December 11, 2011, 06:44:19 PM »

I was just wondering if someone had tried the poor mans delrin spring guide and had any thing to add as far as performance and function since it was posted in Feb.
http://www.gatewaytoairguns.org/GTA/index.php/topic,8330.msg68150.html#msg68150

GarthThomas · « **Reply #1 on:** December 23, 2011, 08:26:41 PM »

I will receiving my new qb57 Christmas morning, I have my freshly made spring compressor and a pile of tools waiting to start the tune, I won't be able to get a better spring guide for a few more weeks. So in the meantime I will give it a try, I've rounded up some plastic jugs and I have been thinking of some details that may need to be solved.

GarthThomas · « **Reply #2 on:** December 25, 2011, 02:14:47 AM »

Merry Christmas, I got to open my present early as a matter of fact I've already torn it apart polished and lubed, and found that my spring guide was so tight all I could do was polish it and square the end (when I stood it on end it had abit of a lean) no room for any shim material. The piston was a different story so I managed to fit some vinegar jug shim stock there. I put about a dozen shots through it so it works. Sounds solid and seems to have plenty of power. I couldn't find any moly in time so I'll be taking it apart in a few weeks when my order comes in and Ill see how things look. I made a mixture of synthetic brake lube, ptfe driveshaft lube and a pinch of graphite so it will be interesting to see how it turned out as well.

LAalex · « **Reply #3 on:** January 11, 2012, 10:41:00 PM »

Garth, I'd be very interested to hear how the vinegar bottle material held up. Let us know approx. how many shots through it when you open her up again.

Scotty

GarthThomas · « **Reply #4 on:** January 11, 2012, 10:57:28 PM »

Well I'm at 650 and alls well, just working on getting a few more gadgets before opening it up. I'll let you know for sure.

n8swag · « **Reply #5 on:** January 28, 2012, 03:45:33 PM »

hey, if any of you are looking for delrin rod or just delrin my company sells it. if youre interested check out dixie rubber and plastics, located in greenville sc. both gene and bob buy from us.

GarthThomas · « **Reply #6 on:** February 17, 2012, 11:50:23 PM »

Well I just removed the vinegar jug shim I had put inside the piston on my QB57.
After 1500 shots it was in good shape, just a light impression of coils. I would recommend it as a good choice for shimming when you have a lot of clearance on your spring guide or in the piston, remember that the diameter of a coil spring grows when compressed so you wouldn't want it too tight inside the piston. I'm replacing it with a tophat made from Acetron GP a product similar to Delrin, I have already made and installed the spring guide with the same material.

Raizer · « **Reply #7 on:** March 02, 2012, 03:59:41 AM »

What about coke bottle plastic, would that work?
Tuning my Hatsan at the moment and the top hat is pretty loose

GarthThomas · « **Reply #8 on:** March 02, 2012, 10:53:22 AM »

I don't think so, If you compare the plastic used for the vinegar jug you'll feel the toughness and slipperyness. The original poster lists some alternate souces of plastic that he found suitable I haven't tried any other.

Tom @ Buzzard Bluff · « **Reply #9 on:** March 02, 2012, 02:14:07 PM »

I've had success sleeving pistons with material from a 2 litre Sprite bottle. Can't recall the name of the material but it has a much slicker surface than bleach or vinegar bottles and is tougher than rawhide. I'd be VERY reluctant to put material from either a bleach or vinegar bottle inside one of my airguns. Plastics aren't totally impermeable and both bleach and vinegar are strong solutions that can do very bad things to ferrous metals!

The soda bottle is very thin and can be rolled into a cylinder the proper size to fill the void between piston and spring to the extent needed. HTH, TOM

Raizer · « **Reply #10 on:** March 02, 2012, 10:04:53 PM »

Soda bottles are made from PET (Polyethylene terephthalate) and the only vinegar bottle I have here is too.
The coke bottle plastic is the perfect thickness for what I want, but will try some milk bottle soon.

4932msmith · « **Reply #11 on:** March 03, 2012, 12:43:21 AM »

I read this last night and had to dig a milk jug out of the trash can. After wiping the clabbered milk off I made piston sleeve for my stock B-3. It's the same type of plastic described in the vinegar jug. The gun was immediately quieter, and recoil decreased(passed that test where you shoot with a pellet on top of the scope). Gun is much nicer to shoot, and seems to be a little smoother now after a hundred shots. Took less than 20 minutes, well worth the time.

Raizer · « **Reply #12 on:** March 03, 2012, 06:08:09 AM »

Just cut up a milk bottle, can feel the difference between it and coke bottle plastic!
But its to thick for my gun, coke botle fits snug between the top hat and spring and also between the spring and the inside of the piston.

KGatLC · « **Reply #13 on:** January 08, 2013, 11:02:30 PM »

How about the plastic from a SAE 30 motor oil bottle? Whatever leeches out of that shouldn't cause any harm to the internals.

Raizer · « **Reply #14 on:** January 09, 2013, 01:26:41 AM »

Coming up 10 months now and the coke bottle plastic I used in my Hatsan is still holding up just fine.

GarthThomas · « **Reply #15 on:** January 09, 2013, 11:17:57 AM »

I found that the plastic I used has held up well also,

Quote from: KGatLC on January 08, 2013, 11:02:30 PM

How about the plastic from a SAE 30 motor oil bottle? Whatever leeches out of that shouldn't cause any harm to the internals.

I wouldn't worry about stuff leeching out as much as whether it was going to disintigrate or deform so badly that it woud interfere with any moving parts. What seems to dictate the source is more the thickness required and what is at hand.

KGatLC · « **Reply #16 on:** January 13, 2013, 12:37:16 AM »

Thanks. The sound of that cocking foot sliding back up the spring has annoyed me ever since I done my lube tune. Everything else is smooth and quiet.

dwalk · « **Reply #17 on:** January 14, 2013, 05:07:51 PM »

Quote from: Tom @ Buzzard Bluff on March 02, 2012, 02:14:07 PM

I've had success sleeving pistons with material from a 2 litre Sprite bottle. Can't recall the name of the material but it has a much slicker surface than bleach or vinegar bottles and is tougher than rawhide. I'd be VERY reluctant to put material from either a bleach or vinegar bottle inside one of my airguns. Plastics aren't totally impermeable and both bleach and vinegar are strong solutions that can do very bad things to ferrous metals!

The soda bottle is very thin and can be rolled into a cylinder the proper size to fill the void between piston and spring to the extent needed. HTH, TOM

coke has acid in it. would that have been absorbed by the plastic container?

GarthThomas · « **Reply #18 on:** January 15, 2013, 01:12:45 PM »

I wouldn't think that the plastic would be absorbing the acid from pop, otherwise you would have those bottles failing after a while. JMO

KGatLC · « **Reply #19 on:** March 19, 2013, 10:47:10 PM »

Had the Silent Cat down yesterday replacing the spring, so I made a piston sleeve out of a 1.5 liter Dr. Pepper bottle. Also made one to put around my spring guide.
You can just barely hear it cock now, and all the noise of the cocking foot riding back up the spring is gone. It's sweet.
Thanks guys, glad I read about it here and tried it.
Think I'll try using it to button the piston on my Mendoza next.

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looking for update, poor mans delrin spring guide

Author Topic: looking for update, poor mans delrin spring guide (Read 6955 times))