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WNTS

Well Nut Trigger System

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Poll: animal Poll (86 member(s) have cast votes)

What Animal does rev1 WNTS look more like?

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#1 thedom21

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Posted 20 August 2011 - 05:43 PM

Intro
This is not as much about the actual blaster as you can vary that to fit your wants/needs. This is a write up on how I made mine but to also get this trigger design out there as it is simple, cheap, and the parts can be bought from your local hardware store. This is rev1 so yes it has flaws but I figured I would make this write up so others can make their own version and we can collectively from what we learn by making our own combine our ideas to make the ultimate blaster.

Materials
Trigger
1/4" x 3" carriage bolt
1/4-20m rubber well nut part# 83115 at Menards
Small spring(I just got this one out of my box of springs)
#6 O-ring
Body
3/4" Pvc
1/2" Pvc
3/4" T-joint
3/4" coupler
3/4" end cap
3/4" x 1/2" reducing bushing x2
1/2" 90 degree elbow

Tank/pump
1" Pvc
1/2" Pvc
1" coupling x2
1" 90 degree elbow
1" x 1/2" reducing Bushing
1" x 1/2" reducing bushing female thread
1/2" male threaded adapter
1/2" x 3/4" reducing bushing
3/4" 90 Degree elbow
Pump of your choice

Adhesives
Solvent weld
Super Glue
Hot glue

Other
E-tape

Cost
Depending on your pump between $14-$20

Time
Took me about half an hour to build not including cure time.

Tools

Minimum Requirements
Hacksaw
Sandpaper
Hobby Knife
Drill

Helpful Tools
Miter Saw

Assembly

This is how the blaster will be assembled
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Body

Put one or your 3/4" x 1/2" bushing onto your T-joint and a 1 1/2" segment of 1/2" pvc in that.
(this picture is wrong don't put that 1" x 1/2" bushing on yet)
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Drill a hole as centered as possible in the 3/4" T
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Next cut 2 2" segments of 3/4" pvc and assemble on one side of your 3/4" T like so.
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Put another 3/4" x 1/2" bushing in the T followed by a 1 1/2" segment of 1/2" pvc followed by a 1/2" 90 degree elbow. This is where you barrel will go. I like to use a hopper setup.
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This is what you should have so far.
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Now we are going to put the trigger on.

Its pretty self explanatory but for all you idiots out there, Assemble your parts like shown. (there should be an O-ring between the spring and the T)
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Now push this assemble into the corresponding holes and screw the bolt into the well nut.
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Yes its that easy!

Just in case I filled this hole with goop.
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Tank/pump

Sorry no picture of this but you want to assemble your parts like this,
3/4" x 1/2" bushing.....in 1" coupler.....7" of 1" pvc in the other side.....1" elbow.....2" of 1" pvc.....3/4" x 1/2" female thread bushing.
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All these parts need to be solvent welded together as they will be holding pressure.

Now to attach your pump to your tank if you used the same pump as I did. IF you used a different pump then use your brain and figure something out.
Take your 3/4" elbow and put a 3/4" x 1/2" bushing in one side. Then put a 1 1/2" segment of 1/2" pvc in that with a 1/2" male adapter on that.
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These pieces also need to be solvent welded together.
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Put some E-tape on the pump so it fits in the elbow nicely. Put a few drops of superglue on it and push it in as far as it will go.
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Then put solvent weld to seal it off.
Use this
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Wrap the threads of the male adapter in Teflon tape and screw it in. You end up with this.
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You can now put the segment of 1/2" pvc from the trigger into the 3/4" x 1/2" bushing of the tank.
Pump it a few times to make sure it doesn't leak and you trigger works. If all works correctly you can solvent weld them together. You end up with this with your pump of choice on the bottom.
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Ranges

With slugs and 14" pvc barrel with 12" of nested PETG I am getting 90-100 flat with 9 pumps. You can't pump it past 10 pumps otherwise you will break the pump shaft. So I guess that is an oprv of sorts for you. rev2 will have a built in oprv and an almost semi auto system that is optional.

Edited by thedom21, 21 August 2011 - 01:03 AM.

  • 0
Funny Irc moments

22:32 hookerninja I would just switch to 2 full 69's
22:32 hookerninja that would diddle shit

11:44 Zorn Her butt is too tiny even for limp 6th grade penis?
11:44 Zorn ergo the dildo

#2 roboman

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Posted 20 August 2011 - 11:26 PM

Hey, look, I'm the first one to comment.

Anyways, I like it. It kinda reminds me of a giraffe...
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#3 arfink

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Posted 20 August 2011 - 11:27 PM

Looks nice. Like a cheaper version of a JSPB. Cool!
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#4 Blue

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Posted 21 August 2011 - 12:04 AM

I think it looks more like a gazelle than a giraffe.
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#5 thedom21

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Posted 21 August 2011 - 12:14 AM

Whatever animal gets the most votes gets that animal themed PJ on it.
ON topic: thanks for the compliments.
  • 0
Funny Irc moments

22:32 hookerninja I would just switch to 2 full 69's
22:32 hookerninja that would diddle shit

11:44 Zorn Her butt is too tiny even for limp 6th grade penis?
11:44 Zorn ergo the dildo

#6 roboman

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Posted 21 August 2011 - 12:30 AM

You're welcome! I like the overall simplicity of the system.

You should do an animal poll.
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LS and Retaliator boltsleds are currently available at https://www.facebook.com/RoboM8/


#7 thedom21

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Posted 21 August 2011 - 01:07 AM

Animal Poll: check
That's what I was going for with this gun. Cheap and simple.
  • 0
Funny Irc moments

22:32 hookerninja I would just switch to 2 full 69's
22:32 hookerninja that would diddle shit

11:44 Zorn Her butt is too tiny even for limp 6th grade penis?
11:44 Zorn ergo the dildo

#8 thedom21

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Posted 21 August 2011 - 12:22 PM

UPDATE REVISED TRIGGER

I was having sealing issues with the trigger and I thought it was just because they were poorly built but after building 3 more I realized that wasn't it. So I came up with a revised trigger design.

For the new trigger you need an O-ring. The one I used was from a broken hornet pump.

Here is the new setup.
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Slip the O-ring on like so.
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EDIT you are going to want to super glue the o-ring on, If you don not is sometimes gets stuck in the pvc so you can't fire it.

Bevel out the sch80 pvc. Here it is next to some non-beveled stuff.
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Assemble like so.
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I also filled this hole with hotglue.
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It now seals perfectly every time. Next update will be with my finished homemade pump.


EDIT: Video update on it.

Edited by thedom21, 21 August 2011 - 11:19 PM.

  • 0
Funny Irc moments

22:32 hookerninja I would just switch to 2 full 69's
22:32 hookerninja that would diddle shit

11:44 Zorn Her butt is too tiny even for limp 6th grade penis?
11:44 Zorn ergo the dildo

#9 arfink

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Posted 21 August 2011 - 08:55 PM

I LOVE this. I will be modifying my "land pattern airgun" to use this valve as opposed to the check valve in future. It's amazing.
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A2GS + 4 meg RAM + 128 meg CF + 9600 Baud Lantronix = WIN

#10 thedom21

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Posted 21 August 2011 - 11:22 PM

Thank you arfink, I hope to have a few at the next MN war.

UPDATE
Upon further testing I realized sometimes the balster wouldn't fire and the problem was the O-ring got stuck in the PVC and was just sliding around on the well nut. The solution to this is to superglue your o-ring on.
  • 0
Funny Irc moments

22:32 hookerninja I would just switch to 2 full 69's
22:32 hookerninja that would diddle shit

11:44 Zorn Her butt is too tiny even for limp 6th grade penis?
11:44 Zorn ergo the dildo

#11 roboman

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Posted 21 August 2011 - 11:26 PM

UPDATE
Upon further testing I realized sometimes the balster wouldn't fire and the problem was the O-ring got stuck in the PVC and was just sliding around on the well nut. The solution to this is to superglue your o-ring on.


I really don't suggest using super glue on an O-ring, it tends to shorten the life of the rubber. I'd suggest something more rubbery, like silicone, or even hot glue. I'm sure Goop/E-6000 would work just as well.
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LS and Retaliator boltsleds are currently available at https://www.facebook.com/RoboM8/


#12 VelveetaAvenger

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Posted 22 August 2011 - 01:42 AM

First off this is pretty cool, very neat design.

However, I'm going to need to hear an explanation from all the giraffe people.

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I mean seriously, have you guys never been to a zoo before?

↓ I could see thinking that at first, I just thought it was crazy it was getting more votes after the much more fitting gazelle was suggested. I had to take action!

Edited by VelveetaAvenger, 22 August 2011 - 02:59 AM.

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"I never saw Beastmaster, I just wanted to be cool..."

#13 roboman

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Posted 22 August 2011 - 02:44 AM

Sorry for the tangent, but it just struck me as a giraffe, for some reason. Apparently, other people agree with me, because "Giraffe" is winning by two votes. I think it would look more like a giraffe if the distance from the tee to the elbow was increased, but I digress.

Back on topic, I'd really like to see some pictures of a completed blaster with a pump...
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Youtube

LS and Retaliator boltsleds are currently available at https://www.facebook.com/RoboM8/


#14 thedom21

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Posted 23 August 2011 - 08:10 AM

UPDATE 2 HOMEMADE PUMP
SO all the store pumps I bought kept breaking on me so I decided to make a homemade pump.

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Write up coming soon, Probably tomorrow as I will not be home all day today.
  • 0
Funny Irc moments

22:32 hookerninja I would just switch to 2 full 69's
22:32 hookerninja that would diddle shit

11:44 Zorn Her butt is too tiny even for limp 6th grade penis?
11:44 Zorn ergo the dildo

#15 arfink

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Posted 23 August 2011 - 12:22 PM

That's real purdy. Looks like you've just re-worked the basic components of the JSPB design into a much cheaper to build homemade. I am seriously jealous.
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A2GS + 4 meg RAM + 128 meg CF + 9600 Baud Lantronix = WIN

#16 Edible Autopsy

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Posted 24 August 2011 - 01:56 PM

Sooo...I can't find a well nut. The guys at my menards dont even know what it is. -.-
Who else should carry them?
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Hot glue is my best friend.

#17 Ryan201821

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Posted 24 August 2011 - 02:13 PM

Based on what Dom told me, this should work well.

Even though I've already told you, nice job on this Dom.
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#18 thedom21

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Posted 24 August 2011 - 02:25 PM

Sooo...I can't find a well nut. The guys at my menards dont even know what it is. -.-
Who else should carry them?



Based on what Dom told me, this should work well.

Even though I've already told you, nice job on this Dom.

Ask for part number 83115 at Menards. It should be in the drawers by the hadndi-pack's of nuts and bolts and other hardware. ON the drawer there is a picture like the one to the right on the McM page. If they don't have it try ace. If all else fails you can just order from McM

Ryan thanks for the compliment, That looks like it should work.
  • 0
Funny Irc moments

22:32 hookerninja I would just switch to 2 full 69's
22:32 hookerninja that would diddle shit

11:44 Zorn Her butt is too tiny even for limp 6th grade penis?
11:44 Zorn ergo the dildo

#19 shardbearer

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Posted 25 August 2011 - 09:49 AM

This is amazing.
But waaait. So if the o ring is doing the sealing now...can we just use a washer instead of the well nut? Or maybe a washer and nylon spacer to make the same shape as the well nut? Would it be any better to switch? I think the best thing would be a cone of rubber with a nut inside. You could get a really big well nut and make a cone shape out of it, but you would have trouble keeping it flat and regular all the way around. If you made a little nick with your exacto knife or whatever your using air would leak. Wait wait wait. Aubuchon sells little rubber stoppers to put in bottles. just put a hole in it and a nut behind it!

Edited by shardbearer, 25 August 2011 - 10:01 AM.

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#20 thedom21

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Posted 25 August 2011 - 10:47 AM

This is amazing.
But waaait. So if the o ring is doing the sealing now...can we just use a washer instead of the well nut? Or maybe a washer and nylon spacer to make the same shape as the well nut? Would it be any better to switch? I think the best thing would be a cone of rubber with a nut inside. You could get a really big well nut and make a cone shape out of it, but you would have trouble keeping it flat and regular all the way around. If you made a little nick with your exacto knife or whatever your using air would leak. Wait wait wait. Aubuchon sells little rubber stoppers to put in bottles. just put a hole in it and a nut behind it!

There is a few reasons the well nut o-ring combo is better.
Smaller
Well nuts are already threaded and have the hole in them so no need to try and drill a centered hole.
Cheaper its so cheap because the sealing consists of only 2 parts.
Easy to get a good seal.

I am sure there are more but those are the biggest advantages. Another thong you could do is a bigger well nut in 3/4" pvc. This would allow for better airflow to the dart.

Posted Image

Posted Image

Semi auto valve, write up soon to come.

Edited by thedom21, 25 August 2011 - 10:59 AM.

  • 0
Funny Irc moments

22:32 hookerninja I would just switch to 2 full 69's
22:32 hookerninja that would diddle shit

11:44 Zorn Her butt is too tiny even for limp 6th grade penis?
11:44 Zorn ergo the dildo

#21 shardbearer

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Posted 25 August 2011 - 04:03 PM

Thats good points. Though mcmaster 9545k26 looks pretty promising as well.
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