3d Printed LP 85 Cylinder Boot

[mehfridge]

I'm not a fan of the commercially available rubber cylinder/tank boots for Steel LP85s, so I created a boot I could 3d print with ASA.

Specifically I'm using the boot with Faber LP85s, both painted and galvanized fit.

Scuba Cylinder Boot (Low Pressure Steel 85) by mehfridge MakerWorld: Download Free 3D Models

This is a tank/cylinder boot for low pressure steel 85cf cylinders. Specifically my cylinders I modeled this for are produced by Faber, but it may fit other low pressure 85 cf cylinders. I designed this model because the only commercially available tank boots for LP85 cylinders is a rubber...

makerworld.com

 

[Jak G]

Nice design, but won't it delaminate at the layer lines? Tanks tend to get a bit of a workout.

 

[mehfridge]

Nice design, but won't it delaminate at the layer lines? Tanks tend to get a bit of a workout.

That is a possibility but I think it's unlikely. Cylinders do take a beating but i don't think it will undergo a large amount of force that would cause delamination. That being said, I've only had them out on 5 dives so far, so it possible they could have durability issues I have not yet identified.

 

[James79]

TPU 95 does well for boots too. I did a conjoined boot for tiny doubles a while back with it.

 

[davehicks]

Wow, a 30-hour print! That's a commitment. Did you consider using a .8mm nozzle for this design?

 

[emoreira]

25 % infill. I do not like this.
I 3D print items that will be submerged with 100 % infill, to avoid water ingestion and compression due to air pockets inside the printed part.
With 100 % infill, I guess that the print time should rise to more than 50 hours.

 

[Saffadiver]

It will fail, ASA can take impact but not a tank. TPU or foaming TPU would be better.

 

[Badger7]

25 % infill. I do not like this.
I 3D print items that will be submerged with 100 % infill, to avoid water ingestion and compression due to air pockets inside the printed part.
With 100 % infill, I guess that the print time should rise to more than 50 hours.

Same. Typically for stuff I'm printing for use at depth I'll 100% infill ABS.

 

[davehicks]

emoreira:
25 % infill. I do not like this.
I 3D print items that will be submerged with 100 % infill, to avoid water ingestion and compression due to air pockets inside the printed part.
With 100 % infill, I guess that the print time should rise to more than 50 hours.

Same. Typically for stuff I'm printing for use at depth I'll 100% infill ABS.

I have some camera buoyancy floats that I have printed in ABS with 2mm walls and 6% infill. The infill is only there to provide scaffolding for the top of the print. These hollow floats have remained watertight for 50+ dives up to 30 meters depth. (I haven't tested deeper yet) If printed with the right set of parameters, even hollow objects can remain watertight.

For an object like a tank boot, who really cares? It's durability that matters for this function. The Boot design is using 6 walls and if you looked at it in a slicer you would see that it hardly has any infill at all. Just a little bit in the base. The overall object is about 99% solid walls.

It's going to work just fine and last a long long time.