Questions tagged [pneumatic]

LEGO Pneumatics use air pressure and specialised components to perform various actions.

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2 answers
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Most cost efficient length for pneumatic hoses?

As the title says, I would like to know what the most cost efficient length of pneumatic hose (including 99021s) is, assuming the average length of each piece is 12cm (4.7") and I can cut large ...
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5 votes
1 answer
150 views

Broken pneumatic distribution block

I have a first-generation Lego Pneumatic set (nr 8851) that I recently took out of storage. I remembered from the last time I built the set that the pneumatics weren't working and I just confirmed ...
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2 votes
1 answer
177 views

Lego Pneumatic Engine: Possible Damage from Baking Soda and Vinegar?

I have a question on Chemistry.SE about secondary reactions producing something other than CO2, and from a bit of discussion there, the answer seems to be that there aren't any, but some of the ...
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5 votes
2 answers
492 views

How to locate pneumatic leak

I have a simple pneumatic claw with a 2 pump compressor that I built somewhat recently. It worked fine for a while, producing up to 4 bars of pressure, but then the system wouldn't increase the ...
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2 votes
1 answer
579 views

How to motorize a LEGO Pneumatic valve?

I am working on a project that requires remotely switched LEGO valves, and I tried many designs I found, and none of them worked due to the valve causing too much resistance. Does anyone have a ...
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1 vote
0 answers
38 views

How can I fix or prevent my cylinder from not functioning? [duplicate]

So I received a LEGO pneumatic cylinder from a seller on Bricklink today. I received it in nice working condition. I hooked it up it up to my Lego pneumatic engine. Nothing special or fast just a one ...
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7 votes
2 answers
1k views

Is it possible to damage a pneumatic pump/motor by applying too much pressure?

I've recently bought the Mercedes-Benz Arocs model, which contains a compressor (i.e., a pneumatic pump which is operated by an L motor). I was wondering whether you can ruin your pneumatic system ...
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2 votes
2 answers
2k views

What's the maximum pressure one airtank can withstand and how to tell its limit?

I bought a airtank and using it to support many v2 pneumatic cylinders, while I'm using a v1 pump and one motor to pump air to this air tank. Since another airtank or a lego pressure gauge is very ...
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3 votes
1 answer
400 views

How many pneumatic actuators does one air tank support

For example, I want to use air tanks to supply pressure to up to 18 pneumatic actuators (19475c01), but I don't know how many air tanks I should buy to supply the air pressure required by all of them. ...
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4 votes
2 answers
488 views

How to clear off oils in a way that will not damage the plastic?

Especially with the pneumatic cylinders, so it has to not make the metal rust too. Also, it is oxidized vegetable that is stuck in there, inside the pneumatic cylinders. And it started to make it all ...
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4 votes
1 answer
352 views

How can I power my LEGO pneumatic engine?

I have just finished building a simple LPE, but have no means to power it. I live on a farm and have access to a small air compressor, would that work?
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6 votes
1 answer
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What is wrong with a Lego pneumatics system that won't go?

I own a LEGO Technic Unimog U-400 (part number 8110) and have been very pleased so far with the performance of its pneumatic system. However, after storing for just a month or two (after a good 5+ ...
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7 votes
1 answer
225 views

What is the best system for lifting things without pistons?

I am building a big walker thing. It has a mining laser at the bottom that can be lifted on one half, and the other is attached to the vehicle. However, I can't seem to find a way, because the hooks ...
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  • 119
4 votes
2 answers
937 views

What is this cylinder like part?

I found a pair of these among some parts I bought. It looks like some sort of cylinder, which could hold an axle for a piston. Is that correct, and how would I use it then?
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8 votes
1 answer
1k views

Pneumatic pistons getting sticky

My sons "9641 Pneumatics Add on Set" now suffers from stiction. How can this be fixed? Can it be cleaned? Is there a recommended lubricant?
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6 votes
1 answer
608 views

How should I connect two LEGO cylinders with pistons to measure the movement caused by sea waves?

As part of a school project I need to make a model of a snake electricity generator. I would like to build this with LEGO elements, and for that, I need to measure the movements of the cylinders ...
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  • 71
9 votes
2 answers
2k views

LEGO-compatible suction cups?

I'm looking for suction cups that are compatible with the LEGO pneumatic system. I've seen people who have built things with them (on YouTube videos, etc), but haven't found anything on eBay or ...
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13 votes
2 answers
32k views

Which sets currently contain pneumatic LEGO equipment?

When I was younger my dad bought me 5218-1, a technic-based pneumatics set, which, combined with the old motor system to provide a mini compressor system created quite a bit of entertainment and it ...
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15 votes
1 answer
3k views

How to repair leaky pneumatics?

Some of my pneumatics parts, mostly pistons, have seals which no longer prevent the air from escaping completely. On some parts they are unreliable and on others they are not working at all. Why do ...
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15 votes
2 answers
8k views

Is a N2 or CO2 paintball tank a viable power source for a LEGO pneumatic Engine?

I would like to know how a LEGO pneumatic engine would perform when powered with a nitro (N2, HPA) or CO2 tank. I have seen a few RC cars powered with air (from soda bottles), so I am wondering if it ...
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