A more advanced form of LEGO®, allowing for the creation of more realistic working parts.

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How to speed up the disassembly of big LEGO technic sets (e.g. 42043 Mercedes-Benz Arocs)

Is there any ways to help speed up the disassembly process for big LEGO Technic set such as the 42043 Mercedes-Benz Arocs?
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1answer
72 views

Can using a hex key to disassemble LEGO Technic pieces cause damage?

Does using the right size hex key (Allen key) to speed up the disassembly process cause damage to the LEGO Technic pieces?
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Metal Spring for LEGO MOC Simple Suspension

What is the most appropriate dimension (e.g. 20mm x 3.33mm, 5N/mm) of the metal spring for this LEGO MOC Simple Suspension so that it will not cause damage to the LEGO part surrounding it?
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1answer
88 views

How to speed up assembly for big LEGO technic sets (e.g. 42043 Mercedes-Benz Arocs)

Is there any ways to help speed up the assembly process when building big LEGO Technic set such as the 42043 Mercedes-Benz Arocs?
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1answer
44 views

Are there any LEGO sets that have these two parts?

Are there any LEGO sets that have the following parts: Part 57518 (Link Tread Wide with Two Pin Holes) Part 15035 / 18405 / 95292 (Large Shock Absorber with Very Hard Spring)
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28 views

LEGO Large Shock Absorber alternatives

Are there cheaper alternatives to Large Shock Absorber with Very Hard Spring (Part No. 15035 / 18405 / 95292 / 95292c01)?
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Is is possible to build a decimal to binary converter (binary counter) with LEGO?

I have seen many papers on logic gates built with LEGO, but I want to make a decimal to binary converter. There should be a counter as an input, with each press of the counter, the output 8 block ...
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1answer
31 views

How to convert a bar into an axle or pin - Using the Axel Hub with Four Bars

I would like to utilize the Axle Hub with 4 Bars (#48723) in a way that the four bars would become axles. What is the most concise way to accomplish that? Here is a diagram of my end goal:
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1answer
39 views

How to disassemble this Technic combination - Part 99009 from Part 99010?

How should I disassemble the following parts that is newly assembled non-destructively? 99009 Light Bluish Gray Technic Turntable Small Bottom 99010 Black Technic Turntable Small Top
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1answer
60 views

Best set to build a tracked vehicle?

I want to build a tracked "all-terrain" vehicle myself (MOC), which should have the ability to climb over obstacles. Something alike https://www.youtube.com/watch?v=PXVO-wbWKxo Now I'm looking for ...
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1answer
110 views

How to disassemble this Technic combination?

How should I disassemble the axle (7) attached in this model? (I tried using a Brick Separator but failed to remove it.)
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1answer
106 views

Is it possible to build a steering system without using gear racks such as part 87761?

Is it possible to use part 6575 (and together with other Technic pieces) as an alternative to part 87761 for a steering system? (I am trying to use Technic pieces from Technic 42030 set to simulate ...
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1answer
97 views

Non-working technic system

Recently I've been working on a car which when going forward is fast, and when going backward automatically goes slowly. Here are two photos of it: (Just replace the text by "input") As you can see,...
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6answers
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Can an axle be removed from this Technic 'brick paradox'?

This blogpost on Technic Bricks briefly explains a few 'brick paradoxes' or dead ends. This particular model seems impossible to disassemble by hand: How can I remove the axle without damaging/...
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1answer
73 views

Lego controller 8879

How does the Lego technic 8879 controller work? When you make it go forwards/backwards and let go does it stay at that speed like the more recent helicopters or does it go back around? And how does it ...
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4answers
5k views

Why does LEGO now use studless technic designs?

It seems to me that sometime between 1998 and 2006 (between the Mindstorms RCX and NXT), LEGO switched from using studded technic bricks (like this:) to studdless beams (like this): In my ...
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4answers
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Is it possible to build simple logic gates with LEGO mechanics?

I built a simple bitshifter in Minecraft yesterday. I wondered if something like this could be built with LEGO? Maybe there is a possibility to build gates with rubber bands and those movable ...
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1answer
109 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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2answers
112 views

Tools to unbuild a model more easily?

Are there any good tools out there to help unbuilding a model? I.e., removing axles from beams, ... Something like the famous http://shop.lego.com/en-US/Brick-Separator-630, but for technic models.
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2answers
79 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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1answer
120 views

What are the measurements of the different Lego instruction booklets?

I've noticed that there are at least three different sizes (eg 7.8"x5", 4"x5.8" and 7"x8"). Are there other sizes?
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2answers
78 views

Is there a particular reason why LEGO did not come out with Creative Building Box for Technic parts?

LEGO have many great Creative Building Box such as the Lego 10697: XXXL Box. Why LEGO did not come out with Creative Building Box that consist of Technic parts?
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2answers
311 views

Where can I get threads compatible with LEGO pulleys?

Have LEGO threads ever been produced? Even the biggest LEGO rubber band is too short to meet my requirements. I need them for this year's WRO challenge. Note that the challenge only allows Lego ...
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2answers
85 views

Lego Technic Unimog, crane will not turn

I finished the Unimog from LEGO 2 or 3 years ago, and I noticed this issue, but now I'm getting pretty angry because I still can't find the problem. It seems to be that when I use the instructions ...
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1answer
93 views

How to motorize Technic 42040

Where can I find instructions on how to motorize the Technic Fire Plane. We have the kit 8293 which contains a motor, battery box, lights and switch, but we have no idea how to attach them. Will ...
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1answer
120 views

What are good books for building techniques of LEGO Technic

I've been searching for good resources for especially LEGO Technic. I find the Unofficial LEGO Technic Builder's Guide by Paweł “Sariel” Kmieć. The book is very good at explaining things. Beside that ...
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658 views

How to straighten 32L axles?

I have a number of the 32L technic axles, but most of them have some bend to them. Is there a straight-forward way to straighten these? Trying to bend them by hand has not seemed to change anything, ...
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1answer
88 views

Eneloop NiMh batteries not powering 42030 loader

Is it because the batteries are only 1.2V? It works fine with Duracell alkaline batteries. Thanks in advance.
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1answer
3k views

Virtual LEGO / Technics / Mindstorms simulation environments

I know that there are quite a few LEGO CADs floating around, but are there any physically correct simulation environments for models built with LEGO / Technic / Mindstorms parts, that would, for ...
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2answers
144 views

What are these Technic sets with figures?

So I'm trying to identify these two LEGO sets that are rather old. I have long since lost the instructions and I can't seem to find the specific parts on BrickLink. Here are the photos of the complete ...
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1answer
89 views

Reference LEGO Technic 42043

When installing the tubing starting on page 273 of the instruction booklet, the suggested length seems to be too short for the installation. Is it permissible to cut the tubing provided to fit the ...
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1answer
116 views

What is the name of this almost triangular shaped Technic beam?

Okay so, I've been on BrickOwl.com for the past day or two, trying to find the names of the peices for a LEGO GLaDOS that this guy made because he doesn't give the names, at around 12:50 he uses this ...
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1answer
84 views

What is this technic axle?

In this video, Kooberz uses this piece: You can see it in action in this video at 15:06. What is the piece?
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154 views

What is this technic pin?

In Kooberz' video, he uses a techinc pin that looks like What is it called?
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1k views

What are the torque limits of gears?

I am using Lego in the classroom to introduce students to geared machines. As part of this I am asking them to design a winch, using a small 1.5V DC motor and a collection of the common Lego gears, i....
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2answers
127 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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2answers
306 views

How much torque can a lego axle handle?

from to this question, it seems that the gears are stronger than the axles, which begs the question of how strong are the axles? if you connect one of the stronger motors, such as say the buggy motor: ...
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1answer
113 views

How to make a regular pentagon from technic bricks

For the purposes of this build, we need a pentagon (figure with 5 sides), that is regular (all sides have equal length), and it needs to be able to be mounted on a build (like a wreath) by a technic-...
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2answers
303 views

How do I diagnose a problem with electronic bricks and motors?

My children and I recently assembled the 42030 RC VOLVO L350F Wheel Loader (aside: with the 1,600 pieces and time investment, this set will likely survive to the heat death of the universe intact ...
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1answer
104 views

How to Motorize the LEGO Mars Rover

I am looking for some suggestions. My daughter is building the Mars Rover set (go here for the details: http://www.eurobricks.com/forum/index.php?showtopic=98222) for a presentation at school and I ...
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1answer
133 views

What part(s) can I use to connect modules at a 90 degree angle?

I'm looking for brainstorming! All ideas welcome. I have a design I'm working on which: is made of a bunch of identical modules fitting into a single framework has to allow the modules to "plug in" ...
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1answer
89 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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2answers
3k views

Exact dimensions of studless Technic beams

I'm looking for the exact dimensions of the studless Technic beams. I found a number of answers for studded beams but there are some more aspects for the studless beams which are not covered. I'm ...
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1answer
501 views

Alternative for Technic, Gear Rack 1 x 7 with Axle and Pin Holes?

We are trying to build a MOC which requires Technic, Gear Rack 1 x 7 with Axle and Pin Holes and we don't have that. Could we build it? Or are there any alternatives? FYI we do have Technic Gear ...
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4answers
5k views

How to make a conveyor belt with LEGO parts?

I am making a small robot with an Arduino and Technic LEGO powered by stepper motors. I am planning on moving small rocks throughout my machine. Does anyone have an idea of what kind of Technic LEGO ...
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1answer
64 views

Having trouble pushing 6.6L bar into pin connectors

I have a dilemma where I am trying to push a 6.6L bar(4095)through 3 stacked pin connectors(62462) that have 1 long pin(6558) and 2 pins (4459) inserted. The bar only goes in a little bit and then it ...
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2answers
335 views

Can you identify this yellow crane?

Can you identify this one? It's part of a series of models I had as a kid that I want to take apart for my own kids now, and I'm looking for the original instructions.
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1answer
190 views

Can you identify this model of a yellow truck?

It's part of a series of models I had as a kid that I want to take apart for my own kids now, and I'm looking for the original instructions. Can you identify this one?
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1answer
99 views

How much current do the LEGO motors draw?

I'm building a project with Raspberry Pi and some other electronics driving the LEGO Power Functions M-Motor (8883) and I need to know how much current those motors draw under load. Has anyone done ...
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1answer
146 views

Instruction for installing rc to LEGO unimog

I'm searching for an instruction to install a remote control to my LEGO unimog. There are a log of youtube videos showing completed unimogs but I can't find any instruction.