Questions tagged [technic]

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

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2answers
4k views

Lego Digital Designer: Having Gears Interact with Toothed Bar

I just started using LDD, and I have been trying out a few things that I couldn't do with the limitations of my Lego collection. One thing that has me caught up is that I can't seem to get the ...
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0answers
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Science fair: “Can Lego's Fly” [duplicate]

I am doing my science fair on "Can legos Fly!" I am going to build a glider and test it 3 times (Independent variable). the wings will be foam. I will test it on how far it flys (Dependent variable). ...
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2answers
600 views

Why are Technic holes slightly smaller than studs?

We know that Lego studs almost never should be placed into Technic holes because studs are slightly larger and will stress the hole. However, why is there this discrepancy? Surely when Lego created ...
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1answer
1k views

Cheapest and Simplest way to build a LEGO Technic car?

Having no LEGO Technic parts at all, I'm looking for the cheapest and simplest way to build a LEGO Technic car which can be combined with two Lego Technic motors to drive forward and backward (phase 1)...
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3answers
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How to power “Power Functions” devices from an electric wall plug?

In this video showing an example of Great Ball Contraption, we can see (at 1:35) that some trains powers are used to power Power Functions motors: That must be more convenient than having to ...
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1answer
2k views

What LEGO Power Function parts do I need to make an RC car?

I'd like to make a remote control LEGO car with steering and forward/back functionality. Looking at the LEGO Power function parts I'm assuming I need the following: A battery (8881 or 8878) A motor ...
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3answers
3k views

Does the LEGO “Power Functions Extension Wire” (8886) work in both directions between old 9V and new Power Functions devices?

Here is the LEGO "LEGO® Power Functions Extension Wire" (8886): We can see that the left connector can connect to old 9V electric bricks or wires and the right connector can be plugged to the new ...
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1answer
396 views

How do LEGO Technic pneumatics parts age?

I recently bought LEGO Technic 8868 (Air Tech Claw Rig) and 8460 (Pneumatic Crane Truck) models. I noticed that the pneumatics tubes seem to have been changed since the colors are different from the ...
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2answers
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LEGO Submarine waterproofing functional parts (e.g. motors, RC receivers)

From my understanding, the motors and RC receivers are not waterproof. Thus, the LEGO submarine from Sariel's LEGO® Workshop rust after sometime. So, is there any way to make the motors and RC ...
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2answers
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How to buy a lot of LEGO Technic bricks?

At first, I bought 6 lbs of LEGO Technic bricks. however it was dirty and used. Also there were only holed bricks and I can't find many gears or axles. I want to make Technic creations or MOC's, but ...
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1answer
205 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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2answers
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How to speed up the disassembly of large LEGO technic sets?

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
735 views

How to disassemble this small Technic turntable, combination of parts 99009 and 99010?

How should I non-destructively disassemble the following parts, when they are newly assembled? 99009 Light Bluish Gray Technic Turntable Small Bottom 99010 Black Technic Turntable Small Top
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1answer
417 views

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
605 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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1answer
193 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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1answer
107 views

Why remote controls are seldom used in Technic sets?

(As of Jul 2016) According to this, it mention that currently there are a total of 376 Technic sets. However, this information mention that only 6 of them have the remote control function. This means ...
3
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1answer
881 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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3answers
534 views

Is it 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
2k 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
245 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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1answer
279 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
692 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?
5
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2answers
703 views

Tools to unbuild a model more easily?

Are there any good tools out there to help unbuilding a model, for example removing axles from beams? Something like the famous brick separator, but for Technic models.
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2answers
978 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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2answers
1k views

Why didn't LEGO make a Creative Building Box for Technic parts?

LEGO has many great Creative Building Boxes, especially the LEGO 10697: XXXL Box. Why hasn't LEGO come out with a Creative Building Box that consists of Technic parts?
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634 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
421 views

How to motorize Technic 42040 Fire Plane

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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2answers
418 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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2answers
1k 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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1answer
150 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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1answer
198 views

Can you identify these parts? Sliding brick and plate with a groove

Please help me identify these LEGO parts - I'm trying to build them.
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1answer
292 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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2answers
374 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
281 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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1answer
176 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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2answers
302 views

What is the name of this almost triangular shaped 3x5 Technic beam?

Okay so, I've been on BrickOwl.com for the past day or two, trying to find the names of the pieces 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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4answers
684 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
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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1answer
353 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. ...
3
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1answer
290 views

Eneloop NiMh batteries not powering 42030 loader

Is it because the batteries are only 1.2V? It works fine with Duracell alkaline batteries.
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1answer
651 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
326 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
80 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
408 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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3answers
280 views

What is the name/number of this brick

I was wondering what the two grey tile like bricks in the image below are? I wish to order some online, so would appreciate knowing their name.
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1answer
2k 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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2answers
3k 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
1k 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.
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1answer
529 views

How much tension can I expect to get out of a lego chain before it starts to give away?

Assuming I am using the technic chain links to make a chain, how much force can I expect to be able to get out of the chain before it breaks? Suppose I am using a 16t gear to directly drive a 24t ...

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