Questions tagged [technic]

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

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5
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1answer
2k views

Any tips for aligning gears in LDD?

I'm trying to create the 42052 (Heavy Lift Helicopter), and other Technic sets. Aligning gears' teeth is relatively difficult, and the 'Hinge Align' tool rarely works. Please help!
3
votes
1answer
135 views

What is the name/number of this Technic brick with two arms?

What is the number of the brick shown below? I have been searching, but had no success. There is no number shown on the brick, but it has the LEGO logo.
4
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1answer
194 views

Existence of a Technic 1M Half Beam

I am building a fidget spinner out of LEGOs and need two parts to help it spin better while not being extremely loose. The only part I can think of that would work would be a Technic 1M Half Beam, but ...
3
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1answer
168 views

Why are my Technic blue pins breaking?

These connectors are cracking very easily:
7
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1answer
340 views

Technic 8858 alternate model impossible to build?

I don't mean "difficult", I mean it appears to have an actually impossible instruction. Or am I missing something obvious? Here's the deal (pardon my lack of standard names for parts): I recently ...
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3answers
254 views

How to remove an unslotted length-2 technic axle from a one-way axle hole?

A problem that sometimes occurs during disassembling is an unslotted length-2 technic axle being stuck in some axle hole that is a dead end, i.e., you cannot push the axle out with a longer axle from ...
6
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2answers
707 views

Difference between Linear Actuator vs. Linear Actuator Mini

I'd like to know the difference in terms of usage between the standard Linear Actuator: vs. the "mini" version: Both of these parts provide the really fun mechanic of translating rotational energy ...
11
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3answers
588 views

How do I take out this pin from an axle connector? [duplicate]

I have an axle connector with a blue pin stuck in it. How do I get it out? It looks like this: It's on very tightly. I tried removing it for 5 or so minutes, but it's too slippery.
4
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1answer
204 views

Death Star 10188 Help with step 8 on page 76

On step 8 of page 76 I do not understand what holds the two sections together. The "LEGO Flat Silver Technic Axle Joiner Perpendicular with Extension (53586)" has a smooth bore where it attaches to ...
9
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1answer
311 views

What is the name of the piece that is often used to switch gears?

I have been trying to find this part on BrickLink and have searched every Technic category. I have come up empty. Could someone provide the name of this part so that I can find it on BrickLink?
3
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1answer
147 views

Which system is more efficient?

I got a few XL power functions motors, and want to combine them to make a racing car. Let's get to right to the question: Which one save the most torque power? This one... ...or this one? PS: It ...
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0answers
35 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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1answer
211 views

Piece identification (Sphere)

I was wondering if this LEGO piece is a valid LEGO, and what is its part number? Can it be used in FIRST LEGO League competitions?
2
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1answer
120 views

What technic vehicles are built to scale for 75114 First Order Stormtrooper?

From what I have, 42036 Street Motorcycle is a bit too big but still looks rideable. What other technic sets can be used together with 75114? Can you put it inside 42056 Porsche 911 GTR?
2
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2answers
221 views

Help identifying space-themed sets

I have acquired a 20 pound bag of space-themed Lego pieces that seem to belong to some special Technic set(s). Many pieces and assemblies seem way too unusual to be acquired from a random bulk ...
7
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1answer
242 views

Long train Bridge tension and compression angles (minimum brick count)

Hello master builders. I'm working on my first large project (and first Lego stack overflow question). I'm making a bridge that needs to be 3 feet long. Unfortunately I don't own tons of Lego bricks. ...
5
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2answers
3k 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 ...
2
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0answers
84 views

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). ...
9
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2answers
500 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 ...
5
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1answer
920 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
4k views

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 ...
7
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1answer
1k 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 ...
6
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3answers
2k 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 ...
1
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1answer
294 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 ...
8
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1answer
1k views

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 ...
6
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2answers
746 views

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 ...
4
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1answer
184 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:
5
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2answers
2k views

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?
4
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1answer
623 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
4
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1answer
382 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?
2
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1answer
518 views

LEGO Large Shock Absorber alternatives

Are there cheaper alternatives to Large Shock Absorber with Very Hard Spring (Part No. 15035 / 18405 / 95292 / 95292c01)?
3
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1answer
170 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)
3
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1answer
837 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 ...
5
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3answers
511 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 ...
2
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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 ...
3
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1answer
233 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?
5
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1answer
261 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.)
9
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1answer
586 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
votes
2answers
579 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.
7
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2answers
844 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 ...
3
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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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2answers
599 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 ...
3
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1answer
398 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 ...
7
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2answers
403 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 ...
3
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1answer
141 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 ...
2
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1answer
175 views

Can you identify these parts?

Please help me identify these lego parts - I'm trying to build them.
2
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1answer
284 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 ...
7
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2answers
314 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 ...
2
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1answer
242 views

What is this technic pin?

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