Questions tagged [technic]

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

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9
votes
1answer
6k views

What are the dimensions of a technic axle?

I'm working on a LEGO compatible motor system that will be largely 3D printed. I want the connectors to fit standard LEGO axles, but I haven't been able to find the dimensions online, and I don't ...
5
votes
1answer
129 views

Technic Firetruck 8289 with different wheels?

I am a bit confused with the Technic firetruck set 8289. The photo on its box: clearly shows it has the wheels 56145c02: however, according to this photo from BrickLink it has 6595c01: In the ...
3
votes
1answer
111 views

What sets are these electrical parts from, dark grey bases and remotes with orange and yellow buttons?

I have been searching for a long time but I am struggling to find the origin for these parts. I think they are possibly Power Functions IR remotes & battery packs...? Thanks for any help.
2
votes
1answer
315 views

Which LEGO set is best suited to build robots?

My goal is to build some educational robot kits for kids and so I'd like to know if there are any LEGO sets that let you build almost anything or can you only can build the specific model that the ...
11
votes
3answers
1k views

Has anyone created a analogue LEGO clock that runs time accurately?

I've seen someone on YouTube create a LEGO Clock with all the wheels and a pendulum, but I was wondering if there is any project or building instructions available to build such a clock with an ...
7
votes
2answers
483 views

Does a 1x3 Lego technic liftarm with two round holes and one axle socket exist? (for tank suspension usage)

I have been searching for some time for parts like these (with no success): But with two holes (instead of three) and one socket for Lego axles at one side. Likewise two holes (instead of one) and ...
4
votes
2answers
134 views

Uses for tracks in 9648

Has anyone used the Tank tracks (429139) from Lego education set 9648 for anything other than a tank? The tracks are fixed in size, and I've found the application rather limited (driver belt, track) ...
7
votes
1answer
161 views

AA Battery Packs 54950c01 vs 59510c01

What is the difference between these two battery boxes, 54950c01: and 59510c01: except for the on/off button? Which electrical connectors are compatible with each of those? Is there a counterpart ...
8
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1answer
2k views

42042 Crawler Crane: conversion to remote control

After many years of "Lego drought", I have decided to reinvest in some. Amongst a lot I have purchased is a Crawler Crane, half built, with all the parts to complete the build. However, instead of ...
2
votes
1answer
671 views

What Technic set should I get for general Technic MOC?

I want to do some small machines in these books, But the sets recommended by the author are super expensive (set 8043 8053). LEGO Technic Sets I Recommend (December, 2010) Honestly, it is hard to ...
6
votes
3answers
480 views

Is there any way to connect “sideways” to an axle?

There are some pieces whose middle part is shaped like a Technic axle, but that have elements on both ends that make it impossible to insert them into a normal axle or Technic hole: This makes me ...
3
votes
0answers
211 views

Any cheap Technic sets with a good variety of parts?

I want to start building a module like GBC mini loop 001, but when I check the part list some are very hard to get. How should I get started? BTW, I got a very big set, Bucket Wheel Excavator 420555,...
4
votes
2answers
359 views

How can I improve my rackless steering design?

I am trying to build a vehicle with a sturdy steering mechanism powered by the servo motor. When I was a kid I did this all the time with a rack and pinion design, but now I don't have any of the rack ...
3
votes
1answer
176 views

Clutch gear test

I have two white 24t clutch gears, one marked as 2.5-5Ncm and another unmarked - how can I assembled them in a way to test which one "gives" first ) i.e. has torque before it slips - I was thinking to ...
1
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0answers
115 views

Linear Actuator Clicking

I have just finished working on a mock-up landing gear deployment mechanism, keeping it as simple as possible of course. However one thing that I cannot seem to get rid of, is the small linear ...
5
votes
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
144 views

What is the name/number of this Technic brick with two arms ending in tiny clips?

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
votes
1answer
231 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
votes
1answer
203 views

Why are my Technic blue pins breaking?

These connectors are cracking very easily:
7
votes
1answer
355 views

Technic 8858 Rebel Wrecker 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 ...
1
vote
3answers
281 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
votes
2answers
732 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
votes
3answers
640 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
votes
1answer
209 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
votes
1answer
332 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
votes
1answer
152 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 ...
1
vote
0answers
36 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 ...
1
vote
1answer
214 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
votes
1answer
125 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
votes
2answers
239 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
votes
1answer
256 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
votes
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
votes
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
votes
2answers
551 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
votes
1answer
951 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)...
8
votes
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
votes
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
votes
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
vote
1answer
336 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
votes
2answers
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
votes
2answers
820 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
votes
1answer
192 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
votes
2answers
3k 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
votes
1answer
658 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
votes
1answer
395 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
votes
1answer
539 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
votes
1answer
183 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
votes
1answer
104 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
votes
1answer
862 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
votes
3answers
520 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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