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Questions tagged [technic]

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

5
votes
1answer
111 views

Pin Connector 62462 vs 75535

I wonder what is the purpose of the slot in the 62462 pin connector? What can it be used for, beside from help with part separation? Part 62462 (2005-present) is newer than 75535 (1995-2008), but the ...
11
votes
1answer
8k views

How can I motorize 42077 Technic Rally Car with LEGO Power Functions?

The new 42077 Technic Rally Car set looks really nice, and even has a built-in steering system which can be controlled by a gear on the top. There's also a fair bit of extra room inside, is there a ...
4
votes
0answers
102 views

How to build an arch that is angled out of Lego?

I am currently working on a MOC for the USS Orville and I am trying to figure out the engines. I have gone through a couple of iterations on my current version, but it always buckles under its own ...
1
vote
1answer
103 views

What is the appropriate way to request a creator to add more of their designs to mochub?

There are some brilliant LEGO creators with many designs on YouTube out there who choose to remain anonymous- who put some of their designs on mochub but not others. (In particular ones relating to ...
4
votes
2answers
387 views

LEGO Technic Interface A

A few days ago, a friend offered me one set 9750 LEGO Technic Interface A with the Interface Card and Cable (IBM compatible) but without software. Can someone share the installation software (LEGO ...
4
votes
1answer
320 views

How do I connect a LEGO wheel to axles so it can be powered?

I have a growing LEGO collection, which started with a lot of parts from the generic 10697-1 'LEGO Classic Large Creative Box' set. Sometime later, I bought a bunch of wheels, part numbers being: ...
4
votes
1answer
337 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?
4
votes
1answer
101 views

LEGO 42095 wheels going opposite directions

My son just finished the 42095 Remote-Controlled Stunt Racer and the two wheels go in opposite directions. Have checked and rebuilt and still can’t get it running in the same direction. Can anyone ...
3
votes
1answer
83 views

How to debug gears in the Bucket Wheel Excavator?

My 8 year old is just finishing the Bucket Wheel Excavator. He turned the motor on and there is a significant clicking noise. It looks as though the top gear noted in the picture gets stuck. Not sure ...
4
votes
1answer
100 views

I'd like to build a mechanism to press buttons on a remote control. What is a good basic approach to use?

I have a small remote control like device with about 11 buttons. The centers of each button are placed about 1.1cm apart, and each are about 0.7cm in diameter (this means about 0.4cm between the edges)...
3
votes
2answers
104 views

Has LEGO ever been used in an assembly line or a manufacturing process?

With LEGO Technic and LEGO Mindstorms becoming ever more sophisticated, I wonder if it has ever been used in a real commercial setting to automate parts of an assembly line or manufacturing / research ...
5
votes
2answers
108 views

Any (small) Lego Technic parts not in whole units?

This is aimed at building a GBC module, not to reproduce an actual engine. I need a piston type construction with stroke length of 3 units, which means a crankshaft radius of 1 1/2 units. Are there ...
12
votes
2answers
190 views

Is it possible to dismantle and refurbish an original 870 Technic motor?

I have a couple of ancient 870 motors (the 4.5v ones) that run but don't sound great. I've looked for, but can't find, a guide on how to dismantle them. I'd like to either get in there and clean/...
1
vote
1answer
104 views

What is this piece? 2 axle and 1 pin?

I've been looking around for this piece, google images etc, cannot find it. Any ideas on a part number?
0
votes
0answers
40 views

Is there any software except SR 3D Builder with the ability to simulate the interaction of gears that doesn't require scripting?

I'm aware that one can do that in LDCad but with scripting. Should I invest my time in learning SR 3D Builder or is there any other option? It's just not a very intuitive software for me but I might ...
10
votes
3answers
775 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 ...
8
votes
4answers
244 views

How can I assemble 2 opposing gears so that the axle rotations are perfectly parallel?

Due to the way all the modern LEGO gears are perfectly quarter-turn symmetrical, there doesn't appear to be any way to assembly 2 opposing gears such that I get a 2 perfectly parallel axles. This ...
8
votes
2answers
298 views

Has this building technique been used in an official set?

One of my favorite building techniques is to place a Technic pin into the anti-studs of a brick. This allows two bricks to attach bottom-to-bottom. It's a pretty secure connection, but I'm not sure ...
4
votes
1answer
548 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
5
votes
2answers
203 views

What is a good third party battery box and receiver?

I got the LEGO 4x4 crawler for my birthday and I love it. But there is one slight thing which I hate: it has terrible range when using it outside. I know there is BuWizz which is a third party ...
1
vote
2answers
74 views

Is there any easy, documented or official way to replace pullback mechanism with Motor Set 8293

There are many Technic cars with a pullback mechanism, like 42059, 42073 or 42072. Is there any systematic, easy, documented or official way to replace the pullback mechanism with the LEGO Technic ...
2
votes
1answer
120 views

Where to buy rare old sets?

Does anybody know a good place to buy rare old LEGO sets? I'm looking specifically for old "pneumatic" featured LEGO Technic sets.
2
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3answers
132 views

Parts for “Simple Machine” book by Isogawa-san?

I would like to make some models from The LEGO Technic Idea Book: Simple Machine by Yoshihito Isogawa. It seems the author is using parts of different "Technic" sets. Could you advise where can I ...
5
votes
3answers
135 views

42043 Mercedes Arocs Truck Crane Turntable Sticking

I have recently found that the turntable of the crane has been sticking when turning! Having taken apart the crane and investigated the issue, it seems to be the interplay between the turntable's ...
4
votes
1answer
118 views

Which set is this slope with holes from?

I picked up a bag of loose LEGO at a thrift shop and cannot identify which set this piece comes from: The holes pass all the way through the slope but have small details inside that prevent a ...
3
votes
2answers
143 views

Need advice re Power Functions

My 11-year old son wants to add power to his creations but neither of us know quite how to start this new adventure. He doesn't have any Technic or Mindstorms sets. Looking through sets online, it ...
7
votes
1answer
121 views

What is the three-position lever in the Bugatti Chiron supposed to do?

I've just finished assembling the Bugatti Chiron (42083), and there's a three-position lever in between the two seats that -- probably -- isn't working: one position connects the wheels to the engine; ...
3
votes
2answers
98 views

What does each part do exactly?

It's been a few years since I bought a Lego Mindstorms (v2) which comes with the technic style pieces. There's beams, axels, rods, connectors... but the majority of the times when I'm building (my ...
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 ...
0
votes
1answer
43 views

Problem With Bionicle Joint Sockets

I'm pretty sure that serious Bionicle fans have all dealt with cracking of the joint socket pieces. However, is super-gluing the broken parts a solution? I'm worried that the joint socket won't be ...
7
votes
1answer
1k views

9398 the front wheels rotate in the opposite direction to the rear wheel

We've just finished 9398 4x4 Crawler. Everything looks good, the motors work but the front wheels rotate in the opposite direction to the rear wheels, they also turn in opposite directions. What could ...
0
votes
1answer
285 views

My Lego Technic 42082 wheel stuck and can't move [closed]

After I finished my 1st manual book, I found out that my crane wheel can't move. May I know which part that I did incorrectly?
15
votes
1answer
2k views

How can I make a precise one-way clutch using Technic elements?

I need a mechanism so that if a (NXT) motor rotates forward, it moves one gear, but the other stays still, but if it rotates backwards, the first gear does not move, but the second one does. I found ...
17
votes
2answers
950 views

What are Good LEGO (or similiar) sets to play-prototype machines working with fluids?

I want to play around with fluid engines. I'm aware that LEGO is sometimes used in labs for prototyping kinematic components, are there successful examples of operating with fluids? Have pistons, ...
7
votes
1answer
179 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 ...
3
votes
2answers
222 views

My 9398 crawler going in reverse way

I built 9398 crawler set and everything seemed OK. However, when I moved the RC tumbler up, the crawler went back, and when I moved it down, the crawler went forward. On the battery box I saw ...
10
votes
1answer
177 views

High Torque Subtractors

I would like to use a subtractor in my next RC LEGO tank, as it enables the vehicle to turn on the move, as opposed to stopping and then turning. Unfortunately, the subtractors I have tested so far ...
10
votes
2answers
407 views

Identifying Parts Used For The Escape Hatch of Sariel's Tiger XL Model

I am working on a similar model of Sariel's Tiger XL in prep for my own designs of a few other German WW2 tanks, and need some help identifying a part or two. Does anyone know what are the two parts ...
8
votes
2answers
118 views

Smallest rubber wheel that can be turned by a technic axle

What the smallest rubber wheels that can be turned by a Technic axle? This is what I have so far Wheel Full Rubber Balloon with Axle hole #4288 Background: I'm building a GBC and I want to push the ...
9
votes
3answers
135 views

What's the best way to start an 8 year old on Lego Technic building?

I'm a grandpa trying to start my 8 year old grandson in LEGO Technic building. I am particularly interested in mechanical parts building and motorization. He already loves LEGO and attends after ...
1
vote
1answer
117 views

Problem assembling wings as shown for LEGO Air Race Jet (Technic 42066)

On Page 158 (Step #231) of the assembly instructions for the Air Race Jet, two red rivet bricks are shown being inserted into a wing. But the pieces in question will simply fall through the holes in ...
4
votes
1answer
97 views

Technic bits set

There are LEGO sets containing just a selection of bricks, such as 10717. Are there Technic equivalents with cogs and so-on? If not, what is the best way to acquire a general selection of cogs/axles/...
10
votes
3answers
2k views

How can a Mindstorms robot lift something very heavy?

I have a small LEGO Mindstorms robot and I have to lift something heavy. Now it seems not possible because the motor is not strong enough.
2
votes
1answer
283 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 ...
3
votes
1answer
254 views

Eneloop NiMh batteries not powering 42030 loader

Is it because the batteries are only 1.2V? It works fine with Duracell alkaline batteries.
3
votes
1answer
158 views

Why are my Technic blue pins breaking?

These connectors are cracking very easily:
7
votes
2answers
357 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
1answer
150 views

What part(s) can I use to connect technic liftarms with modules?

I have the following setup: How can I connect the liftarm to the stacked bricks? The holes have different distances, so I can't just use black pins. Any suggestions?
4
votes
2answers
135 views

What are some good purist rotacaster / omni wheel designs?

In robotics, rotacasters or omni wheels are often very useful. It's possible to buy LEGO-compatible ones from some third parties, here's one random example: Unfortunately, LEGO has yet to make any ...
9
votes
1answer
289 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?