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

2
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1answer
36 views

Confused about power functions motors 8883 and 8293

Is the motor that comes with the technic power functions motor set (8293) and the stand alone motor 8883 the same? We have just built the Lego Creator 10261 roller coaster set and it specifies a 8883 ...
3
votes
1answer
74 views

LEGO part counts on boxes without treads

I want to buy another LEGO Technic set therefore I'm trying to analyze the challenge to price ratio of different sets. I first thought that the part count may be somewhat proportional to challenge and ...
3
votes
2answers
75 views

Repairing disintegrated old 9V wire

I have a number of old technic motors and battery boxes I would like to use however the wires have disintegrated in storage to the point that the metal conductors touch and short out. Does anybody ...
10
votes
1answer
355 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 ...
3
votes
1answer
130 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?
5
votes
1answer
200 views

Fan door does not close completely - Air Race Jet

After completing the Air Race Jet, I found that the upper fan door does not close completely (stopping short by about 1/2 inches) when I switch from VTOL to Flight mode. The attachment points to the ...
0
votes
0answers
38 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 ...
1
vote
1answer
66 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 ...
6
votes
0answers
85 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 ...
4
votes
1answer
102 views

Is there any software for designing and testing Technic mechanisms?

I'm finding Technic parts can be challenging sometimes, and the costs can be high. Is there any 3d design software that can help with designing before I decide to buy the parts?
4
votes
2answers
71 views

What about Power Functions motor, S size?

LEGO Power Functions has motors in M, L and XL sizes. Usually, if someone uses this size designations, the smallest one is S. It would make sense to have them named S, M and L if there were meant to ...
3
votes
1answer
169 views

Is there a list of the most common Lego Technic parts?

I searched the internet for this and I found a list of complete sets. But I am looking for a list of the most common (and in some sense the most important or most helpful) individual Lego Technic ...
3
votes
0answers
92 views

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

I have a growing LEGO collection, which I first started with a lot of parts from the generic LEGO Classic 10697. Sometime later, I bought a bunch of wheels, numbers #55981 and #6014. My question is, ...
2
votes
1answer
88 views

Two separate functions of 5282 remote?

Given the RC set of 5282 and 6272c01 below: Is there a solution to use the two paddles that command the auxiliary output of the receiver for different functions? For reference, see this at 1:45. ...
7
votes
1answer
108 views

Can I still motorize Universal Building Set 8034 and other from that time?

Set 8034 was supposed to be motorized using 8700. Of course, this is way outdated and kinda pointless to buy motor this old. Current set for this purpose is 8293. Problem is, old motor was 5 studs ...
2
votes
1answer
124 views

Is 32013 a drop-in replacement for 3651?

In my old sets there are many 3651 parts that are broken. As far as I remember, these sets do not use studs on the piece. Per this answer, new piece with the same function is 32013: Can I just buy ...
2
votes
1answer
142 views

My 9398 crawler going in reverse way

I built 9398 crawler set. It everything ok, but when I move on RC tumbler up - crawler goes back and when I move down crawler goes forward. On the battery box I see tumbler I changed its position - ...
6
votes
1answer
121 views

LEGO twin-engine airplane (black/yellow/grey) set identification please

Bought this airplane "as is" at a flea market. Pieces missing. I want to repair it. Does anyone here have the LEGO set number or know where I can find the instructions ? I suspect that it is several ...
5
votes
2answers
109 views

Technic Pin/Travis Brick Legal Connection?

Is seating a Travis brick on a Technic pin a legal connection? TLG has used this construction at least once (M-Tron Particular Ionizer's "rotor"), but that was in the early 90s. Will this connection ...
5
votes
1answer
146 views

Is it legal to sell a custom element that provides a Technic pin connection?

I'm wondering if it would be legal to produce a custom piece for Lego Technic and sell it? The piece features 4 compatible connection holes for Technic pins. From what I've researched in the Lego ...
7
votes
2answers
103 views

How do you make a triggered counted ball drop?

Is there any solution on making a drop of a counted number of balls when one ball passes through the system? For example: One ball falls into a hole on the top and ten balls (plus/minus (not ...
2
votes
3answers
185 views

Bucket Wheel Excavator not powering up?

I just finished to assemble the Bucket Wheel Excavator (42055) set, I inserted new batteries in the battery box and tried to power it up. The led on the battery box blinks for a millisecond almost ...
2
votes
2answers
176 views

How do people build large collections of bricks?

How have people built up such large collections of bricks? I would like to get into building Lego Great Ball Contraption modules, but this needs a lot of parts to play with. I've got some Lego from (...
0
votes
0answers
64 views

How can I combine multiple PF XL Motors [duplicate]

I have built an enormous and heavy Lego RC tank, driven by 2 XL Motors, connected to a subtractor, one motor is for steering, the other is for propulsion. Despite having already geared down the motors ...
1
vote
1answer
181 views

Lego Technic 42048 with Lego 8293

I have seen a YouTube Video that claims the motorization of Lego Technic 42048 using Lego 8293. However, the Lego support site does not state such compatibility. I am not able to get my hands on a ...
3
votes
1answer
261 views

Which Lego Technic sets are officially combinable?

Lego sets 42058 and 42059 can be combined together to build a bigger truck. We can find official instruction on the LEGO site. Are there other pairs (or larger groups) of sets like that? I am ...
6
votes
1answer
153 views

Do all technic bushes (3713) have the LEGO label on them?

I have just found out that many of my Technic bushes (3713) do not have "LEGO" printed on them. Does this mean they are fake? I know that many parts were produced in several variations.
9
votes
1answer
1k 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
113 views

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 ...
2
votes
1answer
150 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 ...
8
votes
2answers
335 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 ...
6
votes
1answer
213 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 ...
2
votes
2answers
102 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) ...
6
votes
1answer
104 views

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
votes
1answer
506 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
401 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
281 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 ...
0
votes
0answers
116 views

Any cheap Technic set can have more types of parts?

I want to start build a very module like GBC mini loop 001, but when I check the part list it is very hard to get. How should I get started? BTW, I got a very big set 42055 and wanted to be able to ...
5
votes
1answer
171 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
120 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
vote
0answers
78 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
836 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
125 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.
5
votes
1answer
160 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
140 views

Why are my EV3 blue pins breaking?

These connectors are cracking very easily:
8
votes
1answer
267 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 ...
2
votes
3answers
167 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
288 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 ...
10
votes
3answers
282 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.
5
votes
1answer
187 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 ...