pcantin
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How much usage can a LEGO piece take before it loses its 'clutch power'?
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258 votes

37,112 times Well I did it. I built a machine to test this. It took 10 days until the LEGO at the bottom couldn't stay on anymore. >>> Check my blog for more details

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What are the dimensions of a LEGO brick?
93 votes

This image shows the dimensions in LEGO Units. 1 Lego Unit is 1.6mm (the thickness of the plastic wall). In those units the stud's diameter is 3 (= 4.8mm).

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How do I build a curved wall?
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40 votes

Inspired by Zhaph's wall, this one is made with 1x3 bricks. It has a radius of 12 studs (24 studs diameter). It is connected to the base by the last two studs on each end of the arc. The middle of ...

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What is inside the "weight element" brick?
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36 votes

I did the unthinkable! ...I had to know. I opened one of my two weighted bricks. One of the two ends has a glued on cap that I've cut around using an utility knife. The piece of metal it contains ...

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Which hand is this minifigure extending normally?
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35 votes

I personally consider the left one as up-right ever since I was a kid and that's how Lego place all their hands in their promotional pictures:

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How can I make a working pin tumbler lock?
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29 votes

This would push the pins up and down like a normal key would. Here is the basic system. I don't have time to build to whole thing but this resolves the main problem and proves the feasibility. The ...

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How much weight can a handle of Technic pegs and beams support?
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26 votes

Tristan Lostroh did an exhaustive test of both studded beams and stud-less beams with and without connections. Here are his results: Studless beams are better in tension than studded Studded ...

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Useful machines built with LEGO
26 votes

Here are some examples that caught my attention in the last years: Cambridge scientists are using LEGO Mindstorms in their lab instead of a professional robot, saving them large amounts of money. The ...

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How do I print images onto minifig body parts?
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25 votes

You can do that with scale model water decals. You can buy that in blank sheets and print out your designs with an inkjet printer. You can also use products that help those water decals set (adhere) ...

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Can an axle be removed from this Technic 'brick paradox'?
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24 votes

I reproduced the problem and got the axle out using a sculpting tool (similar to an awl). It's a sharp point made of hard metal. (Soft metal will actually bend, believe me, I tried three tools.) I ...

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What is an Erling brick?
22 votes

The Erling Brick: named by the LEGO Designer Erling Dideriksen, who invented this element in 1979.

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What tool can get two 1x2 plates apart without damaging them?
21 votes

I normally use two big bricks: one on the top and one at the bottom. Then you push down while rotating.

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Cleaning between the studs of a build
20 votes

When cleaning dust from scale models, sculptures, figurines or LEGO models I use an artist 'Fan' brush. This is the best method I've found to clean dust rapidly without damaging models. The fan ...

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How do I change the color of a brick?
17 votes

If it's for a display model (static on a shelf) you could use scale model paint and varnish. Matching the original color will be hard, so don't expect perfection. On the other hand, if your looking ...

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Will playing with a PF train motor by hand damage it?
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16 votes

Unless you do extreme things it should be fine. All the gears insides the Train motors, Power Function motors and the NXT motors are made of Nylon while the pinion attached to the motor is made of ...

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Why did Technic bricks have holes in the studs?
16 votes

I was very intrigued by this question. So I messed around with two LEGO Technic beams, a long one and a short one. The 'pins' at the bottom of the beams are made to fit in the hole on top of the ...

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What are the best LEGO storage options?
16 votes

I've used those stack-able organizer cases for years. They are great for storage and access to the parts is a lot easier than in drawers. Another big advantage over the drawer-organizers is how easy ...

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What are the best options for building a LEGO RC car?
15 votes

Personally I would go with Arduino (on the car) and an Android phone as the controller (via bluetooth). There's plenty of reference on the web about mixing the two. The main problem is interfacing ...

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How do I build a sloped roof with a 60° rake?
15 votes

To keep it simple I would use hinges placed on top of the wall, connect the roof plates and angle them to fit. <-- or --> Edit: You could even add a small plate hinge at the roof ridge, under ...

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Displaying the Star Wars Super Star Destroyer in a small apartment?
14 votes

By using two TV wall mounts, you could put it against the wall on its side. This guy was able to do with the LEGO Millennium Falcon(Ultimate Collector 10179). Here's a link to some pictures that ...

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Waterproofing LEGO bricks
12 votes

I would try liquid latex (liquid frisket) which you can buy in most art supply store. This will not damage the bricks and is easy to peel off. You can apply it using a cheap throwaway brush, either ...

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How can I fix a flattened gear?
12 votes

The material deformation you are seeing is called ‘plasticity’. It happens when a material under stress is deformed and doesn’t return to its original shape (this would be called elasticity). In ...

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How can I motorize City-scale wheels?
11 votes

Ever since this question was asked I wanted to build something that would fit that scale. Here's the result: I know this is not using only LEGO pieces but, I thought that there was no way to make ...

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Tools to aid in getting parts from tight spots?
11 votes

I use a simple reverse tape at the end of a stick

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What is the largest single LEGO piece?
11 votes

If you go by Volume/Weight. This is heaviest single-element I've ever seen. It's not just plastic but it's one element made and sold by LEGO.

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How can I build a functional gearbox?
9 votes

Funny that you are asking because I just rebuilt my old 4x4 OffRoader (8466) with my son. it's a 4 wheels drive, V8 with a functional 5 speed gearbox (including reverse). and in the truck (with the ...

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Quick way to inventory parts
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8 votes

As you have probably guessed by now, there is no easy solution to your question. It all comes down to computer vision. In this solution, Akiyuki built a massive machine out of LEGO bricks, a camera, ...

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What is the purpose of the Technic Axle 6 in set 6847?
8 votes

When weight is applied on the structure, the wheels are are creating a twisting motion that will eventually dissasemble the 1x6 beams. With the extra structural part when a load is applied there is a ...

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What material is used to make capes and cloth in LEGO sets and where do I get it?
8 votes

The term acrylic is used for many mediums, like acrylic paint (liquid), acrylic fiber (clothing), acrylic rubber (flexible) and acrylic glass (really hard). So, as you see, it is possible to make ...

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Are there more studs or "antistuds"?
8 votes

It seems like the studs have an advantage and here's two reasons why: 1) The base plates have only studs and no antistuds. So many base plates were made that this is stacking the numbers in favor of ...

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