Questions asking for information about a known LEGO element/brick. Use the [Identification] tag for questions about unknown pieces or sets.

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8
votes
3answers
3k views

How accurate is the ultrasound sensor when moving?

Can I use an ultrasound sensor while the Robot is moving, or will it give bad data?
2
votes
2answers
630 views

What's a good base collection of tiles?

I recently picked up a copy of the LEGO ideas book, and been inspired. As a novice builder, I've noticed that almost every model makes use of tiles to provide a finished look, which seems like a great ...
3
votes
1answer
150 views

Are there any LEGO elements not being produced because of mechanical problem with the mould?

I am referring element number 702 4x4 corner brick, and possibly other elements that have not been in sets in a considerable amount of time.
0
votes
1answer
105 views

How quickly do new molds reach PAB on the Lego website?

A few months ago, I asked Lego customer service if the 1x2 jumper plates on the Lego PAB site would be the new mould (with stud holders) or the old mould (with pegs). I received no reply, not even to ...
7
votes
2answers
306 views

Parts in Lego Set

I am building an inventory of all my Lego pieces and I am looking for a website that can give the pieces in a set with only the set number. It would be easier if there was information for many Lego ...
1
vote
0answers
80 views

What do factory markings on the inside of DUPLO pieces mean?

In addition to LEGO and DUPLO names embossed inside the pieces of early DUPLO figures, there are a variety of number formats (one to three digits, some hyphenated) and in the case of 1977, the year. ...
2
votes
1answer
206 views

I have a 16x16 stud clear base plate. Where is it from?

I found another grab bag treasure. I ended up with a 16x16 stud clear(ish) base plate. A quick look at bricklink gave me a no items found message. I'd like to know which set(s) this piece can be found ...
6
votes
1answer
209 views

Why are 2/3 height bricks with studs on the side 2 studs deep?

This question is regarding the 2/3 height bricks with studs on the side. The two that I am aware of are 99206 and 87609: If you haven't seen them before, these are functionally somewhat similar to ...
4
votes
2answers
222 views

Help identifying Lego Set from bags!

I visited Toyrus in Paris recently and bought several lego sets for my son. Mostly, Star Wars sets. In each case, we brought the manuals and the cardboard boxes so that he could assemble them. ...
5
votes
2answers
202 views

Personal part collection on the web (Bricklink or alternative)

I started using Brinklink a few months ago and although I really like it the interface is terrible. I am looking for a specific feature but don't know if it's unsupported or just I cannot find it. ...
11
votes
4answers
3k views

What is the rarest LEGO production element (colour/shape combination)?

What is the rarest LEGO element according to the following criteria: Genuine LEGO elements, not those available through third party vendors or otherwise modified elements. (So nothing from ...
8
votes
2answers
912 views

How is the LEGO plastic different from Megablok plastic?

It's obvious that LEGO has better quality control, but what about the plastic they use? Megabloks look cheap and the parts seem to vary in color in a side by side comparison next to LEGO brand ...
5
votes
1answer
227 views

Are these ATC bricks from the 1970's LEGO?

I have some Lego compatible basic bricks from early 1970s or late 1960s. Bought in Finland or maybe Germany or Sweden. Can anyone tell me more about them? As you can see, the interlocking mechanism ...
1
vote
1answer
237 views

When and why were pieces 3651 and 3652 discontinued?

Bricklink has piece 3651 as Axle and Pin Connector, while piece 3652 is Engine Piston Square 2x2. You could attach them to each other to form a piston. Service pack 5260, Connecting Rods and Stop ...
12
votes
3answers
360 views

How to find out if an element is out of production

Is there a way to know if Lego has officially stopped making a certain Lego element? As an example, from the 580 Lego set, I haven't seen this conveyor belt (along with those wheels and the ...
14
votes
10answers
2k views

What pieces are prone to breaking?

I've had a few pieces break over the years, which was a real bummer as I was not expecting them to. What are some commonly used pieces that are prone to breaking? Pieces that should be handled ...
17
votes
4answers
18k views

What are the dimensions of a LEGO brick?

What are the real world dimensions of bricks? (starting with 1x1 brick) Plates? Studs? Does LEGO think of this in metric or imperial units or something else?
11
votes
0answers
327 views

What's the exact opacity and translucency of transparent bricks?

As answered in this question, transparent bricks are made of PC (polycarbonate) and as listed in this answer and on Brickipedia there are fourteen transparent colors: 40 Transparent (clear) 41 ...
20
votes
5answers
4k views

What is the largest single LEGO piece?

What is the largest single LEGO piece ever produced? This does not include LEGO affiliates like Duplo. Clarifications It must be a purchasable block. By largest, I mean largest by Volume/Weight of ...
6
votes
1answer
248 views

How many styles of element separators has LEGO produced?

I used to use other LEGO elements to separate tightly bound pieces in my collection. My thumb nail and I were quite pleased when I first discovered an actual brick separator LEGO introduced to ease ...
2
votes
0answers
32 views

piece information [duplicate]

I found a lego item that I can not fiugre out what it is or what set it goes with. I was hoping someone out there could give me some info on the item. I'm attaching a picture of the item in question. ...
5
votes
2answers
249 views

Does the jumper plate have a Danish nickname?

Does the "jumper plate" (1×2 plate with centered stud) have a Danish nickname like the "Erling"? Who is the designer of this part? And does there exist a catalog of designers of specific bricks?
5
votes
1answer
250 views

Will using a bright LED to light my MOC harm my LEGO?

I'm building a LEGO model and planning on lighting it with a bank of 5 battery operated LEDs. I know sunlight negatively affects several LEGO colors. Will a bright LED harm the elements in my MOC the ...
17
votes
2answers
924 views

Why are LEGO slope bricks textured?

Why is the slope part of bricks textured instead of the usual flat & glossy edge? Are there any non-textured forms of these bricks?
2
votes
2answers
231 views

Where did “Cheese Slope” get its name?

Why is this piece called a "cheese slope"? "Slope" I get; but "cheese"?
9
votes
1answer
753 views

What are all the different ways that LEGO pieces join together?

Has anyone made a list of all of the different types of connections between LEGO bricks? Obviously there's the stud connection - but there's also the ball and socket joint, the more recent ...
3
votes
1answer
179 views

Are both these slope designs genuine Lego?

Are both of these slope designs genuine? I am reasonably certain that this is just a mold change at some point, but it doesn't hurt to ask. I also have two textured types in dark blue, and one ...
6
votes
2answers
200 views

Which “Real World” Company was the first to have its' name featured in an actual (numbered) Lego set?

Excluding the Lego company, which "Real World" Company was the first to have its' name featured in an actual Lego set?
4
votes
1answer
245 views

How to build a car that stops at a certain distance?

I want to build a small car that is about 200 grams. I want it to run the following course and stop at exactly or about the the finish line. I can't use any controlling devices or electronics. I've ...
6
votes
2answers
273 views

Are those bowls genuine LEGO pieces?

I've been sieving through my video collection and came across a video from 2011. It's part of a series of Ninjago videos giving you tips on fun things you could do with the Spinners. At the end of the ...
2
votes
1answer
266 views

How to efficiently identify bricks and their names? [duplicate]

I've found http://rebrickable.com/myparts linked in one of the answers here on this site and I'd like to list all of the parts I have at home (probably a thousand or two). The problem is, there is a ...
4
votes
1answer
177 views

Why 2M Cross Axle has Groove?

I was sorting axles noticed only 2M has grooves. Why 2M Cross Axle has grooves? Is it for alignment?
3
votes
2answers
273 views

Common, practical use for this piece

I've been digging to some old inventories and noticed that all Bohrok from the Bionicle theme contains this piece: I'm pretty sure I have this piece in my collection, probably from a Bohrok. At ...
7
votes
2answers
2k views

How does LEGO handle the breakage of Hero Factory sockets?

My son has a slowly growing collection of Hero Factory figures, and they have accumulated a consistent problem: socket connector cracking. The tips of the angular part of the limb which connects to a ...
3
votes
1answer
225 views

How many standard 2x4 LEGO elements are produced in a single 2x4 mold injection?

Just how many standard 2x4 LEGO elements are produced from a single mold injection? I realize the molds are used over and over again, but how many bricks does a 2x4 element mold produce at a time?
4
votes
1answer
257 views

What is the purpose of the hole in the 12 x 12 boat bow (6051)?

I recently received Renegade Runner (6268), and I noticed that it has a somewhat awkward hole in the bow: The main bow piece has a hole for some reason, but I'm not sure what it is for. Here's the ...
4
votes
1answer
201 views

Why does the pin recess on the Technic turntable continue to the edge of the part?

Here's the part in question (2955): While Technic parts typically have a recess to allow the ends of pins to be flush with the surface, this part (and perhaps others) carry this recess all the way ...
9
votes
3answers
344 views

Any reasons for the introduction of the new-style raised arch?

The new-style raised arch (to the left, 92950) got introduced in 2009, and has been gradually replacing the old-style arch (to the right, 3455) across the board. However, after four years, not only ...
6
votes
1answer
335 views

What is the true angle of a cheese slope?

What is the true angle of a cheese slope? Bricklink lists it as "Slope 30 1 x 1 x 2/3" while LDraw and Peeron list it as "Slope Brick 31 1 x 1 x 2/3". Why do these sources disagree, and what is the ...
7
votes
2answers
983 views

Why does Lego restrict the number of colors per shape?

There are many shapes and many colors of Lego elements. Some color/shapes are rare and hard to find. Why does Lego restrict the number of colors available per shape?
7
votes
1answer
711 views

Why was the 1x1 round brick changed?

The first 1x1 round bricks had no lip, just like most bricks: Brick, Round 1 x 1 Old - No Bottom Lip A lip was then added: Brick, Round 1 x 1 Solid Stud Why? Later, a hole was added in the ...
7
votes
1answer
251 views

Can I take an old LEGO winch apart?

I have an old LEGO winch that looks like #73037 It has been "restrung" but it is very stiff and it looks like it has some of the old string stuck between the rotating and non-rotating parts. It ...
1
vote
1answer
293 views

Easy way to get the weight of a Bricklink order

Is there an easy way to estimate, to the nearest 100 g (or so) the weight of a shopping cart in Bricklink so that I can estimate the shipping charge (sellers may quote ranges such as "250 - 500 g: $X, ...
13
votes
2answers
2k views

Why does LEGO now use studless technic designs?

It seems to me that sometime between 1998 and 2006 (between the Mindstorms RCX and NXT), LEGO switched from using studded technic bricks (like this:) to studdless beams (like this): In my ...
5
votes
1answer
215 views

Electric, Plug Holder 4.5V/12V what is it for?

I have seen the Electric, Plug Holder 4.5V/12V on bricklink a few times and have often wondered what it is for. According to Bricklink, it was only ever produced in Light Gray and appeared in 3 ...
0
votes
3answers
935 views

Why do new LEGO bricks feel softer than old bricks?

The older bricks that were made back in the day, "pre-2K", seemed to be made out of a harder more durable brick that seemed to hurt your feet when you walked on them. Now it seems that since the other ...
17
votes
5answers
3k views

What is the smallest LEGO component?

When I purchase bulk LEGO bricks, one of the first things I do is to tip the whole lot into a mesh bag and give them a good soak in the bath (of course, I remove all the electrical bits etc. first). ...
8
votes
1answer
789 views

What are the angles used in angle connectors and liftarms?

LEGO makes Technic Angle Connectors, like these: (Here are names and part numbers). They also make angular liftarms, like these: (part 32348). That last part has an angle of 53.5 degrees. ...
7
votes
4answers
819 views

does Lego make bricks with a stone, brick or concrete block design?

Does Lego make the bricks with a stone, brick or concrete block finish on the sides? I would like to use these for walls and buildings on a train layout. Thanks!
4
votes
1answer
197 views

Is there a list of colours currently in production?

Is there a list anywhere of colours currently being used by Lego for new sets? There seem to be lots of comprehensive lists of all colours released ever, but few that relate to in-use colours, for ...