Over the years the LEGO group has made a number of different springs, dampers and suspension components. The most widely known ones are the springs in the 731 series, such as the above mentioned 731c04 (Hard Spring) and its cousins 731c05 (Normal Spring) and 731c06 (Soft Spring), but there are other more specialized springs as well, such as 32181 (which ...
There is no official answer on this, as “purist” LEGO is a consensus, not a definition. That said, there are several examples of pieces LEGO doesn’t classify as a part that are used in MOCs, such as:
The pin used to keep bundles of 4 train tracks together.
This Technic hub piece was never originally intended for standalone use (it was part of a pin joiner) ...
Rebrickable has an option to compare set's main models and some of the B-models as well. However there is no inventory for second model for 8285 set available on Rebrickable. The best I could find is a LDraw file available on Eurobricks.
I've imported this file as a custom list on Rebrickable that could be used to compare with sets and MOCs. Imported file ...
The builder used Set #70124 - Chima Eagle Legend Beast as a template.
To see the online instructions for this set watch this HERE. The bird's head construction is on page 14 at 53 seconds in.
For a list and description of all parts used look HERE.
For further inspiration, check out creator Markus Buhler's alternate Griffen build plus his tutorial HERE.
That's Train Level Crossing Center Rail Cap Insert 2 x 14 x 2/3. Although as naming suggests it is 2/3 of a brick, so it must be two plates high.
Picture from Bricklink:
And here is a list of 6 sets it was part of.
Another Lego byproduct that gets reused from time to time are "sprues".
Some elements are moulded by having channels directing the plastic to the various part of the element. The remnant plastic in these channels is called the sprue (confusingly the channels themselves are called the sprue as well)
Some Lego elements are provided with a sprue still attached....
The two different number systems are:
Element ID: 6-7 digits, uniquely identifies a piece by shape and color
Part number: usually 4-5 digits, uniquely identifies a piece shape, stamped on many bricks
(Unfortunately an element ID is not simply a few numbers added onto a part number)
In LDD regular mode (not extended mode), you can search by both numbers. I ...
For non-commercial use, the parts library used by Rebrickable is fairly extensive. More importantly the images have a very consistent presentation.
If you already know the part ID you can replace the use the URL below to get a direct link to the image. Just replace the X with your part ID.
There are a few that I'm aware of.
Here's one from the 7208 Fire Station:
And another from the 7288 Mobile Police Unit:
This TV element from the 7639 Camper may also work for you:
These are all very affordable on Bricklink. Note that they are stickered parts. I'm not aware of printed parts with this pattern, but perhaps someone else here knows of some.
You might be able to get the information that you are after from the Rebrickable database dumps. This includes set inventories for many sets, along with the year that the sets were released. Here's the full schema diagram:
A query something like this should provide a count of the number of sets every element has appeared in by year:
Perhaps this Eurobricks thread is helpful: https://www.eurobricks.com/forum/index.php?/forums/topic/108739-new-parts-for-lgeo-library/
It seems that the lgeo library itself is no longer maintained but this person maintains his own version. The download links are on the first page...
As stated in your "various places" link, the LDraw.org web site maintains an All-In-One-Installer (AIOI) which contains and installs LGEO and is updated in January every year so I assume they use the latest version of LGEO.
BTW, I found an LGEO quirk when launching POV-Ray from within LPub3D which I use for generating building instructions. I kept the ...
The "realest" of the real part count for any piece is always located somewhere in the back of the instruction booklet piece manifest.
Look at middle row last piece bottom, where it says we're gonna need 108x 6014648.
Wow, this thing looks cool! Have fun!!
LEGO instructions - Technic - 42069 - Extreme Adventure (Model 1) by LEGO instructions -...
The trend I found on Bricklink is a news icon graphic with an image of a lined globe and the letters "TV".
This is the earliest set that has multiple iconography with this Globe TV theme.
This theme evolves in later sets to TV 6+ News Channel/Station still sporting a lined Globe.
Here is a set with this modification on that TV6 theme.
I was unable to find any sites with a decent database of images in the file format you are looking for. I don't know what your experience is with image formats or what type of related editing software you may have access to that could help you obtain them yourself.
If the list of parts isn't extensive then manually converting them is an option if you have ...
If you have added your sets to Brickset, under "My Sets; Minifigs; View Your Minifigs" you will find all your minifigs pictured & listed by name (default). This will give you their name, ID number, and which set or sets they are from. You also have several more options to sort them by. Clicking on a picture magnify's the figure for greater detail. All of ...
This is now available on Github.
I was able to find a working download of just the original LGEO library on Eurobricks thanks to some help from the other answerers. I trimmed that down a bit, as that download required integrating some other files in order to work properly. This repo should now work perfectly on its own, but it only includes parts up through ...