LEGO Technic 42055 Bucket Wheel Excavator

LEGO Technic set 42055, “Bucket Wheel Excavator,” represents a bucket wheel excavator, an industrial machine designed for continuous material extraction. Released in 2016, it belongs to the Technic theme and contains 3929 pieces.

The model depicts a large industrial excavator with a bucket wheel and an associated conveying structure. Within the Technic theme, it sits among construction and mining machinery, emphasizing visible mechanisms and functional layout rather than character based play.

The build uses Technic beams, axles, gears and structural connectors on a substantial scale. Its most recognizable features are the bucket wheel and conveyor system, which reflect the continuous handling process of the real machine type.

This set is suited to builders who want a large mechanical model for display and careful operation. Among Technic sets, it is best understood as a specialized industrial machine, valued for its structure, motion transfer and the way its functions are integrated into a coherent working layout.

Inventory of set 42055

The inventory of set 42055 lists 3,929 pieces, spare parts excluded: 168 different lots (one shape in one color) for 145 part shapes. The box also contains 52 spare parts, for small elements that are easy to lose.

Colors of set 42055

Main color: black, making up 26% of the parts, followed by light bluish gray (20%) and dark bluish gray (19%).

Part types

Most common parts in set 42055

139 of the 145 part shapes in this set have their own page on Setopedia, with their colors, element numbers and the other sets that use them. See all LEGO parts

Exclusive parts in set 42055

One part shape in set 42055 appears in no other set in the catalog, most often a printed element, a sticker or a mold specific to the model. If it gets lost, you will need to look for it individually, for example on BrickLink, rather than in another set. Counting colors, 2 lots in the set are not found in any other set.

Rebuilding set 42055 from another set

Share of the parts of set 42055 found in each of these similarly sized sets, counting shape, colour and quantity:

No similarly sized set goes above 51%: the model relies on a little-shared assortment, most of which has to be gathered piece by piece.

Size of set 42055 within its line

With 3,929 pieces, set 42055 ranks #4 out of 443 Technic sets in our database, which have an average of 658 parts. Among the 459 sets released in 2016, it ranks #6. That is 6 times the average Technic set size.