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Set 42055 Bucket Wheel Excavator
Technic

Bucket Wheel Excavator

Bucket Wheel Excavator 42055 is a Technic model of the enormous mining machines used in open-pit excavation. At 3,929 pieces, this 2016 set ranks among the largest pure Technic models in the catalogue. Black, grey and blue tones combine to give the model an appropriately industrial, functional look.

Set number
42055
Year
2016
Pieces
3,929
Minifigures
0
Theme
Technic
Different parts
168
What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 168

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Spare parts (12)

These extra parts come with the set in case one gets lost.

Description

Built around working mechanisms

Technic sets of this scale are usually defined by moving functions rather than static shape alone. A bucket wheel excavator typically includes a rotating wheel, a movable boom arm and a tracked undercarriage, all linked together through gears and axles. With 3,929 pieces to work with, there is enough material to build these mechanical assemblies in real detail rather than settling for a simplified, non-functional shape. That combination of mechanics and structure is exactly what makes a build like this technically demanding.

A build for experienced Technic fans

Models of this size are generally aimed at more experienced builders, since balancing mechanics and structural stability takes more care than a simpler set. The real machine's long boom arms and heavy components mean the model needs a solid internal structure to stay stable once assembled. Anyone who has already worked through smaller Technic sets will find this a natural next step towards more complex, multi-stage mechanisms. Moving on to a model of this scale marks a clear step up from smaller, simpler Technic sets.

Black, grey and blue for an industrial feel

Black together with light and dark bluish grey forms the main structure, while blue is used as an accent colour on the cab and select details. That colour choice is typical of heavy machinery and deliberately avoids the brighter palettes seen on many other Technic vehicles. Checking the parts list on this page shows exactly how these colours are distributed across the undercarriage, boom and cab. That clear colour separation also makes it easier to tell the different assemblies apart while building.

168 unique parts, built for repetition

With 168 unique elements, the shape variety stays relatively contained given the overall piece count, which is common in Technic models built from many repeated struts and connectors. That repetition is exactly what gives the long boom arm its stability. Anyone planning their own Technic builds will find the full parts list on this page a useful reference for available beam lengths, angles and connector types. Understanding that repeated pattern is useful for anyone applying the same approach to their own stable builds.

FAQ

How many pieces does the Bucket Wheel Excavator 42055 have?
It has 3,929 pieces across 168 unique elements.
Does the model have moving functions?
Yes, Technic sets of this size typically include moving assemblies such as the boom, bucket wheel and undercarriage.
Who is this set suitable for?
Its size and mechanical complexity make it better suited to experienced Technic builders.

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