手創兒童機械科學館 — LEGO RCX∕NXT∕EV3∕PF 樂高機器人

整理關於樂高積木的精確尺寸規格如下，若有需要可以參考看看。

Basic Brick Dimensions:

One Lego Unit = 7.88mm (8mm)
Brick height = 9.6mm (9.6mm)
Plate height = 3.18mm (3.2mm)

Stud diameter = 4.5mm (5mm)
Stud Height = 1.86mm (1.6mm)
Hollow Stud Inner Diameter = ?mm (3mm)
Pit Diameter = ?mm (not modelled)
Pit Depth = ?mm (not modelled)

Brick/Plate Wall Thickness = 1.6mm (1.5mm)
Brick Wall Depth = Varies (8.1mm)
Plate Wall Depth = 2.25mm (1.7mm)

Tube Inner Diameter = 5mm (5mm)
Tube Outer Diameter = 6.6mm (6.314mm from trigonometry)

Technic Parts:

Large Bushing Length = 7.7mm (8mm)
Small Bushing Length = 4mm (4mm)
Two Small Bushes with Teeth, Meshed = 7.1mm

The Technic Beam is not square in cross section:

Lengthwise across holes in beam: 0.308in (7.84mm)
Crossways to holes in beam: 0.293in (7.46mm)
Ratio: 1:1.05