Select Part Type Part Type:

Select the type of part you want to generate.

LEGO® is a trademark of the LEGO Group. This tool is not affiliated with or endorsed by the LEGO Group. Dimensions & complex profiles are approximations and require print calibration.

Part Parameters

Length (in Studs):

5units

Beam Type: Corner Radius:

2.0mm

Use Axle Holes (+) at Ends

Beam Dims: ? L x ? W x ? H

Length (in Studs):

4units

Axle Dims: ? L x ? Ø

Standard Friction Peg (Type 2).

Peg Dims: ~15.8 L x ~6.2 Ø (max)

Number of Teeth:

Face Width:

Gear Dims: Pitch Ø:? / Outer Ø:? / Width:?

Standard Technic Half-Bush.

Dims: ~4.0mm L x ~7.8mm Ø (Flange)

Standard 1x2 Brick with 2 Holes.

Dims: 16mm L x 8mm W x 9.6mm H

Number of Teeth:

Face Width:

Approx Outer Ø: ? mm

Note: Simplified 45° cone angle approx.

Simplified standard Differential Housing.

Approx Dims: ~24mm L x ~24mm W x ~16mm H

Number of Teeth:

Outer Radius:

15.0mm

Hub Radius:

10.0mm

Hole Type: Face Width:

7.8mm

Tooth Width Ratio:

0.50

Outer Dia: ?, Hub Dia: ?, Hole: ?, Width: ?

Generates a gear with simple rectangular teeth.

Appearance Part Color:

Export Model

Export the generated part model.

(.GLB recommended for colors)

Note: Ensure your 3D printer is calibrated for precise fits with official parts.

SolvProb — Custom Website & App Engineering

Technic-Style Part Customizer

Create customizable Technic-style 3D parts—beams, axles, gears, bricks, pegs, bushings, and more—and export OBJ or GLB models.

What this tool does

This browser-based 3D editor creates customizable Technic-style parts, including beams, axles, pegs, spur gears, bushings, bricks, bevel gears, differential housings, and simple gears.

Who this is for

Makers exploring custom brick-compatible mechanisms
Students learning parametric part and gear modeling
Designers who want a quick 3D concept before refining it in CAD software

How to use this tool

Select a part type from the available Technic-style options
Adjust the type-specific dimensions, holes, teeth, width, radius, or end settings
Choose a color and orbit the 3D preview to inspect the part
Download the current model as OBJ or binary GLB
Validate fit, dimensions, and printability in dedicated CAD software before use

Inputs

Inputs include the selected part type, dimensions such as length or radius, gear teeth and width where applicable, hole and axle options, corner or end settings, and a part color.

Outputs

The page renders a Three.js model and downloads the generated part as an OBJ or GLB file. The geometry is an approximate custom model, not an engineering-certified LEGO part or a guaranteed 3D-print-ready design.

Example use cases

Explore a custom beam, axle, peg, or gear arrangement
Create a visual concept for a compatible-style mechanism
Export a starting mesh for further CAD cleanup and fit testing

Explore more SolvProb tools

Frequently asked questions

Which part types can I create?

The selector includes Technic Beam, Axle, Peg, Spur Gear, Bushing, Technic Brick 1x2, Bevel Gear, Differential Housing, and Simple Gear.

What can I customize?

Available controls depend on the part and can include length, beam style, corner radius, axle ends, gear teeth, width, holes, radii, and color.

Which file formats export?

The editor downloads OBJ and binary GLB models.

Are compatibility and dimensions guaranteed?

No. Treat the result as an approximate custom model and validate dimensions, compatibility, and fabrication requirements before relying on it.

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