Legos Robotic-Compatible Gear Rack & Pinion Set - Free 3D Print Model

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Logicators126

Hobby & DIY>Robotics

IP Report

Print Profile(1)

All

P1S

A1 mini

H2C

H2D

X1 Carbon

X1E

P2S

P1P

H2D Pro

H2S

X2D

A2L

0.2mm layer, 2 walls, 15% infill

Designer

2.7 h

1 plate

4.0(3)

Open in Bambu Studio

Boost

147

378

220

Released

Description

LEGOs-Compatible Gear Rack & Pinion Set

This model is a custom gear rack and gear set designed for LEGOz-style robotics and mechanical builds. It works great for creating linear motion systems such as sliding mechanisms, robot arms, elevators, or rack-and-pinion steering.

The racks include Technic-style pin holes so they can easily connect with beams, frames, and motors. The tooth profile is designed to mesh smoothly with standard gears for reliable motion.

Features:
• LEGOs-compatible pin holes
• Long gear racks for extended travel
• Smooth tooth profile for reliable gear meshing
• Perfect for robotics, engineering projects, and mechanical builds

Included Parts:
• Multiple rack lengths
• Matching gear pieces
• Optimized for 3D printing

Printing Tips:
• No supports required
• Print flat on the build plate
• 0.2 mm layer height recommended
• PLA or PETG works great

This set is great for robotics projects, STEM learning, and custom mechanical creations.

Comment & Rating (11)

@Garrett6777

qeustion, can you make the like sleeve the gear rack sits in, il look up the part number here in a bit, the part number is 18940, if you need to see the part look up that number on bricklink.com

(Edited)

The designer has replied

@Logicators126

Yes! In fact I am working on it right now someone previously msgd me about that.

@Garrett6777

Replying to @Logicators126 :

thanks!

@Logicators126

Replying to @Garrett6777 :

your welcome

@DA_CRAZY_CAT

please don't use ai for pics

@user_2587283548

Print Profile

0.2mm layer, 2 walls, 15% infill

(Edited)

Bed Adhesion Issue:The pinion gears barely contact their bed on the first layer and fall off. Be careful using the the standard gold textured PEI sheet. I think the default (55c) bed temperature is a bit risky. 60c or even 65c could be better. Prints great using PETG as support interface and the gears run smoothly. Seperate the objects to allow the skip object feature. Turn on arachne to get the full shoulder detail on the pinion gear. Nice design