210.080.0218.8
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Interactive 3D model of 4-Servo Robotic Arm

Mechanical parts

4-Servo Robotic Arm

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Bounding box
80.0 × 210.0 × 218.8 mm
Engine
Precision B-rep
Parameters
27
Published
November 2, 2026

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The prompt

CAD me robotic arm that uses 4 MG90 servo motors for movement. Also a base at the bottom to put all the wiring

Parameters

NameValueRange
Base Width80 mm40 – 150
Base Depth80 mm40 – 150
Base Height30 mm10 – 80
Base Wall Thickness4 mm2 – 10
Servo Length22.8 mm15 – 40
Servo Width12.2 mm8 – 25
Servo Height28.5 mm15 – 50
Servo Shaft Radius2.4 mm1 – 4
Servo Shaft Length8 mm3 – 15
Turntable Diameter60 mm30 – 100
Turntable Thickness10 mm5 – 20
Turntable Shaft Clearance0.5 mm0.1 – 2
Shoulder Bracket Width40 mm20 – 80
Shoulder Bracket Depth20 mm10 – 60
Shoulder Bracket Height30 mm15 – 60
Shoulder Bracket Wall Thickness4 mm2 – 8
Upper Arm Length100 mm50 – 200
Upper Arm Square Side20 mm10 – 40
Forearm Length100 mm50 – 200
Forearm Square Side20 mm10 – 40
Elbow Bracket Width40 mm20 – 80
Elbow Bracket Depth20 mm10 – 60
Elbow Bracket Height30 mm15 – 60
Elbow Bracket Wall Thickness4 mm2 – 8
Gripper Length60 mm30 – 120
Gripper Width25 mm15 – 50
Gripper Height25 mm15 – 50

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.

4-Servo Robotic Arm - Free CAD Model (STEP, STL) | TextoCAD