CAD Library

25 Years of MAE 3

Spring 2025 Contest Table

This is an f3d file containing a complete CAD model of the contest table for this quarter's robot contest

f3d download

MAE 3 CAD RULES

Students must generate all CAD used for their robot, 3D printing and laser cutting except for the items on this website

Gears Tempates

These zip files contain pre-drawn gear files for various pitch sizes. The most common gear sizes for MAE 3 are 10, 12 and 16 pitch gears

DXF Download (upload into fusion in inches, or AutoCAD - dimensions are unitless)

f3d link (click open in fusion, the model is supposed to be empty in the browser, gear sets are hidden so you need to reveal them before copying to your design ) to use the f3d select your desired gear then copy and paste into a sketch object in a different workspace

Note: You will need to give extra room between the pitch diameters. If you align the pitch diameters to be perfectly tangent, it will cause interference issues in the teeth. You can and should rotate and move the gears to check proper placements

Gear generator

If you need a gear size that isn't on the template above, you can use this Gear generator

The pitch module is a ratio between teeth number and pitch diameter, so for a gear with a diameter D and tooth number N, you'd want to use a module D/N.

Be mindful of units since this site makes gear with millimeter dimensions.

large gear teeth are stronger, and are less likely to skip. However for a small gear dimension you need smaller gear teeth since the minimum number of teeth in a gear is about 12.

Timing Belt Pulleys

These files contain various pulleys (AKA sprockets) for use with the robot kit timing belts

DXF Download (insert into fusion sketch, make sure your sketch is in mm or upload into AutoCAD)

f3d link(click open in fusion, the model is supposed to be empty in the browser) to use the f3d select your desired gear then copy and paste into a sketch object in a different workspace

If the templates above are not working, or if you would like a more specific size please visit this online timing pulley generator. Make sure to set the pulley size to XL, then specify the amount of teeth you would like on the pulley. only use with AutoCAD.

Gear Racks

These files contain all the rack templates for every gear set

DXF Download (upload into AutoCAD - dimensions are unitless)

f3d link (click open in fusion, the model is supposed to be empty in the browser) to use the f3d select your desired gear then copy and paste into a sketch object in a different workspace.

Large, High Speed Motor (Non-Geared)

This is an f3d file that can be downloaded and uploaded to Fusion 360

Large High Speed Motor Download

Large, High Speed Motor Mount template

This file contains the template for mounting this motor

Large High Speed Motor Mount Template Download

Geared Motor [1]

This file contains a parts file model of this motor and can be opened in Fusion 360

Geared Motor [1] Download

Geared Motor [2]

This file contains a parts file model of this motor and can be opened in Fusion 360

Geared Motor [2] Download

Geared Motor Mount Template

This file contains motor hole mounts for mounting on the shaft of the geared motors

Geared Motor Mount Template

Note: NEVER press fit onto a motor shaft. This template is good for Lasercamm-ing. 3D printers usually print holes slightly small, so sizes will need to be adjusted