Chain Guard

This is a chain/gear guard to protect a winch on a robot. We had issues where other robots would pull the chain off, causing us to loose potential points and we wanted to make sure that incidents like those did not happen again.

The extrusion near the end is because I did not have many photos, or dimensions to model around. I needed to screw the plate into a motor mount, so I made that solid so I could drill the correct holes upon mounting the guard.

The hole in the front is designed for a 1/2" hex bearing from Andymark.

The largest sprocket that this can fit is a 3.4in sprocket with #25 chain.

I uploaded a STEP file if you want to download and see correct dimensions.

*Please note that this was designed for a custom winch and therefore, probably will not work with your design. This is uploaded as it is a model that we will use on our robot, and we wanted to open source our 3D printable designs. You may modify the file, take any inspirations, etc. for your use case and design, that's why the STEP file is uploaded for correct dimensions. We only ask that you thank us if you use our designs in any way, and we'd love to meet you all if you we're at competitions together!*

Designed for the FRC Team 5347 "The Gryphons".

Print Settings

Printer Brand:

Prusa

Printer:

Rafts:

No

Supports:

Resolution:

.3mm

Infill:

Notes:

I sliced the model in Simplify3D and used 2 processes:

1st one: 10% infill, 2 shells, until the walls started, then cap it, and start a new process.

2nd: 0% infill, 4 shells, and continue the model

I did this since I wanted a strong model. I was over extruding when I tried an infill in the walls, so I just used shells instead to reinforce the 4mm wall.

This is made for perfect dimensional accuracy. So adjust the scaling for your printer!

Category: Robotics