High Capacity Webbing Strap Winder

Hi everyone! I’m excited to share this project with you.

One of my hobbies is playing beach volleyball, and for that we use woven boundary straps to mark the court lines. After long matches, we were always tired and still had to manually roll all the straps back up by hand.
 

That’s what inspired me to develop this hand-crank strap winder.

I had already seen a few strap winders online, but most of them either had a very limited storage capacity or required having a power drill nearby to operate them. On top of that, I wanted to challenge myself and see if I could design something that truly met my own needs.

This version can easily store more than 16 meters of webbing strap without any issue. I designed it specifically for straps up to 50 mm wide (the size I personally use), but it also works perfectly with narrower straps.
 

So, after 3 prototype versions, I’m happy to present the fully functional final version.

I intentionally designed most of the assembly with generous tolerances to ensure smooth movement and easy fitting of all the parts. The small cover that hides the clamp shaft ended up slightly loose, but since this area is naturally held while using the winder, it hasn’t caused any problems during use.

If you feel it’s necessary, you can apply a small amount of glue to secure the cover permanently. Just keep in mind that doing so will prevent future disassembly of the clamp. Also, be careful not to glue any rotating parts!
 

Key Features:

• Eight-Part Design: The model consists of eight separate parts, allowing for multi-color printing and easier replacement in case any component breaks over time.
• Large Strap Capacity: Designed to comfortably handle long webbing straps without becoming bulky or difficult to use.
• Smooth Mechanical Movement: Optimized tolerances for reliable assembly and satisfying operation.

Recommended Print Settings:

To achieve the best results, here’s what I used for my final prototype:

• Wall Loops: 3 perimeters.
• Layer Height: 0.16 mm (Recommended) or 0.2 mm for a faster print.
• Infill: 10% Gyroid.
• Support: Designed to be Support-Free.
• Material: Works great in PLA, but PETG or ASA are highly recommended. These materials offer better flexibility for the parts, ensuring they can bend and snap into place securely without becoming brittle over time.

Assembly Guide: Need help assembling it? Check out the GIF below to see exactly how the parts fit together. It’s quick and easy!

Usage Guide: Need help understanding how it works? Check out the GIF below for a simple step-by-step demonstration of how to use the fully assembled setup.

Support my Work!

If you enjoyed this design and also love playing beach volleyball, please consider:

• Following my profile for more mechanical and everyday-use projects coming soon!
• Giving it a Boost 🚀 – It helps me continue creating and sharing high-quality original models with the community.

Hardware components can be found in the Bill of Materials section for your convenience.

Thank you for your support and happy printing!