3D Printed Pre-Motor Filter Adapter for Generic Filters
If you own this vacuum, you already know the biggest pain point: replacement accessories can be expensive and hard to find. The pre-motor filter (model `VCA-RAK97`) is one of the most difficult and costly parts to replace. It is sold as “washable,” but in real use it is not easy to clean thoroughly, it can be damaged during cleaning, and it takes time to dry before the vacuum can be used again.
Because this filter is unique to this model, I designed a 3D printed adapter that lets the vacuum use a cheap, off-the-shelf generic replacement filter.
This project started as a practical fix for a real everyday problem: high filter cost and limited availability. My goal was to create a simple drop-in adapter so maintenance is easier, cheaper, and less frustrating.
How the Adapter Works?
- Remove the rubber gasket from the original Samsung filter. It is not glued, so it comes off fairly easily. Be careful around the small rubber strips near the plastic tabs.
- Install that original rubber gasket into the printed adapter frame. The frame is designed to accept the gasket and fit like a direct replacement.
- Insert the generic filter into the holder section. The holder has a snug fit and includes a tab slot so the filter can be removed quickly.
The adapter is made of two printed parts:
- A frame that accepts the original rubber gasket
- A filter holder with a pull-tab slot for easy replacement
Choosing the replacement filter was the hardest part of this project. The original filter is roughly:
- 165 mm long
- 50 mm wide
- 8 mm thick
I tested a generic filter commonly sold for the Mijia G1 (also listed for other robot vacuums). It is slightly shorter and narrower than the original, but it appears less dense and allows good airflow for this design.
It took about 4-5 design iterations to get the fit and function right. I have now used this adapter through multiple cleaning cycles without issues. Instead of washing and waiting for filters to dry, I can just replace them and continue.
I want to be very clear: this project is not about profit. The price for the STL files is symbolic and meant as appreciation for the time spent designing, prototyping, printing, and testing many versions. If this adapter helps you, your support is appreciated and helps me continue sharing practical solutions like this.
Copyright © 2026. All rights reserved.
The adapter design files (including STL files), photos, and this write-up are my original work. I do not allow redistribution, re-uploading, sharing, bundling, resale, or commercial/non-commercial distribution of these files for any reason, with or without modification, unless I provide explicit written permission.
