Mini Wheel Sanding Disc for Rotary Tool (20mm & 30mm)
A simple and practical mini sanding disc designed for rotary tools and DIY projects. This model is available in two sizes: 20mm and 30mm, making it suitable for detail sanding, edge finishing, polishing preparation, and working in tight spaces.
The design is optimized for use with a 2.35mm shank mandrel, which is commonly used on mini rotary tools and hobby grinders.
Required Parts
To assemble this sanding disc, you will need:
- 1x Printed sanding disc body (20mm or 30mm version)
- 1x 2.35mm shank mandrel / rotary tool arbor
- EVA foam, craft foam, or similar soft backing material (recommended 2–5 mm thickness)
- Sandpaper (recommended: self-adhesive or attached with double-sided tape)
- Super glue, contact adhesive, or double-sided tape
Why Use Foam?
Adding a thin layer of EVA foam or other soft foam between the printed disc and the sandpaper creates a cushioned backing pad. This helps:
- Improve surface conformity on curved parts
- Reduce vibration during sanding
- Prevent the sanding surface from being overly rigid
- Produce a smoother and more consistent finish
Compatible Tools
- Mini rotary tools
- Dremel-style tools
- Hobby grinders
- Other rotary tools using 2.35mm shank accessories
Printing Recommendations
- Layer Height: 0.20 mm
- Infill: 15–30%
- Supports: Not required
- Material: PLA, PETG, or ABS
Assembly
- Print the desired disc size.
- Insert the 2.35mm mandrel into the center hole.
- Secure it if necessary.
- Cut EVA foam to match the disc diameter and attach it to the printed disc.
- Cut sandpaper to size and attach it to the foam layer.
Lubrison
