This is a sturdy, ergonomic 3D-printed hand sanding block designed to work with any strip of sandpaper you prefer. The system uses a simple two-piece clamp mechanism: insert the sandpaper around the main body, tighten the screws, and you’re ready to sand flat surfaces, edges, or tight corners with excellent control.

The model consists of two printable parts:

Main block

Clamp piece

Both parts are optimized for FFF printing and require no supports.

Perfect for workshop use, woodworking, metal finishing, or hobby projects.

Features

Two-piece clamping system using standard M3 hardware

Works with any cut-to-size sandpaper strip

Strong geometry for firm grip and stable sanding

Optional EVA foam layer for improved fit and pressure distribution

Source file (Fusion360) included for customization

Required Hardware

You will need the following common fasteners (not included):

2× M3 x 15 mm screws

2× M3 hex nuts

2× M3 washers

Optionally: EVA foam strip glued along the perimeter for a softer interface and better sandpaper conformity

Printing Recommendations

Material: PLA, ABS, or PETG

Layer height: 0.20–0.30 mm

Walls: 3 perimeters

Infill: 5–15%

Supports: Not required

Brim: Recommended when printing in ABS

The STL files for both parts and the editable Fusion360 file are included.

Hope you find it useful!

If you print it, please share a make!

Hand Sanding Block

0.2mm layer, 4 walls, 15% infill