About

Hi - I’m Matthew: software engineer by day, 3D printing obsessive by night. Building things - printers, computers, software, motorcycles - is what I love, and by now I run a concerningly large fleet of heavily modded machines.

I created Partsmith because I was tired of hunting for quality mounts when building or upgrading printers - what you find online is a gamble on quality. A parametric part with real measured dimensions removes the uncertainty about what you’re getting, so I started building a catalog of them, and it turned into this.

Where the dimensions come from

Every device-specific model here is driven by a hardware database I maintain by hand. Hole patterns come from the vendor’s own CAD (STEP files) or dimensioned drawings - never eyeballed off a datasheet render, and never guessed. When a dimension isn’t verifiable, the database records it as unknown instead of guessing - the model simply goes without that feature rather than shipping something I can’t validate.

How models are validated

I test every mount I can on my own hardware before it ends up here. I can’t buy every mainboard in the catalog, so for devices I don’t own I check the model feature by feature against the vendor CAD instead, and I stay conservative on the things that vary between board revisions - under-PCB clearance and the plate margin around the board - so the widest range of real boards still fits.

All mating interfaces get physical test prints: the DIN-rail clip interface and the captured-fastener designs were approved only after validation prints passed on my own printers, and validations still open stay queued rather than assumed.

What has to pass before a model ships

It must print support-free in the orientation you download it - an automated gate checks this on every model, every change.
Its mesh must verify watertight.
Exports are nominal size. No hidden “compensation” baked into your file - shrinkage belongs in your filament profile, where you can measure it per spool.

What I won’t do

I don’t clone solved community designs. Where a proven part already exists - DIN-rail clips are the classic example - my models expose a plain bolt interface and link the original, with the author credited.

The deal

Browsing, live previews, and STL downloads are free. Down the road, STEP export (the re-editable CAD format) and commercial licensing will be paid - that’s what covers the compute. The pricing page lays out the whole plan before any of it is charged for.

Missing a board, PSU, or bracket you need? Tell me and I’ll look at adding it: hello@partsmith.dev.