# PCB card guide (simplified)

A simplified PCB card guide or board retaining clip for assemblies, boards 1 to 2.4 mm thick, any length.

## Geometry

An 8 mm wide, 6 mm high bar along X, centred on the origin, its base on the XY plane, with a board slot along its
top from 1.8 mm above the base, as wide as the board plus 0.3 mm:

- **guide**: the slot runs the full length;
- **retain-clip**: the slot stops 1 mm short of the +X end, where an end lip (2 mm along X, from the slot floor up to
  6.6 mm) stands, overhanging the end by 1 mm.

| Board | 1 | 1.2 | 1.6 | 2 | 2.4 |
|---|---|---|---|---|---|
| Slot width | 1.3 | 1.5 | 1.9 | 2.3 | 2.7 |

## Parameters

| Parameter | Meaning |
|---|---|
| `kind` | `guide` or `retain-clip` |
| `board` | board thickness, mm |
| `length` | mm (the clip's lip adds 1 mm) |
| `material` | `unspecified` (no material assigned), `nylon` (PA6), `pom` |

## Sources

No standard covers these generic guides and they name no maker. **The geometry was measured from the published
reference models** below (every planar face read; the same body for every board and length), and every preset is
checked against its own model: bounding box within 0.05 mm and volume within 2 %.

- **step.parts**, `pcb_card_guide_board<t>mm_l<length>` and `pcb_board_retain_clip_board<t>mm_l<length>`
  (https://www.step.parts, repository https://github.com/earthtojake/step.parts, commit c6113328, `catalog/step/`):
  step.parts' own "analytic simplified" models, original project material under the repository's **MIT** licence
  (© 2026 earthtojake). They name no material, so the presets have `material = "unspecified"`.

Simplifications (the models'): square-edged bar, no lead-in chamfer at the slot, no mounting holes or snap pegs, the
clip's lip a plain block.

Preset list: from the step.parts catalogue (MIT), see `library/NOTICE.md`.