Neodymium disc magnets, common sizes — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/neodymium-disc-magnets/  (CC BY 4.0)
Basis: standard disc sizes; nominal, N35–N52 share dimensions
Catalog version: 2026-10-20

Sizes: see table below
- Common sizes: Ø6 × 3, Ø8 × 3, Ø10 × 3, Ø12 × 3, Ø5 × 2, Ø3 × 1 mm (tolerance about ±0.1 mm).
- Press-fit pocket: diameter + 0.1–0.2 mm, depth = thickness; glue-in: diameter + 0.4 mm. A 0.5 mm floor between magnet and the mating part keeps pull strong and the surface smooth.
- Polarity: mark north on the pair before gluing.

size  dia_mm  thick_mm  press_fit_hole_mm  glue_hole_mm
3x1  3  1  3.15  3.4
5x2  5  2  5.15  5.4
6x3  6  3  6.15  6.4
8x3  8  3  8.15  8.4
10x3  10  3  10.2  10.4
12x3  12  3  12.2  12.4

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- McMaster-Carr: Magnets (free STEP/IGES/STL per part, for your own design use; no redistribution) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/magnets/
- Wikipedia: Neodymium magnet — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Neodymium_magnet

Free files (CC BY 4.0, Xem Studio; STEP + STL, 6 parts): https://xemstudio.com/files/hardware/neodymium-disc-magnets/index.json
API: https://xemstudio.com/api/geometry?object=neodymium-disc-magnets