Free Engineering Downloads
Magnet CAD Models — STEP · STL · DXF · Drawings · Datasheets
Exact-geometry CAD, dimensioned drawings, and full datasheets for any disc, ring, or block magnet — sintered NdFeB, SmCo, Alnico, or ceramic ferrite — generated instantly in your browser. Drop the STEP into your assembly, then order the real part from 10M+ magnets stocked in the U.S.
Models are nominal geometry — no chamfers or coating thickness are represented. Add an optional general tolerance and it appears on every dimension of the PDF drawing and in its notes; the 3D files stay nominal. Standard tolerance is typically ±0.002"–±0.005"; see grades & tolerances. Geometry files carry no magnetic data: axially magnetized parts are magnetized through the thickness (Z axis of the model). STEP files are in millimetres per CAD convention regardless of input units.
About these CAD files
The STEP file is an exact boundary representation (ISO 10303-21, AP214 automotive_design schema) — true analytic cylinders and planes, not a faceted approximation — so mates, patterns, and interference checks in SolidWorks, Fusion 360, Creo, NX, CATIA, Onshape, or FreeCAD behave exactly as with vendor-supplied models. The STL is a fine mesh suitable for 3D-printed fit checks and fixture design. The DXF provides a two-view outline for import into your own drawing templates, and the PDF is a ready-to-share dimensioned two-view drawing sheet — border, title block, notes, and auto-selected standard scale — suitable for attaching to RFQs and design reviews. The one-page datasheet adds the full magnetic property table for the selected material and grade (Br, Hcb, Hcj, BHmax, max operating temperature), material-specific physical properties and engineering notes, calculated weight and pole-face surface field, and the dimensioned views — the document engineers file with the BOM.
Which sizes can I download?
Any size — the models are generated parametrically, so every stocked disc, ring, and block is covered, along with any custom size you're considering. For arc segments, spheres, and assemblies, contact our engineering team and we'll supply the model with your quote.
Do the models include magnetization direction?
CAD geometry formats carry no magnetic data, but you can select Axial or Diametric above (disc and ring shapes) and it's called out on the PDF drawing, datasheet, and DXF text, with a pole-direction arrow shown on the drawing and 3D preview. By convention axial parts are magnetized along the model's thickness axis; diametric parts are magnetized straight across the diameter, perpendicular to that axis. For true radial or multipole parts, note the direction on your drawing — our team reviews it at quote time.
Are the dimensions nominal or toleranced?
Nominal. Sintered NdFeB is ground to tolerance (typically ±0.002" to ±0.005" per dimension) and coated afterward; the model represents the nominal finished part. Put your critical tolerances on the drawing and we'll confirm capability — SPC data available.