Free Mechanical 3D Models

Machined parts, gears, ball bearings, stepper motors and other mechanical components. Every file here is public domain: open it in your browser, then download it and use it for anything.

3503 3D parts · STEP, STL, SketchUp, 3MF, OBJ, glTF, IFC, Rhino and more · public domain

All 3503 Furniture & interiors 867 Mechanical 328 People & figures 323 Architecture & BIM 287 Electronics & PCB 282 Art & decor 220 Lighting 208 Fasteners & hardware 200 Vehicles 167 Tools & jigs 162 Nature & terrain 147 Floor plans & site plans 6 Other 365

All mechanical Piping & HVAC 49 Test parts (NIST) 33 Screws & bolts 25 Gears & gearboxes 24 Motors 19 Bearings 19 Belts, pulleys & chains 16 Linear motion 11 Retaining rings & pins 9 Robots & engines 8 Extrusion & framing 6 Washers 6 Shaft collars 6 Shaft couplings 5 Nuts 4 Springs 4

328 3D parts in Mechanical · Clear all

jtRotate in 3D
NIST MTC box assembly (JT)
NIST MTC box assembly (JT): a JT (.jt) sample file from the Innerscene 3D Viewer's Samples menu. Source: NIST MBE PMI CAD models, https://www.nist.gov/ctl/smart-connected-systems-division/model-based-enterprise. License: US government work.
1.5 MBDetails & download
x_bRotate in 3D
NIST MTC box
NIST MTC box: a Parasolid (.x_b) sample file from the Innerscene 3D Viewer's Samples menu. Source: NIST MBE PMI CAD models, https://www.nist.gov/ctl/smart-connected-systems-division/model-based-enterprise. License: US government work.
488 KBDetails & download
x_bRotate in 3D
NIST test part FTC 06
NIST test part FTC 06: a Parasolid (.x_b) sample file from the Innerscene 3D Viewer's Samples menu. Source: NIST MBE PMI CAD models, https://www.nist.gov/ctl/smart-connected-systems-division/model-based-enterprise. License: US government work.
117 KBDetails & download
x_bRotate in 3D
NIST test part CTC 02
NIST test part CTC 02: a Parasolid (.x_b) sample file from the Innerscene 3D Viewer's Samples menu. Source: NIST MBE PMI CAD models, https://www.nist.gov/ctl/smart-connected-systems-division/model-based-enterprise. License: US government work.
373 KBDetails & download
fcstdRotate in 3D
Pillow block (parts, links, colours)
Pillow block (parts, links, colours): a FreeCAD (.fcstd) sample file from the Innerscene 3D Viewer's Samples menu. Source: Authored by Innerscene (public/samples/SOURCES.md). License: Innerscene.
18 KBDetails & download
sldprtRotate in 3D
NIST test part FTC 10
NIST test part FTC 10: a SolidWorks (.sldprt) sample file from the Innerscene 3D Viewer's Samples menu. Source: NIST MBE PMI CAD models, https://www.nist.gov/ctl/smart-connected-systems-division/model-based-enterprise. License: US government work.
955 KBDetails & download
sldprtRotate in 3D
NIST test part CTC 02
NIST test part CTC 02: a SolidWorks (.sldprt) sample file from the Innerscene 3D Viewer's Samples menu. Source: NIST MBE PMI CAD models, https://www.nist.gov/ctl/smart-connected-systems-division/model-based-enterprise. License: US government work.
1.2 MBDetails & download
sldasmRotate in 3D
NIST MTC box assembly
NIST MTC box assembly: a SolidWorks (.sldasm) sample file from the Innerscene 3D Viewer's Samples menu. Source: NIST MBE PMI CAD models, https://www.nist.gov/ctl/smart-connected-systems-division/model-based-enterprise. License: US government work.
2.1 MBDetails & download
nwdRotate in 3D
NIST MTC box assembly
NIST MTC box assembly: a Autodesk Navisworks (.nwd) sample file from the Innerscene 3D Viewer's Samples menu. Source: NIST MBE PMI geometry, written to this format by Innerscene (public/samples/SOURCES.md). License: US government work.
2.3 MBDetails & download
glbRotate in 3D
Thomas Elkins refrigerator patent model
Scan of the patent model for Thomas Elkins' 1879 refrigerating apparatus, from the National Museum of African American History and Culture. Provided as GLB; open it in the viewer to rotate it, or export it to STL, OBJ, FBX and other formats.
2.7 MB · by Smithsonian Institution (NMAAHC)Details & download
glbRotate in 3D
Davenport electric motor (US patent 132)
Scan of Thomas Davenport's 1837 patent model of an electric motor, US patent number 132. Provided as GLB; open it in the viewer to rotate it, or export it to STL, OBJ, FBX and other formats.
4.1 MB · by Smithsonian Institution (NMAH)Details & download
glbRotate in 3D
Abraham Lincoln's patent model
Scan of the model Abraham Lincoln submitted with his 1849 patent for buoying vessels over shoals, the only patent held by a US president. Provided as GLB; open it in the viewer to rotate it, or export it to STL, OBJ, FBX and other formats.
9.7 MB · by Smithsonian Institution (NMAH)Details & download
stepRotate in 3D
Machined test part NIST FTC-11 (STEP)
A realistic machined part from NIST's PMI CAD test models (Fully-Toleranced Test Case 11), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
7 KB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST FTC-10 (STEP)
A realistic machined part from NIST's PMI CAD test models (Fully-Toleranced Test Case 10), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
316 KB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST FTC-09 (STEP)
A realistic machined part from NIST's PMI CAD test models (Fully-Toleranced Test Case 9), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
258 KB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST FTC-08 (STEP)
A realistic machined part from NIST's PMI CAD test models (Fully-Toleranced Test Case 8), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
440 KB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST FTC-07 (STEP)
A realistic machined part from NIST's PMI CAD test models (Fully-Toleranced Test Case 7), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
393 KB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST FTC-06 (STEP)
A realistic machined part from NIST's PMI CAD test models (Fully-Toleranced Test Case 6), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
218 KB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST CTC-05 (STEP)
A realistic machined part from NIST's PMI CAD test models (Combined Test Case 5), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
319 KB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST CTC-04 (STEP)
A realistic machined part from NIST's PMI CAD test models (Combined Test Case 4), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
774 KB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST CTC-03 (STEP)
A realistic machined part from NIST's PMI CAD test models (Combined Test Case 3), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
246 KB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST CTC-02 (STEP)
A realistic machined part from NIST's PMI CAD test models (Combined Test Case 2), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
1.1 MB · by NISTDetails & download
stepRotate in 3D
Machined test part NIST CTC-01 (STEP)
A realistic machined part from NIST's PMI CAD test models (Combined Test Case 1), designed to exercise geometric dimensioning and tolerancing in CAD software. STEP AP203 solid geometry: open it in the viewer to rotate, measure and section it, or use it as a reference part for CAD, CAM and inspection workflows. The matching dimensioned drawing is in the Drawing Library.
230 KB · by NISTDetails & download
x3dRotate in 3D
Server rack 42u - Original MEP CAD (X3D)
Server rack 42u - Original MEP CAD. Overall size 0.600 x 1.104 x 2.017 m; original unbranded model. Overall 0.6 x 1.1 x 2 m. The same original model as "Server rack 42u - Original MEP CAD", exported to X3D with its materials where the format carries them; useful as a sample file for that format. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.
954 KBDetails & download

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