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.
3444 3D parts · STEP, STL, SketchUp, 3MF, OBJ, glTF, IFC, Rhino and more · public domain
310 3D parts in Mechanical · Clear all
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V-twin piston engineV-twin piston engine. Overall size 0.429 x 0.502 x 0.437 m; original unbranded model. Overall 429 x 502 x 437 mm. Nominal size: 429.3 x 502.2 x 436.5 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
5.3 MBDetails & downloadstepRotate in 3D
Single-cylinder four-stroke generator engineSingle-cylinder four-stroke generator engine. Overall size 0.394 x 0.479 x 0.442 m; original unbranded model. Overall 394 x 479 x 442 mm. Nominal size: 393.5 x 478.6 x 442.0 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
4.1 MBDetails & downloadstepRotate in 3D
Seven-cylinder radial aero engine, cutawaySeven-cylinder radial aero engine, cutaway. Overall size 0.403 x 0.796 x 0.778 m; original unbranded model. Overall 403 x 796 x 778 mm. Nominal size: 403.0 x 795.9 x 778.0 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
16.1 MBDetails & downloadstepRotate in 3D
Seven-cylinder radial aero engine, assembledSeven-cylinder radial aero engine, assembled. Overall size 0.403 x 0.796 x 0.778 m; original unbranded model. Overall 403 x 796 x 778 mm. Nominal size: 403.0 x 795.9 x 778.0 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
13.9 MBDetails & downloadstepRotate in 3D
Four-cylinder inline piston engine, cutawayFour-cylinder inline piston engine, cutaway. Overall size 0.604 x 0.492 x 0.666 m; original unbranded model. Overall 604 x 492 x 666 mm. Nominal size: 604.0 x 492.0 x 666.0 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
13.6 MBDetails & downloadstepRotate in 3D
Four-cylinder inline piston engine, assembledFour-cylinder inline piston engine, assembled. Overall size 0.604 x 0.531 x 0.666 m; original unbranded model. Overall 604 x 531 x 666 mm. Nominal size: 604.0 x 531.0 x 666.0 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
15.0 MBDetails & downloadstepRotate in 3D
Flat-four aero piston engineFlat-four aero piston engine. Overall size 0.734 x 0.840 x 0.568 m; original unbranded model. Overall 734 x 840 x 568 mm. Nominal size: 734.0 x 840.0 x 568.0 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
7.9 MBDetails & downloadstepRotate in 3D
Upright sprinkler head - Original MEP CADUpright sprinkler head - Original MEP CAD. Overall size 0.042 x 0.042 x 0.071 m; original unbranded model. Overall 42 x 42 x 71 mm. Nominal size: 42 x 42 x 74 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
344 KBDetails & downloadstepRotate in 3D
Sounder beacon - Original MEP CADSounder beacon - Original MEP CAD. Overall size 0.111 x 0.111 x 0.145 m; original unbranded model. Overall 111 x 111 x 145 mm. Nominal size: 110 x 105 x 145 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
69 KBDetails & downloadstepRotate in 3D
Roof access hatch - Original MEP CADRoof access hatch - Original MEP CAD. Overall size 1.030 x 1.074 x 0.330 m; original unbranded model. Overall 1030 x 1074 x 330 mm. Nominal size: 1000 x 1000 x 330 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
93 KBDetails & downloadstepRotate in 3D
Pendant sprinkler head - Original MEP CADPendant sprinkler head - Original MEP CAD. Overall size 0.042 x 0.042 x 0.071 m; original unbranded model. Overall 42 x 42 x 71 mm. Nominal size: 42 x 42 x 74 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
352 KBDetails & downloadstepRotate in 3D
Manual call point - Original MEP CADManual call point - Original MEP CAD. Overall size 0.090 x 0.057 x 0.090 m; original unbranded model. Overall 90 x 57 x 90 mm. Nominal size: 90 x 45 x 90 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
165 KBDetails & downloadstepRotate in 3D
Fire hose reel cabinet - Original MEP CADFire hose reel cabinet - Original MEP CAD. Overall size 0.800 x 0.327 x 0.900 m; original unbranded model. Overall 800 x 327 x 900 mm. Nominal size: 800 x 300 x 900 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
404 KBDetails & downloadstepRotate in 3D
Fire extinguisher cabinet - Original MEP CADFire extinguisher cabinet - Original MEP CAD. Overall size 0.420 x 0.247 x 0.900 m; original unbranded model. Overall 420 x 247 x 900 mm. Nominal size: 420 x 220 x 900 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
282 KBDetails & downloadstepRotate in 3D
Fire door closer - Original MEP CADFire door closer - Original MEP CAD. Overall size 0.220 x 0.189 x 0.077 m; original unbranded model. Overall 220 x 189 x 77 mm. Nominal size: 260 x 60 x 80 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
98 KBDetails & downloadstepRotate in 3D
Fire blanket - Original MEP CADFire blanket - Original MEP CAD. Overall size 0.180 x 0.082 x 0.340 m; original unbranded model. Overall 180 x 82 x 340 mm. Nominal size: 180 x 80 x 300 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
84 KBDetails & downloadstepRotate in 3D
Fire alarm panel - Original MEP CADFire alarm panel - Original MEP CAD. Overall size 0.420 x 0.114 x 0.540 m; original unbranded model. Overall 420 x 114 x 540 mm. Nominal size: 420 x 100 x 540 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
204 KBDetails & downloadstepRotate in 3D
Extinguisher stand pair - Original MEP CADExtinguisher stand pair - Original MEP CAD. Overall size 0.500 x 0.330 x 0.815 m; original unbranded model. Overall 500 x 330 x 815 mm. Nominal size: 500 x 330 x 820 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
368 KBDetails & downloadstepRotate in 3D
Emergency assembly sign - Original MEP CADEmergency assembly sign - Original MEP CAD. Overall size 0.600 x 0.012 x 0.400 m; original unbranded model. Overall 600 x 12 x 400 mm. Nominal size: 600 x 10 x 400 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
259 KBDetails & downloadstepRotate in 3D
Dry riser inlet - Original MEP CADDry riser inlet - Original MEP CAD. Overall size 0.600 x 0.180 x 0.480 m; original unbranded model. Overall 600 x 180 x 480 mm. Nominal size: 600 x 180 x 480 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
149 KBDetails & downloadstepRotate in 3D
Concealed sprinkler head - Original MEP CADConcealed sprinkler head - Original MEP CAD. Overall size 0.076 x 0.076 x 0.045 m; original unbranded model. Overall 76 x 76 x 6 mm. Nominal size: 76 x 76 x 45 mm. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
14 KBDetails & downloadstepRotate in 3D
Wall inverter - Original MEP CADWall inverter - Original MEP CAD. Overall size 0.450 x 0.243 x 0.676 m; original unbranded model. Overall 450 x 243 x 676 mm. Nominal size: 449.9 x 243 x 675.9 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
403 KBDetails & downloadstepRotate in 3D
Wall home battery - Original MEP CADWall home battery - Original MEP CAD. Overall size 0.760 x 0.222 x 1.200 m; original unbranded model. Overall 760 x 222 x 1200 mm. Nominal size: 759.8 x 222 x 1199.8 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
162 KBDetails & downloadstepRotate in 3D
Wall ev charger - Original MEP CADWall ev charger - Original MEP CAD. Overall size 0.493 x 0.202 x 0.425 m; original unbranded model. Overall 505 x 212 x 420 mm. Nominal size: 493 x 202 x 425 mm overall. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. 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.
408 KBDetails & download
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