Free 3D models · STL · GLB · AR
Free 3D models of machines and their parts
Engine‑X has free, real-scale 3D models of 8 machines (turbocharger, pulley & belt drive, centrifugal pump, helical gear reducer, marine diesel engine, plate heat exchanger, reciprocating air compressor and planetary gearbox), 615 named pieces and 257 downloadable parts. Download each one as GLB or STL, see it in AR on your phone, or play it in the live 3D atlas, where you can explode it, cut it open and watch it run.
TurbochargerJournal-bearing turbo · Ø60 mm compressor · internal wastegateView and download →
Pulley & belt driveV-belt speed reducer · Ø100/Ø250 mm pulleys · 2.50 : 1View and download →
Centrifugal pumpSingle-stage end-suction · Ø164 mm impeller · 6 backward-curved vanesView and download →
Helical gear reducerTwo-stage helical gearbox · 16 : 1 · 1440 → 90 rpmView and download →
Marine diesel engineInline-6 · NT855 Big Cam style · 14 L · PT fuel systemView and download →
Plate heat exchangerGasketed, 41 plates · DN100 · countercurrentView and download →
Reciprocating air compressorTwo-stage V-twin · 12 bar (175 psi) · 3.7 kWView and download →
Planetary gearboxSun 18 · planets 3 × 27 · ring 72 · 5 : 1View and download →Play them in live 3D
Open full screen →
Live 3D: drag to turn it, pinch to zoom, explode it, cut it open, X‑ray it and watch it run. Free, in your browser, no app. Open it full screen →
Every machine is in the Engine‑X atlas: Turbocharger · Pulley & belt drive · Centrifugal pump · Helical gear reducer · Marine diesel engine · Plate heat exchanger · Reciprocating air compressor · Planetary gearbox.
Every part you can download
See all 257 parts by name
- Turbocharger: turbine shaft, compressor wheel (hub), compressor blade, splitter blade, compressor nut, turbine wheel (hub), turbine blade, thrust collar & oil slinger, piston-ring seal (compressor side), piston-ring seal (turbine side), centre housing (chra), journal bearing (compressor side), journal bearing (turbine side), thrust bearing, seal plate (insert), oil feed banjo bolt, oil drain flange, coolant port (inlet), coolant port (outlet), compressor housing, compressor inlet, compressor backplate (diffuser), compressor housing bolt, shaft speed sensor, turbine housing, turbine inlet flange (t3), turbine outlet (v-band), turbine heat shield, v-band clamp (turbine), turbine housing bolt, wastegate arm & shaft, wastegate valve (flap), wastegate actuator, actuator rod
- Pulley & belt drive: driver shaft, driver pulley (ø100 mm), driven shaft, driven pulley (ø250 mm), speed-indicator disc, idler pulley (ø50 mm), v-belt, belt reference mark, base plate, motor, pillow block (driver shaft), pillow block (driven shaft), idler bracket, belt guard, motor mounting bolt, pillow block bolt 1 (driver), pillow block bolt 2 (driver), pillow block bolt 1 (driven), pillow block bolt 2 (driven), idler pivot bolt
- Centrifugal pump: pump shaft, flexible coupling, mechanical seal (rotating ring), impeller hub, impeller front shroud, impeller blade, bearing housing, bearing (inboard), bearing (outboard), mechanical seal seat, seal gland, volute casing, suction flange, discharge flange, wear ring, casing joint bolt, casing support foot, baseplate, motor, motor mounting bolt
- Helical gear reducer: input shaft, stage-1 pinion (18 teeth), input shaft key, coupling hub (gearbox side), coupling spider, intermediate shaft, stage-1 gear (72 teeth), stage-2 pinion (19 teeth), output shaft, output gear (76 teeth), output shaft key, input shaft bearing, intermediate shaft bearing, output shaft bearing, input shaft oil seal, output shaft oil seal, bearing cover, lower housing, upper housing (cover), inspection cover, breather, lifting eye, magnetic drain plug, base frame, motor (1.5 kw, 1440 rpm), coupling hub (motor side), cover bolt, foot bolt, motor bolt
- Marine diesel engine: crankshaft, crankshaft gear (30 teeth), vibration damper, flywheel, flywheel ring gear, piston, piston pin, connecting rod, camshaft, camshaft gear (60 teeth), intake cam follower, intake push tube, intake rocker lever, injector cam follower, injector push tube, injector rocker lever, exhaust cam follower, exhaust push tube, exhaust rocker lever, intake crosshead, intake valve, valve spring, exhaust crosshead, exhaust valve, pt unit injector, injector plunger, pt fuel pump, fuel filter, fuel supply line, fuel drain line, filter to pump line, exhaust manifold (water-cooled), turbocharger, turbo rotor (turbine and compressor wheels), water-cooled exhaust elbow, air filter, compressor-to-aftercooler pipe, aftercooler and intake manifold, heat exchanger and expansion tank, heat exchanger tube bundle, sea water pump, sea water pump impeller, fresh water (coolant) pump, thermostat housing, coolant pipe to heat exchanger, coolant pipe to water pump, sea water pipe to heat exchanger, oil pan, oil cooler, oil filter, oil filter head, dipstick, cylinder block, cylinder liner, cylinder head, rocker housing and cover, main bearing cap, front gear cover, flywheel housing, starter motor, engine mount, base plate
- Plate heat exchanger: start plate, heat transfer plate, end plate, frame plate, frame plate foot, pressure plate, pressure plate roller, carrying bar, guiding bar, support column, lifting lug, nameplate, tightening bolt, tightening nut, tightening bolt cover, foundation bolt, hot water inlet (dn100), hot water outlet (dn100), cold water inlet (dn100), cold water outlet (dn100), flange gasket, port lining
- Reciprocating air compressor: crankshaft, main bearing, lp piston (ø100 mm), lp piston pin, lp connecting rod, hp piston (ø53 mm), hp piston pin, hp connecting rod, lp cylinder barrel, lp valve plate, lp cylinder head, lp suction reed valve, lp delivery reed valve, hp cylinder barrel, hp valve plate, hp cylinder head, hp suction reed valve, hp delivery reed valve, crankcase, breather and oil-fill cap, oil drain plug, intake air filter, intercooler (finned tube), discharge tube, check valve, flywheel fan pulley (ø320 mm), motor pulley (ø100 mm), v-belt, motor (3.7 kw, 2880 rpm), belt guard, air receiver tank, saddle plate, tank foot, pressure switch with unloader, pressure gauge, unloader tube, safety valve, service (outlet) valve, drain valve, lp head bolt, hp head bolt, pump mounting bolt, motor mounting bolt
- Planetary gearbox: input shaft, sun gear (18 teeth), input coupling (clamping hub), planet gear 1 (27 teeth), planet needle bearing, planet thrust washer, planet gear 2 (27 teeth), planet gear 3 (27 teeth), planet carrier, output shaft, output shaft key, planet pin, ring gear (72 teeth), gear housing, input housing (motor adapter), output housing, input shaft bearing, output bearing, output shaft oil seal, breather plug, oil drain plug, oil level plug, motor (1.5 kw, 1440 rpm), base plate, foot bolt, motor bolt, housing bolt
Common questions
Where can I download free 3D models of machines?
Engine-X has free, real-scale 3D models of 8 machines (turbocharger, pulley & belt drive, centrifugal pump, helical gear reducer, marine diesel engine, plate heat exchanger, reciprocating air compressor and planetary gearbox) at engx3d.com/3d-models, with 257 individual parts. Each one downloads as GLB or STL, works in AR on a phone and runs live in the 3D atlas.
Are the Engine-X 3D models free for commercial use?
They are free for personal and educational use under CC BY-NC 4.0 with the credit "Engine-X by Parth Parmar (engx3d.com)". Commercial use, selling the files or selling prints needs written permission.
Can I download a single part instead of the whole machine?
Yes. Every model page lists each part with a picture, a description and its own STL file, and offers a ZIP of all parts.
What is the Engine-X 3D atlas?
A free interactive 3D viewer in the browser. Each machine runs with true motion, and you can explode it, cut it open, X-ray it and tap any part to see what it does.
Free for personal and educational use under CC BY-NC 4.0. Credit “Engine-X by Parth Parmar (engx3d.com)” when you share or remix it. Don’t sell the files or prints. For commercial use, get in touch. Every file carries the Engine-X mark and a hidden digital fingerprint that identifies it.
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