Pneumatic Motor Low-poly 3D model is available on CGTrader for $120. Original author: bubercreative.
SLDPRT (SolidWorks, filesize: 4.01 MB), DWG (AutoCAD, filesize: 4.01 MB), FBX (Autodesk FBX, filesize: 4.01 MB), DXF (DXF, filesize: 4.01 MB), BLEND (Blender, filesize: 4.01 MB), STP (STEP, filesize: 4.01 MB), C4D (Cinema 4D, filesize: 4.01 MB), SKP (Sketchup, filesize: 4.01 MB)