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2. Portal axle - Wikipedia

   en.wikipedia.org/wiki/Portal_axle

   A portal axle (or portal gear lift) is an off-road vehicle suspension and drive technology where the axle tube or the half-shaft is offset from – usually above – the center of the wheel hub and where driving power is transferred to each wheel via a simple gearbox, built onto each hub. [1] It gives two advantages: ground clearance is ...

3. List of railroad truck parts - Wikipedia

   en.wikipedia.org/wiki/List_of_railroad_truck_parts

   A Bettendorf -style truck with axle boxes, which are not part of the side frames, at the wheels. A Swiss axlebox. Japanese archbar truck with axleboxes at the wheels. Diamond frame bogie, elliptical springs and American style journal boxes. Closeup of a shared bogie with 4 specially adapted side bearings and an articulated connector between two ...

4. Bogie - Wikipedia

   en.wikipedia.org/wiki/Bogie

   A bogie (/ ˈboʊɡi / BOH-ghee) (or truck in North American English) is a chassis or framework that carries a wheelset, attached to a vehicle—a modular subassembly of wheels and axles. Bogies take various forms in various modes of transport. A bogie may remain normally attached (as on many railroad cars and semi-trailers) or be quickly ...

5. Glossary of rail transport terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_rail_transport...

   Also Centering spring cylinder. A cylindrical cast-iron holder in which an adjusting string is placed. Adjusting spring seat A casting, or a part of the bolster of a two-wheel trailing truck, forming a bearing for the end of the adjusting spring. Admission The opening of steam port to admit steam to one end of a cylinder. If the valve has no lead, admission takes place at the moment the piston ...

6. Toolbox - Wikipedia

   en.wikipedia.org/wiki/Toolbox

   Toolbox. Standard site toolbox as used, e.g., in mechanical workshops like automobile repair shops. . A toolbox (also called toolkit, tool chest or workbox) is a box to organize, carry, and protect the owner's tools. They could be used for trade, a hobby or DIY, and their contents vary with the craft.

7. Train inspection system - Wikipedia

   en.wikipedia.org/wiki/Train_inspection_system

   Wheel Profile monitors [9] A laser wheel profile detector. Laser and optical scanning wayside inspection devices (known as TBOGI—Truck Bogie Optical Geometry Inspection Systems) make images of the flange and tread. These measurements are compared with acceptable dimensions. When worn beyond limits, the wheels are scheduled for replacement.