page_title: Train wheel
hierarchical_section_title: Train wheel
caption_attribution_description: Rolling stock standard axle on rail Personal 3D model made with Hamapatch and Povray
context_page_description: A train wheel or rail wheel is a type of wheel specially designed for use on railway tracks. A rolling component is typically pushed onto an axle and mounted directly on a railway carriage or locomotive, or indirectly on a bogie, also called a truck. Wheels are cast or forged and are heat-treated to have a specific hardness. New wheels are trued, using a lathe, to a specific profile before being pressed onto an axle. All wheel profiles must be regularly checked to ensure proper interaction between the wheel and the rail. Incorrectly trued, or worn out wheels can increase rolling resistance, reduce energy efficiency and may even cause a derailment. A railroad wheel typically consists of two main parts: the wheel itself, and the tire around the outside. A rail tire is usually made from steel, and is typically heated and pushed onto the wheel, where it remains firmly as it shrinks and cools. Monobloc wheels do not have encircling tires, while resilient rail wheels have a resilient material, such as rubber, between the wheel and tire.
context_section_description: A train wheel or rail wheel is a type of wheel specially designed for use on railway tracks. A rolling component is typically pushed onto an axle and mounted directly on a railway carriage or locomotive, or indirectly on a bogie (in the UK), also called a truck (in North America). Wheels are cast or forged and are heat-treated to have a specific hardness. New wheels are trued, using a lathe, to a specific profile before being pressed onto an axle. All wheel profiles must be regularly checked to ensure proper interaction between the wheel and the rail. Incorrectly trued, or worn out wheels can increase rolling resistance, reduce energy efficiency and may even cause a derailment. A railroad wheel typically consists of two main parts: the wheel itself, and the tire (or tyre in British English) around the outside. A rail tire is usually made from steel, and is typically heated and pushed onto the wheel, where it remains firmly as it shrinks and cools. Monobloc wheels do not have encircling tires, while resilient rail wheels have a resilient material, such as rubber, between the wheel and tire.
caption: Railroad car wheels are affixed to a straight axle, such that both wheels rotate in unison. This is called a wheelset.
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