Definition

Rigid train wheelsets are wheels and axles cemented together, with both wheels having the same angular velocity. Rigid wheelsets are commonly used in large railways, high speed railways, heavy loads and subways;

Independent train wheelsets are wheels and axles articulated together for free rotation. They are mainly used in light rail vehicles and low-floor vehicles. China's Changchun, Dalian and other places in the light rail car on the use of independent wheelsets. Low-floor cars use a low-floor wheelset, suitable for inner-city rail transport, which is also relative to the advantages of rigid wheel tracks.

Differrnce

Rigid train wheelsets: mature technology, good guiding performance in curved sections, serpentine instability.

Independent train wheelsets help to improve the stability of the vehicle system; rigid wheel pairs help to improve the curve passing performance of the vehicle system on routes with a large curve radius; both are better as guiding wheels; independent wheel pairs guiding units subject to guiding control have better guiding performance.