It was based on a patent of 1883 by James Cleminson, and was once popular on narrow-gauge rolling stock, e.g.


Fitted with SKF or Timken bearings, it was introduced in the late 1950s for all BR Mark 1 vehicles.


A heavier-duty version, the B5, was standard on Southern Region Mk1-based EMUs from the 1960s onwards.


The bogie had a conventional bolster suspension with swing links carrying a spring plank. ==== B4 bogie ==== The B4 bogie was introduced in 1963.


Some of the B4-fitted Mark 2s, as well as many B4-fitted Mark 1 BGs were allowed to run at with extra maintenance, particularly of the wheel profile, and more frequent inspection. ==== BT10 bogie ==== The BT10 bogie was introduced on the British Rail Mark 3 coach in the 1970s.


The EMD version, designated HTCR, was made standard equipment for the SD70 series, first sold in 1993.


GE introduced their version in 1995 as a buyer option for the AC4400CW and later Evolution Series locomotives.


These include the SUW 2000 system from ZNTK PoznaƄ. === Cleminson system === The Cleminson system is not a true bogie, but serves a similar purpose.


Thus EMD introduced the HTSC truck in 2003, which basically is the HTCR stripped of radial components.

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