Scheffel bogie

File:Class 6E1 E1525 c. 1978.jpg unit no. E1525 with re-geared traction motors, Scheffel bogies, and a streamlined nose cone on the no. 1 end. In this configuration, no. E1525 reached a speed of {{convert|245|km/h|mph|0|abbr=off}}, which remains the world narrow-gauge speed record.]]

A Scheffel bogie is a flexible, high-stability radial bogie designed to reduce lateral force vibrations and accommodate turning on narrow gauge tracks at high speed. It first went into service in a fleet of South African Railway (SAR) ore wagons in 1975.{{cite web|url=http://www.theheritageportal.co.za/article/scheffel-bogie-and-rail-gauge|title=The Scheffel Bogie and the Rail Gauge|author=Ball P|publisher=The Heritage Portal|date=24 May 2016|access-date=3 May 2019}}{{cite web|url=https://www.iol.co.za/capeargus/sas-sheffel-bogie-keeps-on-rolling-1053555|title=SA's Sheffel Bogie keeps on rolling|author=Bruton M|publisher=IOL|date=7 April 2011|access-date=3 May 2019}} It is named after its inventor, Dr. Herbert Scheffel, who designed the Scheffel bogie to facilitate the development of South Africa's {{Track gauge|1067mm|lk=on}} narrow-gauge railway system. The Scheffel bogie was used to set the world narrow gauge speed record of {{convert|245|km/h}} on Cape gauge tracks.{{cite web|url=http://www.traintesting.com/SAR.htm|title=Pantograph Testing in South Africa in 1980|publisher=Testing Trains|author=Coxon D|access-date=3 May 2019}}