SAB Wheels

The company behind SAB wheels is Svenska Aktiebolaget Bromsregulator in Malmö, Sweden. First trials were done with a two-axle tram in Malmö, starting on 9 Dec 1933. During the next years also tramways in Göteborg (Gothenburg) and Stockholm became interested. First trials in "real" railway use were obviously done in France with a railcar.

For many people SAB wheels are best known from newer Swedish electric locomotives with coupled wheels, classes Da, Dm and Dm3.  Dm 1201-1230 & 1249-1250 and Dm3 1231-1247 were delivered with SAB wheels in 1963-1970. Da 917 was the first Da with SAB wheels, installed in April 1971. Most of the class had their original wheels replaced by SAB wheels in 1974 to 1980.

This a 4-page E/1960s brochure from the company (with a bigger image of the drawing):