Effort perfectly regulated at low speed
The connecting rod bogies were then replaced by bogies with bridges and cardan shafts. These machines, capable of running at 90 km/h but also of maintaining a constant effort at low speeds, were chosen by Speno to pull the track grinding trains.
![Locomotives 600 Speno number 2 Locomotives 600 Speno number 2](/temp-pictures/locomotives-600-speno-number-2_690.jpg)
General characteristics
![Diagram BB SPENO Diagram BB SPENO](/temp-pictures/diagram-bb-speno_690.jpg)