![The picture shows a detail of the safety gear BF series progressive safety gear /BF series / EN81-20 / Sautter Lift Components GmbH / SLC](https://slc-liftco.com/wp-content/uploads/2019/07/einstellvorrichtung_bf-fangvorrichtungen-e1564240469149.jpg)
characteristics bf2d-2
![The picture shows the progressive safety gear BF2D-2 from the front Basic body of the BF2D-2 mounted in outer housing, EN81-20 / 50, acting bi-directional](https://slc-liftco.com/wp-content/uploads/2019/06/BF2D-2_L_2-768x519.jpg)
Type:
Progressive safety gear (downwards)
Protection device against overspeed (upwards)
Protection device against unintended car movement (UCM)
Guide rail:
Drawn / Machined
Guide rail thickness: 9 – 30 mm
Guide rail width (minimum): 20 mm
Maximum tripping speed
Machined: 3.23 m/s
Drawn: 2.63 m/s
UCM: 2.20 m/s
Maximum nominal speed
Drawn: 2.20 – 2.29 m/s
Machined: 2.50 – 2.81 m/s
Permissible total mass acting downwards
![Permissiple total mass BF2D-2 acting downwards Safety brake device, bi-directional acting, EN81-20 / 50, Lifts Directive 2014/33 / EU](https://slc-liftco.com/wp-content/uploads/2019/08/Einsatzbereich_BF2D-2_en.png)
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Permissible brake forces for acting upwards
![Permissible brake forces BF2D-2 for acting upwards Safety brake device, bi-directional acting, EN81-20 / 50, Lifts Directive 2014/33 / EU](https://slc-liftco.com/wp-content/uploads/2019/07/2-4.png)
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Permissible brake forces as UCM-device
![Permissible brake forces BF2D-2 as UCM device Safety brake device, bi-directional acting, EN81-20 / 50, Lifts Directive 2014/33 / EU](https://slc-liftco.com/wp-content/uploads/2019/07/3-4.png)
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