![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-1/bf1d-1
![The picture shows the progressive safety gear BF2D-1/BF1D-1 (Tandem) from the front Basic body of the BF2D-1/BF1D-1 mounted in outer housing, EN81-20 / 50, acting bi-directional](https://slc-liftco.com/wp-content/uploads/2019/07/Dunkel_BF2D1_BF1D1_L-e1562586897279-768x566.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: 2.62 m/s
Drawn: 2.16 m/s
UCM: 2.20 m/s
Maximum nominal speed
Drawn: 1.60 – 1.88 m/s
Machined: 2.00 – 2.28 m/s
Permissible total mass acting downwards
Machined (dry / oiled): 1,060 – 5,266 kg
Drawn (dry / oiled): 1,060 – 5,266 kg
Permissible brake forces for acting upwards
Machined (dry / oiled): 8,322 – 41,330 N
Drawn (dry / oiled): 8,322 – 41,330 N
Permissible brake forces as UCM-device (downwards)
Machined (dry / oiled): 16,644 – 82,660 N
Drawn (dry / oiled): 16,644 – 82,660 N
Permissible brake forces as UCM-device (upwards)
Machined (dry / oiled): 8,322 – 41,330 N
Drawn (dry / oiled): 8,322 – 41,330 N