NBK Made in Japan BRDSF-40 Flange Type Ball Transfer Unit for Downward and Sideward Facing ApplicationsBRDSF 40 Flange Type Ball Transfer Unit for Downward and Sideward Facing Applications Part Number D D1 L s T Db P R Withstand Load (N) BRDSF 40 40 24 24 5 4 15. 88 32 4. 5 900 BRDSF 40 ball rollers can be used in downward and sideward applications such as with casters of push carts for transport, FPD production equipment, semiconductor devices, food production lines, and packaging lines. A dust proof seal prevents the ingress of dirt and dust. The