Anti-Rotation Device

About Anti-Rotation Device (ARD):

NMTG Anti-Rotation Device (ARD) are backstopping clutch designed to prevent reverse rotation of fan shafts. They are also known as Backstop Clutches, Horizontal Fan Backstop/Vertical Fan Backstop & Freewheel One-Way Clutch & Holdback Devices.

Anti-Rotation Device (ARD) are sprag type design with sealed grease lubricated ball bearings that require no maintenance. They are supplied with a flange for direct mounting to standard bushings.