Low Speed Backstops FRHN with lever arm in metric dimensions with sprags Application as ➧ Backstop for installations with low speeds. The freewheels are designed for the use in inclined conveyorbelts, elevators or pumps. Taconite seals protect the freewheels from contamination with dust or dirt. Low Speed Backstops FRHN with lever arm are sealed sprag freewheels with ball bearings. They are supplied oil-filled and ready for installation. The Low Speed Backstops FRHN are arranged on through shafts or shaft ends. Nominal torques up to 503 550 Nm. Bores up to 320 mm Application example Motor Backstop FRHN 1 200 on the head drum shaft of an inclined conveyor belt system. The lever arm is bolted to the freewheel. The backdriving torque is supported by the lever arm on the base plate. When the conveyor belt is without any load, the drum shaft can be turned in both directions during maintenance by removing the bolts. Reduction gear Head pulley Conveyor Belt Mounting The backdriving torque is supported by the lever arm.The lever arm must not be clamped into position. It must have 12,7 mm play in the axial and in the radial direction. The tolerance oft the shaft must be ISO h6 or j6. Example for ordering Freewheel size FRHN 1 200 with a 230 mm bore: • FRHN 1 200, d = 230 mm

The maximum transmissible torque is 2 times the specified nominal torque.See page 14 catalogue„Freewheels" for determination of selection torque. Keyway dimensions upon request by customers.