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The HRV Series is a variant of the RV series of satellite roller screws which is suited for extremely high load applications or where extended product life is required. The design is an optimized version of the RV Series design, with more contact points in the assembly and a new thread profile. Because of this, dynamic load capacities of up to 3893.4kN can be achieved.
Due to their large diameters the HRV range is not available with internal preload options.
The main elements of HRV satellite roller screws are the screw, the nut and satellite rollers. They primarily have multiple-start thread formats. The angle between the flanks is 90° and the profile is triangular. The nut has an internal thread identical to that of the screw. The rollers have a single-start thread with an angle the same as that of the nut. This ensures there is no axial movement between the nut and the rollers. The rollers do not therefore need to be recycled. The flanks of the roller thread are convex.
At each end of the rollers there is a cylindrical pivot and gear teeth. The pivots are mounted in the holes of the end rings, thus ensuring the rollers are equidistant. The end rings are floated in the nut body and axially secured with circlips. The gear teeth engage in gear wheels fixed in the nut. This guides the rollers parallel to the axis to ensure perfect functioning.