Satellite roller screws

The main elements of RV and BRV satellite roller screws are the screw, the nut and satellite rollers.

The screw has a multiple-start thread. 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.