Google+ Language Who we are The quality The product Revisions Exhibitions Contacts Scaravella F.lli Srl - Via Bentelli, 25 - 29121 PIACENZA - Italy Tel. +39.0523.480192 +39.0523.480121 - Fax +39.0523.481334 p.iva 00102430337 ... THE PART THAT IS MISSING TO THE SUCCESS OF YOUR PROJECT! The ball screw is a device that allows the transformation of a rotary motion into a translational motion. It consists of a screw and a nut screw with concave thread made to obtain the coupling between the parts by means of spheres whose purpose is to obtain the transformation of the motion in conditions of rolling friction rather than sliding friction, obtaining a very efficient superior to the classic screw / nut screw coupled to sliding. A better efficiency converts a smaller part of energy into friction, decreasing the expansion and increasing the duration, obtaining superior performance even with the same power used and improving precision thanks to the possibility of preload to control the play and elastic deformations (axial stiffness ), superior. During operation, the maintenance of the balls in the threads of the nut screw can take place either at the level of a single thread with a deflector that allows you to climb over the crest of the thread with a forced (internal) passage, or between multiple threads by channeling them into a tube that connects the first fillet with the last (external). The first minimizes the size of the nut by sacrificing a part of the balls in use per revolution, the second maximizes the filling at the expense of a larger footprint. For over 40 years Scaravella F.lli srl has been manufacturing recirculating ball screws ground to customer specifications. The multiplicity of screws required has allowed the company to create a large catalog of ball screws used on the most varied industrial applications. Scaravella F.lli ground recirculating ball screws can be manufactured with: - Accuracy class 3-5-7 according to ISO 3408 - Diameter from 16 mm to 63 mm - Pitch from 4 mm to 40 mm - Length up to 5600 mm - Dynamic load from 800 daN up to 10.000 daN - Static load from 1.000 daN up to 17.000 daN