XL CATALOG

IML, HDL, PKL TECHNOLOGIES The Loading ball screw family offers high dynamics and high loads for injection molding machines, presses and other heavy duty applications operated by electric servodrives which may reach extreme working condition requirements. Loading ball screws offer top results with high durability and reliability. The technology of these ball screws contributes towards achieving especially high values of dynamic and static load capacity, as well as high values of maximum permissible loads. The optimized recirculation system design leads to improved results in several key aspects of the ball screw. A Loading ball screw can be designed with U-type or B-type recirculation system. A U-shaped or a B-shaped deflector smoothly redirects the balls in tangential direction through a recirculating hole along the nut. Then another U-shaped or B-shaped deflector feeds the balls back into the recirculation circuits. These designs include a tangential ball pick-up that minimizes collisions between balls and recirculation system, and a specific 3D curve design to avoid collisions between balls. This optimised ball recirculation system guarantees a very smooth rotation as it ensures ball circulation to be uniform and ordered, avoiding any crashes between balls and resulting in very low noise levels and enabling the use of higher feed speed values, thus reaching DN values up to 170.000. In Loading ball screws, components are subjected to high forces. This fact, accompanied by the high speed achieved by applications like injection moulding machines makes the design and materials of the recirculation systems especially important. The Loading nut design is based on a single nut distribution, offering a very compact and easy to adapt design for machine applications. The nut is not preloaded and has a slight axial play. This axial play depends on the duty cycle and expected working temperature. A temperature increase, which affects negatively to the correct ball screw performance, is avoided. Accuracy grade and axial play · H 0.020 mm or less. · A 0.040 mm or less. U-type recirculation B-type recirculation 12