Polymer ball screw BSR series

steelprecisionrolled

Overview
Miniature ball screw assemblies by PBC Linear convert rotary motion to precise linear motion with low friction and high repeatability. Assemblies combine precision-rolled 1050 steel screw shafts with recirculating-ball nuts. Available screw diameters: 6 mm, 8 mm and 10 mm; lead options: 1 mm, 2 mm and 2.5 mm. Nut configurations include cylindrical, flanged and externally threaded cylindrical designs. Optional preload, multi-liner ball return and polymer wipers improve rigidity, lead accuracy and contamination resistance for compact motion systems.

Key features

• Precision-rolled 1050 steel screw shafts
• Nut types: cylindrical, flanged, externally threaded cylindrical
• Multi-liner ball return system for smooth recirculation
• Optional preload to increase rigidity and positional accuracy
• Polymer wipers at each nut end to limit debris ingress
• Improved durability and lead accuracy vs. lead screws under high loads

Applications

• Robotics and robot axes
• CNC machines and motion-control stages
• Industrial automation and handling equipment
• Lab automation and compact medical devices requiring precise linear motion

Technical specifications

• Material (screw): precision-rolled 1050 steel
• Available diameters: 6 mm, 8 mm, 10 mm
• Available leads: 1 mm, 2 mm, 2.5 mm
• Nut configurations: cylindrical, flanged, externally threaded cylindrical
• Ball return: multi-liner ball return system
• Optional features: preload for enhanced rigidity/accuracy
• Sealing: polymer wipers at each nut end to limit debris ingress
• Maximum static axial load capacity: 2.144 kN (482 lb)
• Motor compatibility: compatible with NEMA 08–23 motors (assemblies supplied without motors); selected assemblies integrate PowerPlus technology for ~25–40% increased torque
• Manufacturing: US-made miniature assemblies designed for shorter lead times