SKF LB40 Linear Ball Bearing

SKF LB40 Linear Ball Bearing delivers precise, low-friction linear motion on round shafts, featuring a 1-3/8 inch bore with an overall length of 3-1/8 inches and a width of 2-3/8 inches. This LB40 unit is part of SKF's LB series and is designed to ride on a compatible shaft to enable smooth, repeatable travel in compact linear assemblies. With its imperial envelope (ID 1-3/8", L 3-1/8", W 2-3/8"), it suits small- to mid-sized automation, robotics, and CNC guide applications where space is at a premium and positioning accuracy matters. Engineers typically use LB40-sized bearings to define the bearing footprint in an axis package and simplify sourcing for maintenance within the LB family. As a standard SKF component, it integrates with compatible shafting and housing arrangements, enabling straightforward replacement in established linear motion benches and tooling setups. When designing a linear axis, choosing the LB40 size helps balance stiffness, travel, and compactness in tight installations.