H-Precision 12mm Linear Rail Kit

A lightweight yet robust linear motion solution with a nominal 12mm rail width and H-class precision grading. Total weight ranges between 217g and 416g depending on rail length, with this variant supplied as a 300mm rail paired with one matching slide block. Constructed entirely from bearing steel for wear resistance and long-term dimensional stability. Available in multiple standard lengths (250mm to 550mm), all sharing identical cross-section geometry and mounting interface. The slide block employs a four-point contact recirculating ball design that distributes load evenly across four quadrants, enhancing stiffness and motion fidelity. A dedicated ball retainer maintains preload consistency and allows safe interchangeability between blocks of the same specification. A miniature steel wire retention system secures balls inside the block housing even when fully disassembled — a key reliability feature for serviceable or modular equipment designs. Widely applied in semiconductor handling stages, small CNC modules, vision inspection platforms, and benchtop automation where accuracy and compactness are prioritised.