THK Co., Ltd. SR15-820LY Linear Motion Guide Rail

The THK SR15-820LY Linear Motion Rail is an 820 mm radial-type, full-ball linear guide rail designed for SR15 blocks, delivering smooth, low-friction travel with a compact 15 mm-wide profile and precision-ground raceways in hardened alloy bearing steel (58–64 HRC) for long wear life. It is compatible with SR15V, SR15W, SR15SB, and SR15TB bearing blocks, with a 60 mm mounting hole pitch, 20 mm end distance, and M3.5 rail screws, making it suitable for OEM replacement, machine repair, retrofit projects, and the construction of precision motion assemblies. Common applications include semiconductor manufacturing equipment, precision measuring machines, medical devices, packaging equipment, CNC machinery, robotics, laboratory automation, vision inspection systems, and general factory automation. Additional specs include standard precision rail style, full-ball guide, lubrication compatible with grease or oil, and optional corrosion protection; maximum standard rail length up to 3000 mm (model dependent); accuracy grades Normal, H, P, SP, UP.