Monport Track Guide Ball Bearing 4 Pcs for 40W-150W CO2 Laser Engraver（5mmx17mmx8mm）

U-GROOVE RAIL BEARINGS: SG15 U-groove rail bearings, stainless steel deep groove ball bearings, driven by round nylon and rubber belts, used in machine tools, electronic equipment, 3D printers, plastic machines, textiles, etc.

SIZE: inner diameter -5mm; outer diameter 17mm; width 8mm; round guide rail corresponds to belt diameter 6mm;

MATERIAL: stainless bearing steel AISI440 (9Cr18)

MOVEMENT MECHANISM: single row ball steel ball, S special angle design.

APPLICABLE ENVIRONMENT: the high-speed, bilateral seal is suitable for dusty environments.