Thomson Linear 421N20URL4000 Profile Rail, 400 Series Ball Rail, 4000 mm Long, Size: 20 mm, Normal Grade, U Style, Steel Alloy,

DescriptionPolymer ball-return tube reduces noise and vibration while retaining lubricationStandard double lip end and longitudinal seals retain lubrication while protecting the bearing from contaminationLubrication channels that direct lubricant to individual ball tracks, maximizing lubricating effectivenessDouble-faced ball tracks utilize a 45° face-to-face bearing arrangement, resulting in equal load-carrying capacity in all directionsCarriages available with two internal configurations: standard ball bearings only (411), or premium ball cage added (413). When compared to the 411 design, the 413 option provides increased travel smoothness, lower noise at high speeds, and individual lubricant reservoirs. Both configurations are designed to run on the same rail (421)Dimension[B1]20.0 mm (+0.02 / -0.05)[G2]10.0 mm[J1]16.3 mm[S3]M6[X]60.0 mm