BL is a long block, its load/moment ratings likely align more closely with the FL variant than the shorter BN. It Features 4-row 45° ball contact angles, enabling uniform load distribution in radial, reverse-radial, and lateral directions—ideal for varied orientations and demanding applications like CNC, automation, and heavy engineering. BL= Long & Block Design. NTN-SNR linear guides are high-quality precision products. Dimensions according to DIN 645-1 and DIN 645-2. Arrangement of the race ways at a 45° angle which results in equal load ratings in all main directions. Low system friction with a maximum friction coefficient, μ of 0.003 due to circular arc grooves. Multitude of lubrication connections can be mounted on all sides of the carriage, Flange carriages allows screw connection from the top and the bottom. All seals in two-lip versions for optimal protection of the carriage against liquid and solid foreign particles. Range of sealing options for special applications, Linear guides with ball chain and conventional types on one rail.
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