Maintenance Free by Reducing Grease Loss! NB Reverse-Seal is a seal unit that consists of reverse plate, seal, and cover. This seal unit has another side-seal in the reverse orientation to the block. guide rail Part Number Structure with reverse-seal ^please contact NB for details. It is available for sizes 1 5—25 of standard SGL types. Block total length is shown in the table below. Please refer to NB general catalog for other dimensions. SGL-TF, HTF> HYF type SGL-TE, HTE> HYE, HTEX type

•The space between two seals holds grease to minimize grease leakage from the block. grease-leak test data: test conditions : vertical axis, applied load (no load), average speed (60m/min), stroke (375mm) SGL20TF comparison of grease leakage •Reverse-seal makes a "Grease Pocket" between the two seals that realizes MAINTENANCE FREE by reducing grease leakage and loss. grease dry-up test data: test conditions: applied load (no load), average speed (60m/min), stroke (420mm) * A few grams of oil absorbing material was applied every 5 minutes. SGL25TF ©standard: 31 5 km ©with reverse-seal: 4,500 km...