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NOTES ON HANDLING AND USE

Follow the instructions below to maintain the accuracy of NB linear system as a precision part and to use it safely.(1) Notes on Handling Any shock load caused by rough handling (such as dropping or hitting with hammer) may cause a scar on the raceway which will hinder smooth movement and shorten expected travel life. Also be aware that such impact may damage the resin parts. Never try to disassemble the product. Doing so may cause an entry of contamination or deterioration of assembly accuracy. The blocks or the outer cylinders may move just by tilting the rail or the shaft. Be careful not to let them fall off from the rail or the shaft by mistake. The accuracy on the mounting surface and parallelism of the shafts after assembly are important factors for exploiting the performance of the linear system. Exercise adequate care for mounting accuracy.(2) Notes on Use Be careful not to let dust or foreign substances enter the linear system during use. When using the linear system under an environment where dust or coolant may scatter, protect the system with a bellow or a cover. When the NB linear system is used in a manner that its rail is fixed to the ceiling and downward load is applied to the block(s) or the outer cylinder(s), if the block or the outer cylinder breaks, it may fall off from the rail and drop to the floor. Provide additional measures for preventing dropping of the block or the outer cylinder, such as a safety catch. (3) Instructions in considering the "Life Span" of a Linear System When the load applied to a block or an outer cylinder exceeds 0.5 time of the basic dynamic load rating (P > 0.5C), the actual life of the system may become shorter than a calculated life span. Therefore, it is recommended to use the system with 0.5C or lower. In the repetition of very small strokes, where a rolling element, such as a steel ball or a cylindrical roller, makes only half-turns or smaller, early wear called fretting occurs at the contact points between the rolling element and the raceway. There is no perfect measure for this, but the life of the system can be extended by using anti-fretting grease and moving the blocks or the outer cylinders for the full stroke length once in several thousand times of use.Anti-fretting grease is available at NB. Please use it before using the linear system with very minute stroke cycles. Eng-23