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Precautions

Design

(1) If a ball screw of which left shaft end (opposite driven side) is the shape I, and is supported with the “fixed-fixed"
supporting method, you should be aware that the operating life of support bearings may drop due to thermal
expansion of the screw shaft, depending on usage conditions. In this case, you should consider a structure
that can absorb thermal expansion of the screw shaft if necessary. Please consult with NSK for a detailed
examination.

(2) If using an NSK linear guide, the maximum speed of a linear guide of standard specifications under ordinary
conditions is limited to 100 m/min. A linear guide with high-speed specifications is available if higher operating
speed is required. Contact NSK for further information.

(3) For general precautions concerning ball screws, please see NSK Catalog No. E3162 "Precision Machine
Components."

Usage and handling

Ball screws are precision products and should be treated as follows:

[Lubrication]

(1) Compact FA Series ball screws are packed and coated with lubrication grease at the Check lubrication
factory, and require no further lubrication under ordinary circumstances. If the surface of
the grease becomes contaminated with dirt and metal powder under operation, clean it
with white kerosene and replenish with new grease of the same kind through the oil hole
(grease fitting) on the ball nut. Avoid mixing different types of grease.

(2) Lubricant should be checked after the first 2 to 3 months of operation. If excessively
dirty, we recommend you wipe away the old grease and replenish with a generous
quantity of grease.
After that, grease should be checked and replenished once a year under ordinary
circumstances, but the period may vary depending upon the service environment.

[Handling]

(1) Never disassemble the ball screw, otherwise dirt may contaminate the inside of the unit
and affect precision or result in equipment failure.

(2) Compact FA Series ball screws incorporate a new ball re-circulation system.

Consequently, only NSK authorized plants should conduct disassembly and reassembly.

If the nut accidentally comes off the screw shaft or is dropped, NSK will check precision, Do not disassemble

problems or perform repairs at your expense.

(3) When the ball screw is erected upright, the screw shaft or nut could fall by force of

its own weight and result in injury. If dropped, the ball grooves could be dented or re-

circulation parts damaged, resulting in loss of function. This would require the ball screw

to be inspected by NSK. If so, be sure to send the ball screw to NSK and we will check it

for a fee. Beware of dropping

[Usage]

(1) Ball screws should be used in a clean environment. The ball screws should be provided Dust control
with a dust cover to prevent the entry of debris such as dust and metal powder. If foreign
matter is allowed to contaminate the ball screw, this could not only cause the ball screw
to lose some of its function, but also result in clogging and damaging the re-circulation
system parts, or cause the table to fall or a similar serious accident.

(2) Compact FA Series ball screws are designed to be used in a service temperature 80°C
environment of 80°C or lower. Do not allow the service temperature limit to be exceeded. Max

In some cases, using ball screws in temperatures above 80°C might lead to damage of

re-circulation system parts or seal parts. Contact NSK if 80°C must be exceeded. Caution max. temperature