LM Guide Unit
During actual operation, damage may be caused by an unexpectedly large load acting on the LM Guide that is caused in particular by sudden starting and stopping or a large moment created by an overhang. Therefore, a static safety factor f S must be considered. The static safety factor f S is derived from the relationship between the applied load and the basic static load rating. The guidelines for the static safety factor based on operating conditions are given in Table 1 .
Ball Screw Unit/Bearing Unit(Fixed Side)
For the ball screw and the bearing, a static safety factor f S based on the relationship between the calculated maximum axial load and the static load rating must be considered. Vibrations, impacts, or inertia due to starting and stopping may result in an unexpectedly large load. Therefore, please confirm that a suffi cient static safety factor has been ensured when selecting a model. The guidelines for the static safety factor based on operating conditions are given in Table 1.
Standard Values for the Static Safety Factor (fS)
- 1 The basic static load rating is a static load with a constant direction and size where the sum of the permanent deformation of the rolling element and that of the raceway on the contact area under the maximum stress is 0.0001 times the rolling element diameter.
- 2 Vibrations and impacts are typically caused by factors such as acceleration and deceleration, sudden starting and stopping, vibrations and impacts from an external machine, and changes in processing power over time.
