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Koyo Technical Information
a. Arrangement in which fixed and free sides are distinguished
| Example | Bearing arrangement | n | Fr | Fa | Q | Application example | |
|---|---|---|---|---|---|---|---|
| Free side | Fixed side | ||||||
| 1 |  Angular contact ball bearing (Back-to-back arrangement) |
 Cylindrical roller bearing (NU type) |
High | Normal | Normal | Low | Motors |
n : Rotational speed; Fr : Radial load; Fa : Axial load; Q : Aligning capability
b. Arrangement in which fixed and free sides are not distinguished
| Example | Bearing arrangement | n | Fr | Fa | Q | Application example |
|---|---|---|---|---|---|---|
| 2 |  Angular contact ball bearing (Back-to-back arrangement)  Angular contact ball bearing(Face-to-face arrangement) |
High | Light | Normal | Low | Machine tool spindles |
| 3 |  Angular contact ball bearing(Back-to-back arrangement) |
High | Normal | Normal | Low | Machine tool spindles |
n : Rotational speed; Fr : Radial load; Fa : Axial load; Q : Aligning capability
c. Application to vertical shafts
| Example | Bearing arrangement | n | Fr | Fa | Q | Application example |
|---|---|---|---|---|---|---|
| 4 |  Fixed sideAngular contact ball bearing (Back-to-back arrangement) |
High | Normal | Normal | Low | Vertical motors |
n : Rotation speed; Fr : Radial load; Fa : Axial load; Q : Aligning capability
d. Gear transmission two-point-support system
A shaft is generally supported by two or more bearings. A machine is a collection of these assemblies.
As a shaft model, the gear transmission mechanism is the simplest and most common. The Menu entitled Two-point-support System is available, by which loads the bearing is exposed to, service life, safety factor can be obtained based on gear specifications, location, and operation conditions.
