Bearing Selection

Single-row deep groove ball bearing:
Both radial and axial loads, low torque. Suitable for applications requiring high speeds and low power loss.

Magneto Bearing:
Outer ring can be removed for the ease of mounting. Suitable for small applications, pressed brass cages are generally used.

Single-Row Angular Contact Ball Bearing:
Take both axial and radial loads in single direction. The larger the contact angle, the higher the axial load capacity. However, smaller contact angles are preferred for high speed operation.

Four-Piont Contact Vall Bearing:
Separable inner and outer ring. Can take axial loads in both directions only. Equivalent to face-to-face or back-to -back angular contact bearings.


Duplex Bearing:
A combination of two radial bearings. Can be combined face-to-face, back-to -back or facing the same direction(DT). DT is used when there is strong axial load.


Self-Aligning Ball Bearing:
Correction of minor angular misalignment of the shaft and housing caused by machining or mounting error.

Thrust Ball Bearing:
Washer-like bearings, axial load only.

Load Rating:
The rate of radial bearing is defined as the constant central radial load applied on bearing with stationary outer rings that the inner rings can endure for a rating life of one million revolutions.

The actual load on the bearing would be greater than those calculated, thus a load factor is required to be taken in consideration. For smooth operations such as electric motors, the factor is typically 1 to 1.2, however, considering the shock and vibration the ambulance might brought, this value could boost up to 1.5 to 3.  When a 10N axial force is applied, the bearing will withstand roughly 15N. If the ball bearings are on an angle, the effective load centre will be shifted, thus the overall load will change according to the angle.