These are self-aligning bearings used for transporting film sheets. Since the rollers are fully submerged in liquid, there was an inquiry regarding whether it would be possible to use bearings made of materials with chemical resistance, such as plastic or ceramic.
The layout of the transport line can be imagined as follows:
Initially, the design called for radial bearings, but because the film sheet’s tension could cause slight bending in the rollers, we proposed self-aligning bearings to ensure proper alignment even when deflection occurs.
However, standard self-aligning bearings exceeded the permissible load, so we enhanced load-bearing capacity with the dual-layer structure shown in the image.
In film sheet transport lines with upper and lower rollers, tension from the sheets often creates these kinds of cases. While tensions like this are of no concern when using metal bearings, they can lead to uneven wear or rotational issues in plastic bearings. This is due to the lower load-bearing capacity of plastic bearings compared to metal bearings.
In such cases, using self-aligning bearings can often resolve the issue, so please feel free to contact us if you are considering plastic bearings for upper and lower roller applications.
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・Self-aligning Ball Bearing |
