Explanation of friction bearing technology for melt metering pumps

Bearings are one of the core components of melt metering pumps. Materials and designs must be carefully selected and coordinated to ensure the safe and efficient operation of the metering pump.

Usually, friction bearings are used for melt pump for extrusion. For this type of bearing, the inner diameter is slightly larger than the journal stored inside. The transported medium seeps into this small area through the lubrication groove, and through the lubrication groove, the medium in the bearing forms a hydrodynamic lubrication film. The shaft floats in the bearing. For friction bearings lubricated with media, it is necessary to ensure that the lubricating film does not tear. Otherwise, the shaft will no longer be lubricated and cause damage to the shaft and bearings. This type of damage is usually irreparable, requiring the replacement of bearings and shafts.

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