Vesconite Bearings continues to expand use of bushings in Archimedes screw applications
02 June 2024

There is a growing adoption of Vesconite and Vesconite Hilube no-swell, wear-resistant lower bushings in Archimedes screw applications. 

Vesconite and Vesconite Hilube bushings with inner diameters of 100 mm, 115 mm, 130 mm, 165 mm and 202 mm have been successfully installed in various operations. These bushings have been recorded as supporting rotational speeds of 110 rpm, 100 rpm, 20 rpm, 90 rpm and 47 rpm, respectively. 

The bushings have assisted in bearing the weight of the Archimedes screws – the helical screws that have operated at an inclined angle (typically between 30º and 45º) – and allowed them to convey the desired medium to a higher site than the one at which the conveyed medium was located. Many of the cases in which Vesconite and Vesconite Hilube have been used have been subjected to significant loads, including at one notable installation where, even without the conveyed medium, the shaft with the hub and base plate weighed 723 kg and the screw body weighed 7.6 tons.

In collaboration with its clients, Vesconite Bearings has been instrumental in assessing the suitability of its bushing materials and designing bushings that meet specific application requirements. 

“Vesconite and Vesconite Hilube lower bushings for Archimedes screws have to-date predominantly been used in potable water and wastewater applications,” informs application engineer Jandri Ueckermann. 

“However, they can be used in other screw conveyor applications, which extend to industrial uses, including grain conveying, among other applications,” she notes.

Vesconite and Vesconite Hilube bushings demonstrate:

• Low friction: These materials reduce wear and extend component life.

• Internal lubrication: Eliminates the need for external lubrication, simplifying maintenance.

• Low swell: Ensures dimensional stability even in moist conditions.

• Close running clearances: Allows for precise engineering and improved efficiency.

• Abrasion resistance: Enhances durability in abrasive environments.

• No galvanic corrosion: Allows for use in potable and wastewater applications and extends the life of the bushing.

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