The main rakearm on a filter stirs the gold bearing solution at the bottom of the filter. The bush holds the rakearm in place. This is a slow moving application turning at ±0,3 RPM.

Previously white metal was used as a liner. In a test application, two Vesconite bushes, outside diameter 600 mm (23.6") by inside diameter 540 mm (21.3") and 57 mm (2.24") in length were shaped to size and fitted into the housing. The bushes were then machined to the final required size.

The advantages of fitting Vesconite include:

• Easy replacement
• Less downtime
• Low coefficient of friction
• Long life
• Low cost