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Custom gear units drive log washers

02 August 2017

Renold Gears has designed a heavy-duty, custom gearbox solution for a manufacturer of a special type of coarse material washers known as log washers. These huge rectangular boxes, or troughs, are usually fabricated from steel plate, containing two steel shafts with paddles attached along their length.

Known as log shafts, the steel shafts are aligned parallel to each other within the box, and as they turn the paddles intermesh. The turning and intermeshing paddles facilitate material-on-material cleaning, with water jets, and crush and convey material along the box to the exit point. 

The custom gearbox designed by Renold Gears has a single input shaft with counter rotating double output shafts to drive the two logs. The internal gearing was designed to ensure the logs are aligned perfectly and do not come into contact with each other during operation. As well as providing the torque to drive the machine the gearbox acts as a bearing support to support the two logs. They will be supplied in two sizes to match the centres of the logs and the power of the machine.

The gearboxes were amongst the first to be produced on Renold's new £1.8 million, state-of-the art, Burkhardt + Weber machining centre.