The machinery, supplied by Finlay Plant Northern, is being used to process agricultural lime and aggregates at the Bishop Middleham magnesium limestone quarry near Durham.
Both machines are processing 150 tonnes of product an hour at sizes ranging from 3mm up to 40mm.
The four-way split screen of the 694+ Supertrak means that the machines can produce single size products to a high volume, to drive up processing rates.
Quarry operations manager Eddie Collins said: “We’ve hired Terex Finlay plant in the past, but took the decision this time to purchase the machines.”
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