They produced the range of agricultural equipment, skimmers, excavators, cranes and draglines that were renowned for high quality and long life, typically over 20 years.

They diversified into equipment manufacture and in 1947 the company started producing the American brands of Koehring excavators under the Newton Chambers Koehring name,[2] and in 1958 they took over Ransomes & Rapier building excavators, drag-lines, port cranes and other construction equipment under the NCK-Rapier brand.

With the decline in coal and the improvements in hydraulic machines, the company diversified into light fabrication.

NCK launched a new model, the 90T HC90 Astra crane in 2000 but it was not successful, 3 units were manufactured and are owned by Delden CSE Ltd as part of their hire fleet.

SPW now runs an active spares and overhaul business for its cranes[3] and fabricates NCK plant to order as well as manufacturing traffic control and filtration equipment.