Eta Technology [P] Ltd manufactures Tappet End Grinding Machines for Engine Valves. Eta Technology [P] Ltd manufactures a wide range of special purpose machines, Electrical Upsetting Machines, Assembly Machines and Test rigs for auto components. Tappet End Grinding Machines for Engine Valves is a pendulum type machine in which the valve moves over a pasted disc this type grinding wheel capable of stock removal of up to 2mm in one stroke. It is fully automatic with chute loading and input length checking with 5 seconds floor to floor time.