Design and manufacture of a 250 kW hydraulic power unit plus baseframe and hydraulic motors for mill inching drive (planetary gearbox free issued by Client). The design scope also included finite element analysis of the inching drive baseframes. Hydraulically the units featured a variable displacement, closed-loop, horsepower and pressure compensated pump as well as on-board air blast cooling. Fabricated fully in-house with a carbon steel baseframe, stainless steel 316 tank as well as assembly and full factory acceptance testing with Client.

The hydraulic drive offers the advantage of torque limiting of the output via pressure control, indefinite stall capability (adjustable), low torque and speed output during initial engagement of the coupling, pendant operated proportional control of the drive and static braking via wet disc brake (park brake only applied after unit is stationary).