A screw conveyor arrangement is configured to convey a material, for example a food powder, in a processing plant. The screw conveyor arrangement comprises a casing with an internal channel, and a helical screw in the channel. A drive unit is releasably connected to a first portion of the casing to engage the helical screw. A support unit is attached to the casing and the drive unit to define a pivoting movement of the drive unit away from the first portion when the drive unit has been released from the casing. The support unit facilitates handling of the drive unit during maintenance and service, for example cleaning, and allows the drive unit to be swung away to provide access to the helical screw and the channel. The support unit may be provided for attachment to existing screw conveyors.