Right and Left Hand Screws Conveyors

A conveyor is either right hand or left hand depending on the form of the screw is easily determined by looking at the end of the screw.

The screw pictured to the left has the flight helix wrapped around the pipe in a counter –clockwise direction, or to your left. Same as left hand threads on bolt. This is termed a RIGHT hand screw.

The screw pictured to the right has the flight helix wrapped around the pipe in a clockwise direction, or to your right .same as right hand threads on a bolt. This is termed a RIGHT hand screw.

A conveyor screw viewed from either end will show the same configuration. If the end of the conveyor screw is not readily visible, then by merely imagining that the flighting has been cut, with the cut end exposed, the hand of the screw may be easily determined.

The above diagrams are a simple means of determining screw rotation. When the material flow in the direction away from the end being viewed a R.H screw will counter clockwise and L.H screw will turn clockwise rotation as shown by the arrows.