Right-hand screws are simply positive threads. Determining the helix direction of a ball screw is exactly the same as with ordinary screws: those that advance clockwise are called right-hand (positive threads), and those that advance counterclockwise are left-hand (reverse threads). Like unscrewing a water bottle cap, right-hand screws have the following characteristics:
The thread slopes upwards and to the right.
Clockwise rotation generates axial thrust.
They account for over 80% of the market supply.
Why are right-hand screws more common? This mainstream design is no accident:
Ergonomic: Clockwise rotation is more natural when operating with your right hand.
Equipment compatibility: Matches the default rotation direction of most motors.
Easy maintenance: Maintenance personnel can operate without special training.
Special applications of reverse threads: Left-hand screws actually have advantages in certain situations:
Dual screw synchronization mechanism: Prevents loosening on one side.
Space-constrained situations: Optimizes equipment layout.
Reverse self-locking requirements: Some lifting mechanisms require counterclockwise locking.
Special transmission system: Works with gear sets to achieve specific motion trajectories.