What are the pros and cons of ball screws?
Pros:
Higher positional accuracyHigh speeds and lead options
Require less torque so smaller, cheaper motors
Energy efficient
Low friction
Run at low temperatures for high duty
Adjustable for preload and axial play
Cons:
Require braking systems
Require grease or oil lubrication
No self-locking
Less shock-resistance than lead screws
More expensive
What are the pros and cons of lead screws?
Pros:
Lower cost than ball screwsSelf-locking (dependant on thread angle)
Do not always require braking system
Can be self-lubricating bronze or plastic nuts
Can carry heavier loads than ballscrew screw counterparts
Cons:
Require more regular maintenance, costing more long-term
Less efficient; require greater torque/larger motor
Higher friction, thus run at a higher temperature
Not as well suited to high-speed applications or continuous/long cycle times
More axial play/lower position accuracy