Lead Screw – Product Description

A Lead Screw (also known as a power screw or translation screw) is a mechanical threaded component designed to convert rotary motion into linear motion. Unlike a leadscrew, which is optimized for precise positioning, a lead screw typically features a lower thread accuracy and is used primarily for power transmission and load holding applications.

Key characteristics:

• Thread profile: Typically square, acme, or trapezoidal (metric)

• Converts rotational input into linear output with high efficiency

• Self-locking capability (depending on lead angle and friction)

• Simple construction with lower manufacturing cost than ball screws

• Suitable for moderate speeds and intermittent operation

Common thread types:

• Acme thread – Most common, offers good wear resistance and easy manufacturing

• Trapezoidal thread (metric) – Standardized European design with excellent load capacity

• Square thread – Highest efficiency but more difficult to manufacture

• Buttress thread – Designed for high thrust in one direction

Typical applications:

• Linear actuators and positioning stages

• CNC machinery and milling equipment

• 3D printers and desktop manufacturing

• Valve control and gate opening mechanisms

• Elevator and lift systems

• Automotive jacks and clamping devices

• Medical equipment and laboratory instruments

Materials:

• Carbon steel – General purpose

• Stainless steel – Corrosion resistance

• Bronze or brass – Low friction, wear resistance

• Nylon or plastic – Light duty, noise reduction

Key specifications:

• Diameter – Typically 6mm to 80mm

• Lead (linear travel per revolution) – 1mm to 25mm or more

• Length – Custom cut to application requirements

• Accuracy grades – From general purpose to precision ground

Advantages:

• Low manufacturing cost

• Self-locking (no brake required for vertical loads)

• Quiet operation

• Compact design

• High load capacity

Limitations:

• Lower efficiency than ball screws (typically 30-70%)

• Higher friction and wear at high speeds

• Requires lubrication for optimal performance

Available as standard rolled threads for general use or precision ground threads for higher accuracy requirements.