S-98940A418 1"-4 x 6 ft. Precision Acme Lead Screws and Nuts

Key Features & Benefits at a Glance

• Exceptional dimensional stability with ±0.009" per foot accuracy for reliable, repeatable linear motion in precision machinery.
• Superior wear resistance and corrosion protection from the hardened Black-Oxide 4140 Alloy Steel, extending service life in harsh industrial environments.
• High load-bearing capacity with a tensile strength of 125,000 psi and Brinell 271 hardness, ensuring durability under significant mechanical stress.
• Predictable and efficient linear travel of 0.25" per single revolution, providing consistent speed and positioning control.
• Reliable anti-backlash performance with the Class 2C thread fit, minimizing play for precise motion control applications.
• Versatile left-hand threading enables unique mechanical designs and reverse motion operations where standard right-hand threads are unsuitable.
• Full regulatory compliance with RoHS 3, making it suitable for use in regulated industries and global markets.

Professional Applications & Engineering Value

This left-hand Acme lead screw is engineered to solve critical challenges in industrial automation and precision machinery. The hardened 4140 alloy steel construction with a black-oxide finish provides excellent resistance to wear and environmental corrosion, making it ideal for CNC systems, lifting equipment, and packaging machinery that operate under high loads and in demanding conditions. The Class 2C thread fit and ±0.009" per foot accuracy ensure minimal backlash and precise linear movement, which is crucial for applications requiring repeatable positioning. Its left-hand thread direction offers design flexibility for complex mechanical assemblies where reverse motion is required, providing engineers with a reliable component for specialized motion control solutions.

Specification Summary & Compliance

This precision Acme lead screw adheres to Class 2C thread fit standards, ensuring proper engagement with mating nuts. It features a 1"-4 Acme thread with a single thread start and a 1:1 speed ratio. The component is fully threaded over its 6 ft. length and provides a consistent travel distance of 0.25" per turn. It is fully compliant with RoHS 3 (2015/863/EU) regulations, confirming its suitability for use in environmentally conscious and regulated industrial applications.