S-98940A637 3/4"-6 x 3 ft. Precision Acme Lead Screws and Nuts

Key Features & Benefits at a Glance

• Exceptional Precision: Maintains ±0.009" per foot accuracy for reliable, repeatable linear motion in demanding applications.
• Superior Durability: Made from hardened 4140 alloy steel with a Brinell 271 hardness, resisting wear and extending service life.
• High Load Capacity: 125,000 psi tensile strength ensures robust performance under significant mechanical stress.
• Optimized Thread Design: Class 2C ACME threads provide smooth engagement with nuts, reducing backlash and improving efficiency.
• Corrosion-Resistant Finish: The black-oxide surface treatment offers enhanced protection against rust in industrial environments.
• Consistent Motion Transfer: A 0.167" travel distance per turn with a single start thread delivers predictable and controlled linear movement.
• Environmental Compliance: RoHS 3 compliant, meeting strict EU directives for use in regulated industries.

Professional Applications & Engineering Value

This 3/4"-6 ACME lead screw is engineered to solve core challenges in precision linear motion systems. The combination of hardened 4140 alloy steel and a black-oxide finish provides exceptional resistance to abrasion and corrosion, crucial for CNC machinery, automated positioning tables, and high-cycle industrial actuators. The Class 2C thread fit and ±0.009" per foot accuracy minimize positional error and backlash, ensuring smooth operation and repeatability in applications where precision is non-negotiable. Its fully threaded, right-hand design and high tensile strength make it a reliable component for transferring motion and handling thrust loads in demanding environments, reducing maintenance downtime and improving overall system longevity.

Specification Summary & Compliance

This precision ACME lead screw adheres to critical specifications for reliable performance. The thread system is defined by a 3/4"-6 size with a Class 2C thread fit, ensuring proper engagement and dimensional consistency. It is manufactured from black-oxide 4140 alloy steel, heat-treated for enhanced mechanical properties. The component is fully compliant with RoHS 3 (2015/863/EU) directives, confirming its suitability for use in markets with strict environmental regulations.