S-98940A749 1 1/4"-4 x 3 ft. Precision Acme Lead Screws and Nuts
Precision Acme Lead Screws and Nuts
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Basic Information
Thread Parameters
Dimension Parameters
Lead Screw Specific Parameters
Load & Performance Parameters
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Key Features & Benefits at a Glance
- Exceptional positioning accuracy with ±0.009" per foot travel tolerance for reliable, repeatable motion control in automated systems.
- Superior strength and wear resistance from hardened 4140 alloy steel construction, providing a high tensile strength of 125,000 psi for demanding loads.
- Enhanced corrosion protection with Black-Oxide surface treatment, extending service life in industrial environments.
- Optimized left-hand thread design for specialized applications requiring reverse-direction linear motion or counter-rotational assembly.
- Consistent 0.25" travel per revolution ensures predictable linear advancement for precise speed and positioning calculations.
- Reliable Class 2C thread fit offers optimal clearance for smooth operation with ACME nuts, reducing binding and wear.
- Compliance with RoHS 3 standards ensures environmental responsibility and meets international regulatory requirements.
Professional Applications & Engineering Value
This left-hand Acme lead screw delivers critical performance in industrial automation, CNC machinery, and precision positioning systems where reverse-motion functionality is essential. Manufactured from hardened 4140 alloy steel with a Black-Oxide finish, it resists corrosion and maintains structural integrity under high-stress conditions. The Class 2C thread fit and fully threaded Acme design provide smooth, low-friction movement with minimal backlash, solving common issues of premature wear and positional inaccuracy. Its Brinell 271 hardness and robust construction make it ideal for heavy-duty applications in manufacturing, packaging, and material handling equipment, ensuring long-term reliability and reduced maintenance cycles.
Specification Summary & Compliance
This precision Acme lead screw features a 1 1/4"-4 thread size with Class 2C thread fit per ANSI/ASME B1.5 standards, ensuring dimensional accuracy and compatibility. It provides a consistent travel distance of 0.25" per turn with an accuracy of ±0.009" per foot. The component is fully compliant with RoHS 3 (2015/863/EU) regulations, confirming its adherence to strict environmental and safety standards for industrial use.
