S-98940A623 1/2"-8 x 3 ft. Fast-Travel Precision Acme Lead Screws and Nuts

Key Features & Benefits at a Glance

• Enhanced Durability & Corrosion Resistance: Black-oxide finish on hardened 4140 alloy steel provides superior protection against wear and environmental factors, extending service life in demanding industrial settings.
• High-Precision Motion Control: Maintains tight travel accuracy of ±0.009" per foot, ensuring reliable positioning and repeatability for automated systems and CNC machinery.
• Rapid Linear Travel: With 0.25" travel per turn and a 2:1 speed ratio, this screw enables faster movement and improved efficiency in fast-travel applications.
• Robust Load-Bearing Capacity: High tensile strength of 125,000 psi and Brinell 271 hardness allow for handling significant axial loads without deformation.
• Optimized Thread Engagement: Class 2C thread fit and two thread starts provide smoother operation, reduced backlash, and better power transmission in lead screw assemblies.
• Versatile & Reliable Design: Fully threaded, right-hand Acme thread configuration ensures compatibility with standard nuts and consistent performance across various motion control systems.
• Environmental & Regulatory Compliance: RoHS 3 compliant, meeting international standards for restricted substances, making it suitable for global supply chains.

Professional Applications & Engineering Value

This 1/2"-8 ACME lead screw is engineered to address critical challenges in precision motion systems, such as minimizing positional error and maximizing operational speed. Constructed from black-oxide 4140 alloy steel and hardened for durability, it resists wear in high-cycle applications like CNC machining, 3D printing, and automated material handling. The Acme thread type with a Class 2C fit ensures low friction and efficient power transfer, while the 2:1 speed ratio and 0.25" travel per turn enable rapid linear movement. Ideal for fast-travel precision setups, this component reduces maintenance needs and enhances system reliability by maintaining ±0.009"/ft accuracy under load, supporting industries that demand consistent performance and long-term value.

Specification Summary & Compliance

This lead screw adheres to inch system measurements with a Class 2C thread fit for precise engagement. It meets dimensional standards for Acme threading, including 1/2"-8 size and right-hand direction. Manufacturing follows industry practices for hardened steel components, with a tensile strength of 125,000 psi and Brinell 271 hardness. Compliance includes RoHS 3 (2015/863/EU), ensuring it is free from hazardous substances and suitable for various international engineering applications.