S-98940A733 5/8"-8 x 3 ft. Precision Acme Lead Screws and Nuts

Key Features & Benefits at a Glance

• Exceptional dimensional stability with ±0.009" per foot travel accuracy for reliable, repeatable positioning in automated systems.
• Superior strength and durability from hardened 4140 alloy steel, offering a high 125,000 psi tensile strength to withstand heavy loads and resist wear.
• Enhanced corrosion resistance and reduced maintenance provided by the black-oxide surface treatment on the robust steel.
• Optimized for non-reversing and specialized motion control with its left-hand Acme thread, preventing unintended loosening in specific assembly setups.
• Consistent, smooth power transmission ensured by the Class 2C thread fit, which provides necessary clearance for efficient operation with minimal backlash.
• Long service life under demanding conditions due to the material's Brinell 271 hardness, resisting deformation and extending component lifespan.
• Safe for use in regulated industries as it is RoHS 3 compliant, meeting strict environmental and safety standards.

Professional Applications & Engineering Value

This 5/8-8 Left Hand Acme Lead Screw is engineered to solve critical challenges in precision motion control and linear actuation systems. The use of hardened 4140 alloy steel with a black-oxide finish provides exceptional resistance to wear and corrosion, making it ideal for harsh industrial environments like packaging machinery, CNC equipment, and heavy-duty automation. The left-hand Acme threading is specifically valuable in applications requiring a reverse-thread mechanism to prevent accidental disengagement or for use in paired systems with right-hand screws. Its fully threaded design and high tensile strength ensure reliable power transmission and positioning accuracy, reducing system downtime and maintenance costs for engineers and OEMs.

Specification Summary & Compliance

This lead screw adheres to inch system measurements with a Class 2C thread fit per Acme standards, providing the specified clearance for smooth operation. It is manufactured to deliver a precise travel distance of 0.125" per turn with an accuracy of ±0.009" per foot. The component is RoHS 3 (2015/863/EU) Compliant, ensuring it meets current environmental directives for hazardous substance restrictions.