S-91808A118 1 1/4"-4 Acme Lead Screws and Nuts
Acme Lead Screws and Nuts
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Basic Information
Thread Parameters
Dimension Parameters
Lead Screw Specific Parameters
Nut Parameters
Load & Performance Parameters
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Key Features & Benefits at a Glance
- High load-bearing capability with 64,000 PSI tensile strength, ideal for demanding mechanical systems
- Precise linear motion control offering 0.25" travel per turn for accurate positioning in automation
- Enhanced durability from Grade 2 carbon steel and Rockwell B85 hardness, resisting wear in continuous use
- Reliable left-hand thread design prevents loosening in counter-rotational applications, improving safety
- Class 2G thread fit ensures smooth engagement with ACME screws, reducing backlash and maintenance
- Hex nut configuration allows for easy installation and removal with standard tools, saving assembly time
- Environmental compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries
Professional Applications & Engineering Value
This ACME left hand thread hex nut is engineered to address challenges in heavy-duty linear motion systems, such as those in industrial machinery, lifting equipment, and precision actuators. The Grade 2 carbon steel construction provides excellent strength-to-weight ratio, while the Rockwell B85 hardness ensures long-term resistance to deformation under repetitive loads. The left-hand ACME thread is particularly valuable in applications where reverse rotation could cause standard nuts to loosen, enhancing operational safety. With a 0.25" travel per turn, it delivers consistent linear advancement, making it suitable for positioning systems requiring accurate movement control. The Class 2G thread fit maintains optimal clearance, reducing friction and wear in high-cycle environments, thereby extending service life and minimizing downtime.
Specification Summary & Compliance
This nut features a 1 1/4"-4 ACME left-hand thread with Class 2G fit per industry standards, ensuring dimensional accuracy and compatibility with corresponding lead screws. Manufactured from Grade 2 carbon steel, it meets specified mechanical properties including tensile strength and hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting use in environmentally conscious applications without hazardous substances.
