NOB Alloy Steel Fixed Eye Bolt — Grade G80 Material, Rigorous Certification, Long-Lasting Durability
Classification:
Time：
2025-12-08
Product Overview
NOB alloy‑steel fixed lifting rings are premium core lifting components distributed by Chuanshang Mechanical Equipment (Wuhan) Co., Ltd. Crafted from G80‑grade high‑strength alloy steel, they combine integral forging with precision heat‑treatment processes and employ bolted fastening in place of traditional welding, delivering three key advantages: exceptional load capacity, flexible adaptability, and long‑term durability. The product range covers rated loads from 0.5 t to 250 t and has earned 12 international safety certifications, making it suitable for diverse industries including aerospace, wind energy, automotive manufacturing, and port & marine applications. From the handling of precision equipment to the lifting of heavy structural components, NOB lifting rings provide safe, efficient solutions for every application scenario.
Core Advantage: The robust strength of alloy steel material
1. Military-grade material, offering both superior strength and toughness.
The body is made of G80‑grade special alloy steel (with 42CrMo alloy structural steel used for certain heavy‑duty models), and undergoes integral forging followed by quenching and tempering, achieving a tensile strength of up to 1300 MPa. The fracture load exceeds four times the rated value, while the lateral‑pull‑type products offer a 40% increase in lateral load capacity.
Tolerance – Withstands extreme temperatures from -40°C to 200°C; remains crack‑free at low temperatures and retains its shape at high temperatures. In harsh environments such as dusty mines, humid ports, and salty marine atmospheres, its service life is 40% longer than that of standard lifting rings.
100% magnetic particle testing (MT) and ultrasonic testing (UT) are performed, with tensile‑break tests conducted on a sample basis for each batch, effectively eliminating internal defects such as cracks and porosity and ensuring a fully controllable safety margin throughout the process.
2. Precision-engineered structure, flexibly adaptable to complex scenarios
The bolt‑fastening design eliminates the need for welding, increasing installation and removal efficiency by 50%. The threads are inspected using 6G go/no-go gauges and are compatible with deep holes, through holes, and precision threaded holes. When installed in soft materials, the effective thread engagement length reaches twice the diameter; in steel, it reaches 1.5 times the diameter.
The swivel model features high-precision ball bearings with a friction coefficient of 0.005 and a self-lubricating system, enabling 360° omnidirectional rotation plus 180° tilting, with an angular error of ≤±0.5°. This significantly reduces sling entanglement and shortens positioning time, making operations in confined spaces more efficient.
Some models feature a dual‑lock anti‑detachment mechanism combining a snap‑on latch and a bolt, providing real-time alerts for potential detachment risks and reducing accident rates to near zero. The NP‑Y eye‑type version with a stop plate effectively prevents unintended rotation during lifting, making it ideal for precision lifting applications such as mold handling.
3. Rigorous testing ensures long-lasting durability and peace of mind.
Through a 2.5‑times working‑load test and 20,000 fatigue cycles at 1.5 times the rated load, the salt‑spray corrosion‑resistant coating achieved a durability of 480 hours, with a service life more than twice the industry average.
The sealed structural design effectively prevents the ingress of dust and contaminants, while the maintenance-free rotating components ensure an extended service life. In the Beihai wind power project, the M48 model has achieved five years of stable operation with “zero maintenance.”
The product clearly indicates its rated load and lifting angle to prevent misoperation, and is accompanied by a comprehensive quality traceability report, ensuring that each unit can be traced back to the production and testing stages.
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Address: Beigang Industrial Park, No. 28 Shucheng Road, Hongshan District, Wuhan City, Hubei Province, China
Mobile: 86-18674085456
Phone: 86-027-88137773
E-mail: liyanhe@noblifting.com
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