Oxidation Black Round Nut Locking Nut Anti-Loosening for Enhanced Durability

• Customization: Available
• Material: Carbon Steel
• Type: Round Head
• Model NO.: 1-1
• Connection: Common Bolt
• Head Style: Round
• Standard: DIN
• Grade: 8.8
• Surface Treatment: Oxidation Black
• Product Grade: a-Level
• Thread Type: Full Thread
• Applicable Industries: Construction, Industry
• Transport Package: Container
• Specification: 1-100
• Trademark: Huilin
• Origin: Handan, Hebei
• HS Code: 0101101010
• Production Capacity: 50000

Product Description

Introducing the Oxidation Black Round Nut Locking Nut, a marvel of engineering designed to revolutionize the realm of anti-retreat fasteners with unparalleled durability.

The Anti-Loosening Round Nut, also known as a Round Nut or Anti-Loosening Round Nut, is a specialized fastener that ensures secure locking through a sophisticated mechanical or friction-based anti-loosening mechanism. This innovative nut is predominantly used for the axial fixation of shaft components such as rolling bearings, providing steadfast prevention against loosening triggered by vibrations or impacts. Below, we unveil its core features and essential usage points:

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1. Basic Definition

Our Anti-Backlash Round Nut boasts a finely-crafted, thin-walled annular structure, featuring a precision-threaded inner hole ranging from M10 × 1 to M200 × 3. Its outer circle is marked by distinctive grooves or openings that collaborate seamlessly with a stop washer, colloquially named the 'Wang Ba pad.' The anti-loosening principle is ingeniously categorized into:

Mechanical locking: This method intricately interlocks the inner and outer teeth of the stop washer into the nut groove and shaft keyway, establishing a firm, rigid boundary.

Friction anti-loosening: Certain models incorporate an inventive wedge-shaped inclined surface design or are treated with engineering plastic coatings to amplify the friction between threads, as exemplified by HARDLOCK nuts.

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Structural Features

1. Slot Design:

Ingeniously engineered, the outer circle is adorned with equidistant open slots that harmonize with the outer teeth of the stop washer. Post-installation, the washer teeth are expertly bent, achieving a state of mechanical locking.

2. Material and Craftsmanship:

Crafted from Carbon Steel (45# steel) and subjected to rigorous heat treatment, the material attains a hardness of HRC35-45, rendering it ideal for general industrial scenarios.

Stainless Steel (304/316): Endowed with exceptional corrosion resistance, this material excels in humid or chemical-prone environments.

Surface Treatment: Options include blackening, galvanizing, or spraying with engineering plastics to significantly bolster wear resistance and rust prevention.

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3. Anti-Loosening Mechanism

1. Mechanical Locking Type:

Ingeniously secures the inner and outer teeth of the stop washer into the shaft keyway and nut groove, effectively restricting relative rotation between the nut and shaft. Ideal for environments with high vibration, such as elevators and mining machinery.

2. Friction Anti-Loosening Type:

Wedge Slope Design: Harnessing the power of an eccentric wedge-shaped contact surface between threads, this design uniformly distributes locking force, showcased in projects like Japan's Shinkansen, with outstanding anti-vibration performance.

Plastic Spraying Technology: This method involves spraying engineering plastic onto the threaded surface, resulting in elastic deformation and enhanced friction upon tightening, despite its limited temperature resistance (-50 ºC~120 ºC).

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4. Application Scenarios

Bearing Fixation: Expertly employed for the axial locking of rolling bearings, preventing any axial movement or drift.

Heavy Machinery: Essential for the shaft end fastening in mining equipment and bridge steel structures, designed to withstand formidable vibration loads.

Rail Transit: Integral to key components such as high-speed rail hubs and bogies, where wedge-shaped anti-loosening nuts ensure enduring stability and reliability.