Durable Round Nut Locking Nut Anti-Loosening Nut for Reliable Performance

• 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

Explore the marvel of advanced fastening technology with our meticulously engineered Anti-Retreat Round Nut.

The Anti-Loosening Round Nut, also revered as the round nut, is a specialized component designed to secure fasteners with utmost reliability through its mechanical or friction-based anti-loosening mechanisms. Primarily deployed for axial fixation of shaft components, such as rolling bearings, this ingenious nut prevents loosening caused by vibrations or impacts. Let us delve into its core features and pivotal usage points:

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1, Basic Definition

Crafted with precision, the anti-backlash round nut features a thin-walled annular structure. Its detailed design includes a fine threaded inner hole (ranging from M10 × 1 to M200 × 3), accompanied by a groove or opening on its exterior. It is engineered to function seamlessly with a stop washer, fondly known as the 'Wang Ba pad.' The anti-loosening principle is ingeniously categorized into two dynamic types:

Mechanical locking: This involves embedding the stop washer's inner and outer teeth into the nut groove and shaft keyway, thereby establishing a rigid limit.

Friction anti-loosening: Certain models incorporate a wedge-shaped inclined surface design or are coated with engineering plastic, enhancing thread friction (as seen in HARDLOCK nuts).

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Structural Features

1. Slot design:

The design boasts equidistant open slots on the outer circle, which seamlessly align with the stop washer's outer teeth. Post-installation, the washer teeth bend to achieve impeccable mechanical locking.

2. Material and craftsmanship:

Carbon steel (45 # steel): Post-heat treatment, the hardness achieves an HRC range of 35-45, making it ideal for general industrial applications.

Stainless steel (304/316): Its superior corrosion resistance makes it perfect for humid or chemical environments.

Surface treatment: Options such as blackening, galvanizing, or engineering plastic spraying are available to bolster wear resistance and prevent rust.

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3, Anti-loosening mechanism

1. Mechanical locking type:

Securing the stop washer's inner and outer teeth into the shaft keyway and nut groove respectively restricts relative rotation between the nut and shaft, ideal for high-vibration environments like elevators and mining machinery.

2. Friction anti-loosening type:

Wedge slope design: Employs the eccentric wedge-shaped contact surface between threads to distribute the locking force evenly (e.g., HARDLOCK nuts), showcasing exceptional anti-vibration properties. Adopted in high-profile projects like Japan's Shinkansen.

Plastic spraying technology: Engineering plastic sprayed on the threaded surface creates elastic deformation, raising friction when tightened. However, it has limited temperature resistance (-50 ºC to 120 ºC).

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4, Application scenarios

Bearing fixation: Ensures secure axial locking of rolling bearings, preventing unwanted shaft movement.

Heavy machinery: Essential for shaft end fastening in mining equipment and bridge steel structures, capable of withstanding high vibration loads.

Rail transit: Vital components like high-speed rail hubs and bogies utilize wedge-shaped anti-loosening nuts to maintain steadfast stability over time.