Knurled Dowel Pin

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Knurled conical stainless steel locating pins (knurled pins) are key positioning components in the field of precision manufacturing, designed to solve the alignment problems in high-precision equipment assembly. As a professional manufacturer, we use high-quality stainless steel materials with advanced knurling technology to ensure that the products have excellent performance in positioning accuracy, corrosion resistance, and durability.

Product material characteristics

High-strength stainless steel: 304 or 316 materials are selected, which can provide corrosion resistance that is 3 times better than ordinary carbon steel, and have been verified by a 48-hour salt spray test, especially suitable for use in humid and chemically corrosive environments.

Heat treatment process: Some models are vacuum quenched, with a surface hardness of HRC50-55, which greatly improves the wear resistance of the product.

Product Picture

 

Structural advantages

Conical design: 1-3° precision cone angle, can achieve a tolerance of ±0.05° to achieve self-guided positioning, effectively compensate for installation errors of ±0.2mm, and reduce the difficulty of assembly.

Double knurling texture: 45° cross knurling structure can effectively provide 360° anti-slip protection, increase the friction coefficient by 40%, and prevent the slight displacement of the workpiece

Surface treatment process
Hard chrome plating layer: thickness 3-5μm, surface roughness ≤Ra0.4μm, with both anti-rust and friction reduction characteristics.

Passivation treatment: Standard configuration improves the density of chromium oxide film, eliminates metal ion precipitation, and meets the

cleanliness requirements of medical and food equipment.

Raw Material

Cold Forging

Threading

Auto Lathe

Auto Lathe

Table Lathe

CNC Lathe

Quality Checking

Inspection

Packing

Core product features

High-precision positioning capability
Strict tolerance control: The diameter tolerance of the press-in section is maintained at m6 level, suitable for H7 level base hole, and the repeat positioning accuracy is ≤0.01mm7.

Dual reference structure: Optional step-type design, dual positioning is achieved through the shoulder limit surface + cone surface, eliminating axial movement.

Corrosion resistance and durability: Passed 1000 hours of wet heat test, no rust failure, and the life span is 5 times longer than that of carbon steel products.

Strong anti-vibration and anti-loosening performance: Knurling + taper double locking: Vibration tests show that it can withstand ≥50 hours of continuous vibration without preload.

Multifunctional head options: Provide external thread type, wrench hole type, hexagonal head type installation interface, adapted to the locking requirements of different working conditions

Typical application scenarios

Guide rail positioning of automated equipment: specially designed for fixing the base of linear guide rails, the cone pin + knurling structure offsets the micro displacement of high-frequency start and stop.

Precision alignment of mold manufacturing: Stepped knurled pins achieve precise positioning of the three plates of the mold and reduce mold impact damage. Supports rapid replacement of structures and reduces maintenance time by 60%.

Clipers Micrometer

Torque

Depth Micrometer

Plug

Thread Guage

Ring Guage

Hardness Tester

Projector

Salt Spray Testing

Heavy machinery shear connection: High-strength stainless steel pins are used for hinge positioning of engineering machinery, replacing traditional clamp structures and reducing weight by 30%.

Sterile environment of medical equipment: Mirror polishing + passivation pins are used for positioning the rotating bracket of CT machines.

Microelectronic assembly fixture: Miniaturized series with ceramic bushings to solve the problem of thermal deformation compensation during hot pressing welding of PCB boards.

Customized service
Material customization: support 303/316L stainless steel material customization (and other special materials)

Size customization: support diameter range from φ1~φ30mm, step type/threaded hole type/wrench slot type customization

Why choose us?

Through the full life cycle quality management of knurled pin products, we ensure that every link from raw material procurement to finished product delivery meets the most stringent industrial standards, providing reliable fastening solutions for your critical equipment. We will continue to be committed to providing the most reliable fastening solutions to customers around the world. Whether you need standard specifications of anti-loosening screws or face special application challenges, our engineering team can provide professional support.