Chicago Screws with tooth

O processo de encabeçamento a frio é um dos novos processos para a maquinagem sob pressão com menos ou nenhum corte
metal. É um método de processamento que utiliza a deformação plástica do metal sob a ação de
forças externas e, com a ajuda de moldes, redistribui e transfere o volume de metal para formar
as peças ou os espaços em branco necessários. O processo de encabeçamento a frio é o mais adequado para a produção de
elementos de fixação, tais como cavilhas, parafusos, porcas, rebites, cavilhas, etc.

1. Definition & Primary Function

A Chicago Screws with tooth is a specialized variant of Chicago fastener featuring:

• Serrated flange teeth (typically 8-16 teeth)

• Two-piece threaded assembly (male screw + female barrel)

• Permanent-lock design that bites into materials when tightened

Primarily used for vibration-proof fastening in high-stress applications where standard Chicago screws might loosen.

2. Key Components

A. Male Component

• Slotted or hex drive head

• Machine threads (usually #10-24 or 1/4″-20)

• Hardened steel construction

B. Female Barrel

• Toothed flange (teeth angle: 30-45°)

• Internal matching threads

• Barrel length options: 1/4″ to 1″

3. Unique Features

• Self-locking teeth: Cut into material surface when torqued

• Anti-rotation design: Prevents barrel spinning

• Material-gripping capability: Works with:

  • Leather (8oz+ recommended)

  • Wood (hardwoods preferred)

  • Plastic (ABS, polycarbonate)

  • Composite materials

6. Industrial Applications

• Motorcycle/ATV components (vibration-prone areas)

• Industrial equipment panels

• Heavy-duty leather goods (saddles, tactical gear)

• Outdoor signage (wind-resistant mounting)

7. Installation Guide

1. Drill pilot hole (match barrel diameter)

2. Press barrel teeth into material surface

3. Thread screw until teeth fully engage

4. Final torque: 1/8 turn past firm resistance

8. Removal Considerations

• Requires destructive extraction in most cases

• May leave permanent tooth marks

• Replacement barrels often needed

9. Industry Standards

• ASME B18.6.4 (dimensional compliance)

• MIL-F-18866 (military binding barrels)

• ASTM F468 (nonferrous fasteners)

10. Purchasing Specifications

When ordering, specify:

• Thread size (e.g., #10-24)

• Barrel length

• Tooth configuration

• Material grade

Chicago Screws with tooth provide superior holding power for critical applications where vibration-induced loosening cannot be tolerated. Their semi-permanent nature makes them ideal for final assembly situations.