Slotted Chicago Screws

冷镦加工是一种少切削或无切削的压力加工新工艺
金屬。它是一種利用金屬在下列因素作用下產生塑性變形的加工方法
外力作用下，在模具的幫助下，重新分配和轉移金屬的體積，以形成
所需的零件或坯料。冷镦工艺最适合生产标准的
螺栓、螺絲、螺帽、鉚釘和銷等緊固件

1. Fundamental Definition

Slotted Chicago screws (commonly called sex bolts 或 binding barrels) are specialized two-piece fasteners designed for secure, flush-mounted assemblies. These mechanical fasteners consist of two interlocking components:

• Male screw: Features a slotted drive head and external machine threads

• Female barrel: Contains internal threads and an external flange for load distribution

2. Key Characteristics

• Reversible Assembly: Allows repeated disassembly without material damage

• Flush Mount Capability: Countersunk heads sit nearly flush with surfaces

• 抗震性: Threaded connection resists self-loosening

• Material-Friendly: Eliminates compression damage common with rivets

4. Mechanical Properties

• Tensile Strength: 45,000-70,000 psi (carbon steel)

• Shear Strength: ~60% of tensile strength

• Torque Capacity: 4-25 in-lbs depending on size

• Temperature Range: -20°F to +250°F (untreated steel)

5. Functional Advantages

• Precision Tension Control: Adjustable tightness

• Clean Aesthetics: Low-profile installation

• Material Versatility: Compatible with leather, wood, plastics, composites

• Serviceability: Facilitates maintenance access

6. Industry Applications

• Leathercraft: Holsters, belts, saddles

• Woodworking: Furniture, cabinets, displays

• 工業級: Equipment panels, signage

• Commercial: Retail displays, sample cases

8. Quality Indicators

• Threads: Smooth engagement without cross-threading

• Flange: Flat bearing surface without burrs

• Slot: Centered, properly machined for driver engagement

10. Maintenance Considerations

• Inspection: Annual check in high-vibration use

• Replacement: When threads show >30% wear

• Corrosion Prevention: Use plated/stainless versions in humid environments

12. Historical Context

First patented in the late 19th century for bookbinding applications, Slotted Chicago Screws have evolved into essential fasteners across multiple industries. Their simple yet effective design has remained largely unchanged for over 100 years, demonstrating exceptional functional longevity.