Slotted Chicago Screws

冷間圧造加工は、切削の少ない、あるいは切削を必要としない新しい圧造加工のひとつである。
金属。の作用による金属の塑性変形を利用した加工法である。
外力を受け、金型の助けを借りて、金属の体積を再分配し、移動させる。
必要な部品やブランクを製造します。冷間圧造工程は、標準的な
ボルト、ネジ、ナット、リベット、ピンなどの留め具。

1. Fundamental Definition

Slotted Chicago screws (commonly called sex bolts または 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

• 耐振動性: 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

• インダストリアル: 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.