Custom 5 16 Hollow Dowel Pins Internal Threaded Dowel Pin Metal Dowel Pins

Description

What Are Hollow Dowel Pins?

Hollow dowel pins are cylindrical fasteners with a central bore, designed for precise alignment and positioning of machine parts, jigs, or woodworking joints. Their hollow structure reduces weight while maintaining strength and allows for easy ejection or insertion of secondary components (e.g., screws or pins) through the center.

Hollow Dowel Pins: Specifications

1. Material

• Carbon Steel (Grade 5/8): High strength for industrial machinery 4.

• Stainless Steel (304/316): Corrosion-resistant for medical/food equipment.

• Aluminum (6061-T6): Lightweight for aerospace applications.

• Brass (CZ121): Non-sparking for explosive environments.

2. Surface Treatment

• Chrome Plating: Hard, wear-resistant surface (common in woodworking tools) .

• Passivation (Stainless Steel): Enhances rust resistance.

• Anodizing (Aluminum): Improves durability and color coding.

3. Common Specifications

• Diameter: 1/4″ to 1″ (6mm–25mm) .

• Length: 10mm–100mm (customizable).

• Tolerance: ±0.01mm (precision-ground).

• Standards: ISO 8734, DIN 7.

4. Applications

• Woodworking: Aligning joints in furniture/cabinetry .

• Automobile: Engine block component alignment.

• Électronique: PCB mounting in enclosures.

• Medical Devices: Surgical instrument assembly.

Excellent Case: Aerospace Wing Assembly Jig

Challenge:
An aircraft manufacturer needed to align composite wing panels with sub-millimeter precision while minimizing jig weight. Traditional solid dowels added unnecessary mass and complicated disassembly.

Solution:

• Used anodized aluminum hollow dowel pins (10mm diameter):

  • Weight Reduction: 40% lighter than solid steel pins.

  • Precision: Maintained 0.05mm alignment tolerance.

  • Efficiency: Central bore allowed quick ejection with pneumatic tools.

Results:

• Reduced wing assembly time by 30%.

• Achieved FAA compliance for weight distribution.

Key Advantages

✔ Weight Savings – Ideal for weight-sensitive designs.
✔ Dual Functionality – Central bore enables secondary fastening.
✔ Corrosion Options – Coatings adapt to harsh environments.