Hinges (Junior Cert Wood Technology): Revision Notes

Hinges

Definitions

• Hinges: Mechanical devices in woodworking and furniture that enable doors and lids to rotate without compromising structural integrity.

Types of Hinges

Hinges serve various functions based on their designs:

• Butt Hinges:
  • Primarily used in doors.
  • Made of steel or brass, ranging from 13mm to 150mm.
  • Two-leaf design, recessed for a flush finish.
• Piano Hinges:
  • Also known as continuous hinges.
  • Used for long panels like piano lids.
  • Lengths available at 1830mm and 2440mm.
  • Distribute weight evenly.
• Concealed Hinges:
  • Common in cabinets for a clean look.
  • Hidden when doors are closed.
  • Precision required for hinge cup placement.

Diagram:

Factors Affecting Hinge Selection

Consider these factors when selecting a hinge:

• Weight Capacity: Must support the load of the door or lid.
• Alignment: Essential for smooth operation.
• Movement Type: Hinge choice varies with door movement direction.
• Environmental Factors: Consider moisture and durability.

Installing a Basic Hinge

Step-by-step process to install a butt hinge:

1. Tools Required: Screws, screwdriver, tape measure, drill.
2. Marking Positions:Diagram:
   • Use a tool to mark hinge outlines.
   • Precision in marking is crucial.
3. Pre-drill Holes: Avoids wood splitting.
4. Secure the Hinge: Attach firmly with screws.
5. Final Alignment Check: Confirm smooth operation.

Maintaining Hinges

Ensure optimal function by:

• Regular Inspection: Every 3-6 months.
• Lubrication: Use appropriate metal oils.
• Adjust Misalignment: Correct during inspections.

Summary