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Question

Difficulty: EasyDrilling and Boring Tools

Which type of drill bit is specifically designed to bore clean, flat-bottomed holes in wood, such as those required for installing European-style cabinet hinges?

  1. A
    Twist drill bit
  2. Forstner bitAnswer
  3. C
    Spade bit
  4. D
    Countersink bit

Answer

Forstner bit
A Forstner bit is designed with a circular perimeter rim and radial chiseling cutters, allowing it to bore smooth, clean holes with flat bottoms regardless of grain direction.

Step-by-Step Solution

1
Identify the key requirement of the task
The job requires boring a clean, smooth, flat-bottomed hole or recess in wood.
Different drill bits produce distinct bottom profiles and surface finishes based on their cutting geometry.
2
Evaluate bit types based on hole geometry and finish quality
Twist bits leave a 118° or 135° conical bottom, spade bits leave rough bottoms with a deep center point hole, countersinks create conical chamfers, and Forstner bits shave wood flat across the entire diameter.
A Forstner bit uses exterior shearing rims and radial cutting blades to create a perfectly flat bottom.

Key Concept

Selecting drilling and boring bits based on hole geometry and material requirements
Estimated Time:45s
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Topics

Drilling and Boring Tools

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