# Pilot Holes

A pilot hole is a small hole drilled before the final hole size. Pilot holes improve accuracy and make larger holes easier to drill.

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</div>## Why Use a Pilot Hole?

Pilot holes help:

- Keep the drill bit centered
- Reduce drill bit wandering
- Improve hole accuracy
- Reduce cutting force on larger drill bits
- Produce cleaner holes

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</div>## When to Use Pilot Holes

Pilot holes are especially useful when:

- Drilling large holes
- Drilling thick material
- Working with precise hole locations
- Using step-up drill sizes

Small holes, such as rivet holes, often do not require a pilot hole.

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</div>## Typical Process

1. Mark the hole location.
2. Center punch the hole.
3. Drill a small pilot hole (such as 1/8").
4. Drill the final hole size.

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</div>## Best Practices

- Always center punch before drilling.
- Keep the drill perpendicular to the material.
- Use steady pressure and let the drill bit cut.
- Deburr the finished hole.

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</div>## Key Idea

Pilot holes improve drilling accuracy and make larger holes easier to produce. Taking the extra step can prevent misplaced holes and improve part quality.