Installing frets correctly is a crucial step in building or repairing stringed instruments. The method used for seating frets significantly impacts playability, intonation, and durability. Luthiers primarily use two methods to install frets:
- Fret Press – Uses steady pressure to seat frets evenly and securely.
- Fret Hammer – Uses controlled tapping to drive frets into the slot manually.
Both methods have their advantages and specific use cases. Understanding how and when to use each ensures that frets are properly seated, level, and long-lasting.
Fret Press: A Controlled Approach to Fretting
A fret press applies even pressure along the fret’s length, reducing the risk of uneven seating, deformation, or damage to the fretboard.
Types of Fret Presses
- Arbor Press Fret Setter
- A stationary press fitted with a caul (curved or flat insert) that matches the fretboard radius.
- Provides even pressure along the entire fret, minimizing spring-back.
- Ideal for fast, precise fret installation on new builds or refrets.
- Handheld Jaws or Clamp Press
- Functions similarly to an arbor press but is portable and useful for acoustic guitars where access to frets inside the body is limited.
- Can be used with radius-specific cauls for different fretboard curvatures.
- Drill Press Fret Setter
- A modified drill press with a fret caul attachment.
- Ensures consistent pressure but requires careful setup to prevent over-pressing.
Advantages of Using a Fret Press
✔ Even Pressure – Ensures uniform fret seating without deformation.
✔ Faster Installation – Especially useful for large-scale fret jobs.
✔ Minimizes Risk of Fret Backbow – Reduces the chances of distorting the neck.
✔ Better for Stainless Steel Frets – Requires less force compared to hammering.
How to Use a Fret Press
- Prepare the Fretboard
- Ensure fret slots are clean and properly sized for the fret tang.
- Lightly chamfer the slot edges to help seat the frets smoothly.
- Choose the Right Caul
- Match the caul to the fretboard radius (e.g., 9.5”, 12”, 16”).
- Press the Frets
- Start from one end and press slowly to avoid damaging the fret.
- For an arbor press, apply steady, controlled pressure to seat the fret fully.
- Check for Spring-Back
- If frets lift after pressing, reapply pressure or use a tiny amount of glue (hide glue, super glue, or epoxy).
Fret Hammer: The Traditional Method
A fret hammer is a time-tested tool used to drive frets into the slots using carefully controlled taps.
Types of Fret Hammers
- Brass Fret Hammer
- Soft metal that absorbs shock and prevents damaging the frets.
- Ideal for most fret materials, including nickel-silver and stainless steel.
- Plastic & Nylon-Tip Hammers
- Dual-headed with hard and soft sides for different applications.
- The softer side reduces denting, while the harder side provides extra force.
- Dead Blow Hammers
- Have a shock-absorbing core that reduces bounce-back.
- Helps seat frets without excessive force, minimizing fret deformation.
Advantages of Using a Fret Hammer
✔ More Control Over Individual Frets – Useful for spot adjustments and repairs.
✔ Better for Short Frets – Works well for partial fret replacements.
✔ Portable & Simple – Requires no setup like a press does.
How to Use a Fret Hammer
- Prepare the Fretboard
- Clean the slots and slightly bevel the edges for smooth insertion.
- Seat One End First
- Start at one side of the fret and tap it into place.
- Work Across the Fret
- Move from one end to the center, then the other end.
- Use light, controlled taps to avoid damaging the fret or fretboard.
- Check for Loose Frets
- If the fret does not stay seated, re-tap or use glue.
Fret Press vs. Fret Hammer: A Comparison
| Feature | Fret Press | Fret Hammer |
|---|---|---|
| Speed | Faster for entire fretboards | Slower but good for touch-ups |
| Consistency | Very consistent seating | Requires skill for even fretting |
| Best for | New fretboards, large-scale installations | Spot repairs, partial refrets |
| Risk of Fret Damage | Low, as pressure is even | Higher if hit too hard |
| Spring-Back Issues | Less likely | More likely without proper technique |
| Stainless Steel Frets | Easier to press in | Harder to hammer in |
Tips for Successful Fret Installation
- Use Proper-Sized Fret Slots
- Too tight: Frets won’t seat properly.
- Too loose: Frets may pop out.
- Work in a Stable Environment
- Avoid extreme humidity changes that can cause the fretboard to expand or contract.
- Use the Right Tool for the Job
- A fret press for new fretboards provides the best consistency.
- A fret hammer for repairs and touch-ups gives more flexibility.
- Secure the Neck Before Fretting
- A moving neck can cause uneven fret installation.
- Check Each Fret for Seating Issues
- Press down on each fret to see if it lifts after installation.
- Glue Frets If Needed
- If frets won’t stay seated, apply a small amount of super glue or hide glue before pressing them in.