KAISH Premium Brass Vintage Guitar Tuner Bushings - Solid Brass Fit

In this review the KAISH Premium Brass Vintage Guitar Tuner Bushings are evaluated for players restoring or modifying vintage ST, TL and LP style guitars. The bottom line: these solid brass ferrules are for anyone installing vintage-style tuning machines into older headstocks drilled with smaller holes, and the single biggest reason to buy is the precise press-fit construction that matches common vintage post diameters so tuners sit flush without gaps or burrs. It is a practical, low-cost part that solves fit and finish issues during a vintage tuner swap.

Key Features

• Material: Solid brass construction provides durable, corrosion-resistant ferrules that maintain a vintage look while lasting through string changes.
• Vintage fit: Designed for vintage smaller tuner holes such as 5/16 in (8mm) or 11/32 in (8.5mm), making these suitable for many older ST/TL/LP style headstocks.
• Inner diameter options: The 6.2mm I. D. size accommodates tuners with ~6mm string posts including Wilkinson and some Gotoh SD vintage style models.
• Finish and fit: Nicely finished, no burrs and a true press-fit design ensure the bushing drops in cleanly and seats flush for a neat installation.
• Compatibility note: These bushings are not for modern 10mm tuner holes, so measuring existing posts and holes avoids misfit and wasted parts.

Who It's For

These bushings suit luthiers, hobbyists and players who are installing vintage-style tuning machines on guitars with smaller, older tuner holes common to vintage and vintage-reissue instruments. If you are fitting Wilkinson vintage style tuners, Gotoh SD Series vintage style locking tuners with 6mm posts, or various import vintage-style tuners, the 6.2mm I. D. size will often be correct.

Players who have modern guitars with 10mm tuner holes or who need a different inner diameter should look elsewhere; the product is specific to vintage-sized installations and relies on accurate measurement of post and headstock hole diameters before purchase.

Pros & Cons

Pros

• Solid brass gives a durable, authentic vintage appearance while resisting corrosion.
• Press-fit design and smooth finish eliminate burrs and simplify installation.
• Specific inner diameter sizing (6.2mm) matches many vintage and some Gotoh Wilkinson tuners for a snug fit.

Cons

• Not compatible with modern 10mm tuner holes, so it is unsuitable without additional drilling or bushings.
• Only one I. D. size described here, so buyers with other vintage post sizes must confirm fit or choose a different size.

Specifications

Brand	KAISH
Material	Solid brass
Inner diameter (I. D.)	6.2mm (0.24 in)
Outer diameter (O. D.)	8.3mm
Intended tuner holes	Vintage smaller 5/16 in (8mm) or 11/32 in (8.5mm)
Fit style	Press-fit drop-in ferrules

Our Verdict

The KAISH brass vintage tuner bushings are a straightforward, well-made solution for anyone fitting vintage-style tuners to older headstocks. They deliver a solid, clean fit and authentic brass finish at low cost, making them good value for restorations and upgrades when the headstock hole and post diameters match the listed sizes.

Frequently Asked Questions

Will these fit modern 10mm tuner holes?
They do not fit modern 10mm holes; these are made for vintage smaller holes around 8mm to 8.5mm.

Which tuner posts use the 6.2mm I. D. bushings?
The 6.2mm I. D. size is typically used with Wilkinson vintage style tuners and some Gotoh SD Series vintage style locking tuners that have ~6mm string posts.

Are these threaded or press-fit?
They are solid press-fit drop-in bushings with a finished edge and no burrs for simple installation.