Dopro Guitar Tuner Conversion Bushings 10.2mm
Product description
When a guitar has modern 3/8-inch tuner holes but you want to fit vintage-style tuning machines, the mismatch can make a direct installation difficult. These Dopro conversion bushings are designed to adapt that hole size for compatible vintage tuners, with a 10.2mm outside diameter and solid brass construction. The key detail is the inner diameter: the listing describes 6.2mm and 6.5mm options for different tuner posts, so matching the bushing to your hardware matters more than choosing by appearance alone.
Key specifications
The bushings are intended for modern headstocks with 3/8-inch (10mm) tuner holes. Their 10.2mm outside diameter is the fit dimension given for the headstock hole, while the inner diameter must suit the tuner’s string post. The listing associates 6.2mm bushings with Wilkinson vintage-style tuners, Gotoh SD Series vintage-style locking tuners, and various import vintage-style tuners with 6mm posts. It associates 6.5mm bushings with most USA vintage tuners, Gotoh SD Series standard vintage tuners, and Kluson vintage tuners with 6.3mm posts.
Those compatibility notes include exclusions: the 6.2mm size is not for Gotoh standard vintage tuners, and the 6.5mm size is not for Gotoh locking tuners. Measure the post and the existing headstock hole before selecting a size. The product name identifies a 10.2mm round version, but the information provided does not make clear which inner diameter is supplied in a particular selection.
Who it’s for
These make sense for a guitar owner adapting compatible vintage-style tuners to a headstock with modern-size holes, rather than replacing the tuners with another modern set. For example, if you’re fitting vintage-style machines and find the headstock holes are larger than the tuner posts, a correctly matched bushing fills that gap and supports a press-fit, drop-in installation. The listing describes the parts as easy to install and finished without burrs, though fit still depends on the actual measurements and tuner model.
A solid pick if you’ve confirmed the hole and post dimensions and want brass conversion bushings for this specific retrofit. You may want to skip it if you haven’t identified the tuner post size, need a different hole fit, or expect a universal part that works with every vintage tuner. From the way it is set up, this is a small compatibility part, not a solution for mismatched measurements.
Everyday use
In practice, the decision comes before installation: check the headstock hole, then measure the tuner post and select the corresponding inner diameter. That makes this a more targeted approach than buying a generic bushing based only on the tuner style. The stated construction is solid brass, and the bushings are described as press-fit parts, no installation tools or additional hardware are specified in the supplied information. If your measurements do not match the listed sizes, this product may not address the fit issue.
Before you decide
What headstock holes are these designed for? The stated outside diameter is 10.2mm, and the listing describes use with 3/8-inch (10mm) tuner holes.
How do I choose between the inner diameters? Match the bushing’s inner diameter to the tuner post: the listing gives separate compatibility guidance for 6.2mm and 6.5mm sizes. Measure rather than relying on the tuner name alone.
Do they fit every Gotoh vintage tuner? No. The listing separates Gotoh SD Series locking and standard vintage tuners, and notes that each inner diameter has a Gotoh exclusion.
Buying verdict
Buy these if your headstock has the stated hole size, your tuner is among the compatible styles, and the selected inner diameter matches its post. The solid brass construction and drop-in press-fit design suit a focused conversion rather than a broad tuner upgrade. If you cannot verify both measurements—or your tuner falls under one of the listed exclusions—choose a bushing specified for that exact fit instead.