Schaller M6 Pin Locking Tuners — 3/3 Chrome, Set of 6 (SKU: 45450P)

The Schaller M6 Pin is the original locking tuner — the product that Schaller invented, patented and has refined over more than twenty years as the benchmark locking tuner in the guitar world. This set of six in 3/3 configuration with chrome finish uses Schaller's patented ball socket pin lock system — locking the string with a knurled nut at the rear of the peghead for a low overall profile and a string change process that takes seconds rather than minutes. Gear ratio 1:18. At Angkor Music Melbourne we carry the largest range of Schaller hardware in Australia — if you need a specific Schaller configuration, we have it.

Schaller Invented the Locking Tuner — The History Matters

Schaller was the world's first manufacturer to develop and patent the locking tuner — a claim that matters because it means every other locking tuner on the market is working from Schaller's original concept. The locking tuner was not a solution that emerged simultaneously from multiple manufacturers — it was Schaller's invention, patented more than twenty years ago and refined continuously since.

When you purchase a Schaller M6 Pin you are buying the original — the product that established what a locking tuner does and how it should work. Other manufacturers have produced versions of the locking tuner concept, some at lower price points. None of them are the original.

How the Pin Lock System Works

The Schaller M6 Pin uses a ball socket principle for string locking — different from the cam-and-clamp systems used on many other locking tuners and significantly more effective at preventing string notching and breakage.

The installation process is straightforward:

1. Thread the string through the tuner shaft hole as you normally would
2. Tighten the knurled nut located on the rear of the peghead — this activates the pin lock mechanism and secures the string
3. Tune to pitch — no winding is required

The string is not wound onto the shaft — it is locked in place and tuned directly. This produces two significant practical benefits:

• Faster string changes: Without winding, a complete restring takes a fraction of the time of a conventional tuner installation. On a guitar that is regularly restrung for gigs or recording sessions this is a meaningful practical advantage.
• Superior tuning stability: String windings on conventional tuners are one of the primary causes of tuning drift — each winding is a potential slip point. With no windings, the string goes from locked to tuned to stable with maximum reliability. For non-locking tremolo systems — Bigsby, vintage Fender tremolo, Gotoh 510 — this is particularly significant, as the tuning stability of the whole system depends on the string not slipping at the tuner.

Ball Socket Principle — Preventing String Notching and Breakage

Schaller's patented ball socket locking principle is specifically designed to prevent string notching and breakage at the tuner — one of the most common points of string failure on guitars with locking tuners that use cam-and-clamp or similar mechanisms.

When a string is clamped under high lateral pressure — as in some locking systems — the clamp mechanism creates a stress point in the string at the clamp edge. Over time and with repeated tuning movement this stress point develops into a notch and eventually a break. The ball socket principle distributes the locking force differently — securing the string without creating the lateral stress that causes notching. The result is a locking mechanism that is both more secure and gentler on strings than competing designs.

Low Profile Design

The knurled locking nut is located on the rear of the peghead — not on the face of the tuner button or barrel. This design keeps the overall height of the tuner installation low and unobtrusive, maintaining the visual profile of the headstock without the additional height that some locking tuner designs add. The M6 Pin installs cleanly and looks like a quality conventional tuner from the front while providing full locking functionality from the rear.

3/3 Configuration — Standard Guitar Headstock

The 3/3 configuration — three tuners per side — is the standard for most acoustic and electric guitar headstocks including Les Paul, SG, ES, most acoustic guitars and all guitars with a symmetrical three-per-side headstock layout. This set includes six tuners configured for three-per-side installation.

Specifications

Expert Advice at Angkor Music

At Angkor Music Melbourne we carry the most comprehensive range of Schaller hardware in Australia — tuning machines, strap locks, bridges and accessories across every finish, configuration and model. If you have questions about which Schaller tuner is correct for your guitar — headstock drilling, bushing size, shaft length or button style — contact us before ordering and our team will confirm the correct specification.

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