Maintaining Open Gear Tuning Machines: A Simple Guide

Updated at: 13/02/2025

Open gear tuning machines, while offering a satisfyingly direct feel and often a more robust build than enclosed counterparts, require regular maintenance to ensure their smooth operation and longevity. Neglecting these crucial components can lead to frustrating tuning difficulties, inaccurate intonation, and even potential damage to your instrument. The intricate workings of these machines, exposed as they are, are susceptible to dust, grime, and the damaging effects of humidity, making preventative care essential.

This vulnerability, however, doesn't mean that keeping your open gear tuners in top condition is a daunting task. In fact, with a few simple steps and regular attention, you can easily prolong their life and maintain their precise performance. Let's delve into a straightforward, step-by-step guide that will equip you with the knowledge and techniques needed to keep your open gear tuning machines functioning flawlessly.

Preparation and Safety Guidelines

Tools Needed
  • Guitar
  • Ear swab/Toothpick
  • Petroleum jelly
  • Clean Q-tip
Safety Guidelines
  • Always disconnect power to the tuning machine before performing any maintenance or cleaning. Failure to do so could result in electric shock.
  • Use appropriate personal protective equipment (PPE), including safety glasses, when cleaning or handling open gear tuning machines. Moving parts and potential for debris can cause eye injuries.
  • Never attempt to lubricate or repair the tuning machine if you are not familiar with its mechanics. Consult a qualified technician if unsure.

Step-by-Step Instructions

  1. Preparation

  2. Applying Petroleum Jelly

    • Use an ear swab or toothpick to apply the petroleum jelly.
    • Run the swab/toothpick along the moving parts of the tuning machines.
    • Apply petroleum jelly under the tuning machine as well.
    • Move the swab/toothpick back and forth to distribute the petroleum jelly.
    Move the swab/toothpick back and forth to distribute the petroleum jelly.Move the swab/toothpick back and forth to distribute the petroleum jelly.Move the swab/toothpick back and forth to distribute the petroleum jelly.Move the swab/toothpick back and forth to distribute the petroleum jelly.
    Applying Petroleum Jelly

  3. Testing and Adjustment

    • Ensure full turn of the tuning machines after application.
    Ensure full turn of the tuning machines after application.
    Testing and Adjustment

  4. Cleaning Up

    • Wipe off excess petroleum jelly to avoid transferring to hands or guitar finish.
    • Use a clean Q-tip to mop up any residual petroleum jelly.
    Use a clean Q-tip to mop up any residual petroleum jelly.Use a clean Q-tip to mop up any residual petroleum jelly.
    Cleaning Up

Read more: Fixing Loose Acoustic Guitar Tuners: The Toothpick & Glue Method

Tips

  • For heavily rusted or gunked-up machines, remove the strings, soak in a cleaning solution, and then lubricate.
  • Focus petroleum jelly application on moving parts (metal to metal) only to avoid getting it on the finish.
  • Toothpicks with holes on one side are helpful for applying lubricants.

Common Mistakes to Avoid

1. Over-tightening Tuning Machine Screws

Reason: Excessive tightening can strip the gears or damage the machine's internal components, leading to slippage or complete failure.
Solution: Tighten screws only until they are snug; avoid excessive force.

2. Using Incorrect Lubricant

Reason: Using the wrong type of lubricant (e.g., thick grease) can attract dust and grime, hindering smooth operation and potentially damaging the delicate parts.
Solution: Use a light, instrument-specific lubricant or a very small amount of graphite.

FAQs

How often should I lubricate my open gear tuning machines?
Ideally, lubricate your open gear tuning machines every 3-6 months, or more frequently if they're used heavily or in dusty environments. Check for signs of wear or lack of lubrication more often.
What type of lubricant should I use?
Use a high-quality, light machine oil specifically designed for precision instruments. Avoid using thick grease or oils that might attract dust and grime.
What should I do if my tuning machine is stiff or unresponsive?
First, try lubricating the gears. If the problem persists, it might indicate worn gears or other internal damage. Consult a qualified luthier or repair technician for further assistance.