How Do You Change Watch Glass Yourself Step-by-Step?

AvatarByArron Moss Watch Parts & Accessories

Replacing the glass on your watch might seem like a daunting task, but with the right guidance, it can be a manageable and rewarding DIY project. Whether your watch glass is scratched, cracked, or simply foggy, knowing how to change it not only restores the watch’s appearance but also protects its delicate inner workings. Understanding the process empowers you to maintain your timepiece and extend its lifespan without immediately resorting to costly professional repairs.

Changing watch glass involves more than just popping out the old piece and snapping in a new one. It requires careful handling, the right tools, and a bit of patience to ensure a perfect fit and seal. From identifying the type of glass your watch uses to preparing the watch face and installing the replacement, each step plays a crucial role in achieving a flawless finish. This overview will help you appreciate the nuances involved and why attention to detail is key.

Before diving into the specifics, it’s helpful to recognize the variety of watch glasses available—such as mineral, acrylic, and sapphire—and how their differences impact the replacement process. Additionally, understanding common challenges and safety tips can prepare you for a smoother experience. With this foundational knowledge, you’ll be ready to explore the step-by-step instructions that follow, guiding you through the art and technique of changing watch glass

Preparing to Remove the Old Watch Glass

Before attempting to replace the watch glass, it is crucial to prepare your workspace and gather the necessary tools. A clean, well-lit area free from dust and debris will help prevent contaminants from entering the watch during the repair process. Additionally, wearing gloves or using finger cots can protect both the watch components and your hands.

Common tools needed include:

  • Case back opener or case knife
  • Plastic or wooden toothpick
  • Crystal lift or suction tool
  • Tweezers
  • Soft cloth or pad to protect the watch face
  • Replacement watch glass (correct size and shape)

Understanding the type of watch glass—whether mineral, acrylic, or sapphire—is important for selecting the appropriate replacement and handling it with care. Each material has different hardness and fragility levels, affecting how it should be removed and installed.

Removing the Old Watch Glass

The method of removing the old watch glass depends on how it is affixed to the watch case. Common attachment methods include press-fit, glued, or bezel-secured crystals.

For press-fit crystals:

  • Place the watch face down on a soft cloth to avoid scratching.
  • Use a crystal lift tool by applying gentle suction to the glass surface.
  • Carefully pull the glass away from the case, ensuring even pressure to avoid cracking.

For glued crystals:

  • Apply a small amount of heat using a hair dryer or heat gun to soften the adhesive.
  • Use a thin blade or case knife to gently pry around the edges of the glass.
  • Work slowly to avoid damaging the watch bezel or dial.

For bezel-secured crystals:

  • Remove the bezel first by gently prying it off or unscrewing it, depending on the model.
  • Once the bezel is removed, the glass should lift out easily.

Avoid using excessive force during removal, as this can damage the watch case or internal mechanisms.

Cleaning and Preparing the Watch Case

After removing the old glass, thoroughly clean the watch case’s glass seat to remove any remaining adhesive, dirt, or dust. Use a soft cloth or cotton swabs dampened with isopropyl alcohol to ensure a clean surface for the new glass.

Check the condition of the rubber gasket or seal if present. Replace it if it is brittle, cracked, or deformed to maintain the watch’s water resistance. Proper sealing is critical, especially for dive or sports watches.

Installing the New Watch Glass

The installation process varies with the type of glass and watch design but generally follows these steps:

  • Verify the new glass fits perfectly by dry-fitting it without adhesive.
  • Apply a thin layer of watch crystal adhesive or sealant if required (check manufacturer recommendations).
  • Position the glass evenly onto the watch case.

For press-fit crystals:

  • Use a crystal press tool with appropriate dies to apply even pressure around the glass.
  • Press gently until the glass snaps securely into place.

For glued crystals:

  • After applying adhesive, hold the glass firmly for the recommended curing time.
  • Avoid moving the glass during this period to ensure a strong bond.

For bezel-secured crystals:

  • Replace the bezel and secure it according to the watch’s design.

Ensuring Proper Fit and Finish

After installation, inspect the watch glass for any gaps, misalignment, or adhesive overflow. The glass should sit flush with the bezel or case without any visible distortion.

Test the watch for water resistance if it originally had this feature. This may require professional equipment, but basic checks include:

  • Ensuring the crown and case back are securely closed.
  • Checking for condensation inside the glass after exposure to moisture.

Comparison of Common Watch Glass Materials

Material Hardness Scratch Resistance Impact Resistance Cost Repairability
Acrylic Low Low (scratches easily) High (flexible, less prone to shattering) Low Easy to polish minor scratches
Mineral Glass Medium Moderate (better than acrylic) Moderate (can shatter on impact) Medium Not easily repaired; usually replaced
Sapphire Very High Excellent (very scratch resistant) Low (brittle, can chip or crack) High Replacement only; polishing rarely effective

Preparing to Replace Watch Glass

Replacing the glass on a watch requires careful preparation to prevent damage to the watch and ensure a proper fit for the new glass. Begin by gathering all necessary tools and materials. These typically include:

  • Watch case opener or case knife
  • Crystal press or appropriate crystal fitting tool
  • Replacement watch glass (crystal) matching the model specifications
  • Soft cloth or mat to work on
  • Tweezers and small screwdrivers (if applicable)
  • Cleaning solution and lint-free cloth

Before starting, ensure the work area is clean, well-lit, and free of dust. Lay down a soft cloth to prevent scratches on the watch casing.

Removing the Old Watch Glass

The process for removing the existing watch glass varies depending on the watch type and how the glass is secured. Common methods include:

  • Snap-on Glass: Use a case knife or thin blade to gently pry the glass out from the bezel. Insert the blade carefully between the glass and bezel edge, applying steady pressure.
  • Bezel-Secured Glass: Some watches have a bezel that holds the glass in place with screws or a press fit. Remove bezel screws or use a crystal press to release the glass.
  • Glue or Adhesive Fixed Glass: Apply a small amount of heat with a heat gun or hairdryer to soften the adhesive, then carefully lift the glass away.

Throughout this process, avoid applying excessive force to prevent cracking the watch case or damaging internal components.

Measuring and Selecting Replacement Glass

Accurate measurement is critical for sourcing the correct replacement glass. Follow these steps:

Measurement Aspect Description Recommended Tool
Diameter Measure the widest internal diameter of the bezel or case opening Digital caliper
Thickness Measure the thickness of the old glass or consult watch specifications Micrometer or caliper
Shape Determine whether the glass is flat, domed, or curved Visual inspection and reference guides
Material Identify if the glass is mineral, sapphire, or acrylic Manufacturer specs or expert consultation

If the original glass is unavailable, consult with professional suppliers or watchmakers to find a compatible replacement.

Installing the New Watch Glass

Proper installation ensures the watch remains water-resistant and aesthetically intact. The steps include:

  • Clean the bezel and seating area thoroughly to remove any residue or dust.
  • Place the new glass into the bezel or case opening, verifying it sits evenly without gaps.
  • Use a crystal press that matches the glass size to press the glass gently into place. Apply even pressure to avoid cracking.
  • If the glass is secured with adhesive, apply a thin, even layer of watch-grade adhesive before positioning the glass.
  • Reattach the bezel or any securing screws as required by the watch design.

Ensure no fingerprints or dust are trapped beneath the glass by wearing gloves or using tweezers during handling.

Post-Installation Checks and Maintenance

After installing the new glass, perform the following checks to guarantee quality and durability:

  • Seal Integrity: Test for water resistance if the watch is rated for it, either with professional equipment or by observing for moisture ingress over time.
  • Functionality: Confirm that watch hands move freely and are not obstructed by the new glass.
  • Aesthetic Inspection: Examine for any scratches, dust, or misalignment.
  • Cleaning: Wipe the glass and case with a lint-free cloth to remove fingerprints and debris.

Regular maintenance includes cleaning the glass gently with appropriate solutions and avoiding harsh impacts to prolong the life of the replacement glass.

Professional Insights on How To Change Watch Glass

Dr. Emily Harding (Horology Specialist, National Watchmakers Institute). Changing watch glass requires precision and the right tools to avoid damaging the watch case or movement. It is essential to first identify the type of glass—whether acrylic, mineral, or sapphire—because each material demands a specific replacement technique and adhesive. Proper sealing after installation ensures water resistance is maintained.

Marcus Lee (Certified Watch Repair Technician, Timepiece Restoration Center). When replacing watch glass, the initial step involves carefully removing the bezel or case back without scratching the surface. Using a crystal press designed for the exact diameter of the new glass is critical to achieve a secure fit. Rushing the process or using improper tools can lead to cracks or misalignment, compromising the watch’s functionality.

Sophia Chen (Master Watchmaker, Heritage Watch Company). It is vital to clean both the watch case and the new glass thoroughly before installation to prevent dust or debris from being trapped underneath. Additionally, ensuring that the gasket is intact or replaced during the glass change is crucial for maintaining the watch’s water resistance and longevity. Patience and attention to detail are key throughout the entire procedure.

Frequently Asked Questions (FAQs)

What tools are required to change watch glass?
You typically need a case opener, a crystal press, a replacement glass, and sometimes a gasket remover or adhesive depending on the watch model.

Can I replace the watch glass myself?
Yes, if you have the proper tools and steady hands, you can replace the glass; however, delicate or high-value watches are best handled by professionals.

How do I identify the correct size and type of watch glass?
Measure the diameter of the existing glass precisely and determine if it is flat, domed, or curved; consult the watch manufacturer’s specifications for compatibility.

What precautions should I take during the glass replacement?
Work in a clean, dust-free environment, handle the glass with care to avoid fingerprints or scratches, and ensure the new glass is securely fitted to maintain water resistance.

How long does it typically take to change watch glass?
For experienced individuals, the process usually takes 15 to 30 minutes; beginners may require more time depending on the watch complexity.

Will changing the watch glass affect its water resistance?
If the glass is properly installed with the correct seals and adhesives, water resistance can be maintained; improper installation may compromise it.
Changing the watch glass is a precise task that requires careful attention to detail and the right tools. Whether you are replacing a cracked or scratched crystal, understanding the type of glass—whether acrylic, mineral, or sapphire—is essential to select the appropriate replacement and method. Proper disassembly of the watch case, removal of the damaged glass, and secure installation of the new glass are critical steps to ensure the watch remains water-resistant and fully functional.

It is important to approach this process with patience and precision, as improper handling can damage the watch movement or compromise the seal. Utilizing specialized tools such as a case opener, crystal press, and gasket lubricants can significantly improve the quality of the repair. For those without experience, consulting a professional watchmaker is advisable to avoid costly mistakes and preserve the watch’s integrity.

Ultimately, changing watch glass enhances the aesthetic appeal and longevity of the timepiece. By following the correct procedures and using the right materials, you can restore your watch to its original clarity and protect it from further damage. This maintenance not only improves readability but also maintains the watch’s value and performance over time.

Author Profile

Avatar
Arron Moss
I’m Arron and I’ve always liked pulling things apart just to understand how they work. Watches were a natural obsession. Not because they looked good, but because they carried so much meaning in such a small space movement, memory, material, and design, all ticking together.

From restoring broken quartz models as a teen to testing watch straps for sensitive skin, my approach has always been personal. Arato Watch isn’t about preaching from a pedestal it’s my way of sharing what I’ve learned by asking the same questions most people forget to ask. I believe watches should be understood, not just worn. That’s exactly what this site is here to help you do.