Watch Balance Wheel 7009A with Hairspring – Precision Part

Watch Balance Wheel 7009A with Hairspring – Full Swing Precision Movement Replacement

Keep your timepiece ticking with pinpoint accuracy. This 7009A Balance Wheel with Hairspring is a high-quality replacement movement component designed specifically for watchmakers and hobbyists repairing or overhauling watches that use the popular 7009 / 7009A movement. The balance wheel is the heart of a mechanical watch — responsible for regulating the timekeeping oscillation — so using a precision-grade replacement part makes all the difference in restoring reliable performance.

Whether you're a professional watchmaker or a dedicated watch repair enthusiast, this drop-in balance wheel assembly (complete with hairspring) delivers the full-swing action needed for accurate, consistent movement regulation.

Key Features

• Compatible Movement: Designed for 7009 / 7009A watch movements
• Complete Assembly: Includes balance wheel and hairspring for full-swing operation
• Material: Durable metal construction for long-lasting performance
• Compact Size: Approximately 3 × 3 cm — purpose-built to fit seamlessly
• Quantity: 1 piece per pack
• Ideal For: Watch repair, movement overhaul, and replacement of worn or damaged balance assemblies

Who Is This For?

This balance wheel assembly is perfect for:

• Professional watchmakers performing movement service or repair
• Watch repair hobbyists and collectors restoring vintage timepieces
• Technical schools and watchmaking students practicing movement disassembly and reassembly

Specifications

Please note: Monitor settings and lighting conditions may cause slight colour variation from product images. Minor measurement deviations (±1–2 mm) may occur due to manual measurement methods.

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Learn More About Mechanical Watch Movements

For a deeper understanding of how balance wheels and escapements regulate timekeeping in mechanical watches, visit the Smithsonian Institution's Clockwork collection — an authoritative resource on horology and mechanical timekeeping history.

Learn more: Lathe

Frequently Asked Questions

Q: Which watch movements is this 7009A balance wheel compatible with?

A: This balance wheel with hairspring is specifically designed for watches fitted with the 7009 and 7009A mechanical movements. Always verify your movement calibre number before ordering to ensure a correct fit.

Q: Does this balance wheel come with the hairspring already attached?

A: Yes — this listing includes a complete balance wheel assembly with hairspring, ready for installation. This is a full-swing assembly, so no separate hairspring purchase is needed.

Q: Is this suitable for a beginner watchmaker?

A: Balance wheel installation requires precision and the proper watchmaking tools. While experienced hobbyists can manage this repair, we recommend that beginners practice on spare movements first or consult a professional watchmaker to avoid damaging the delicate hairspring.

Q: What tools do I need to install this balance wheel?

A: You'll typically need a watch case opener, movement holder, fine-tipped tweezers, a loupe or magnifier, and a small screwdriver set designed for watchmaking. Taking care not to stress or bend the hairspring during installation is essential for accurate timekeeping after reassembly.