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Window Coil Balance Replacements | Single & Dual Constant Force Balances for Tilt Windows

Constant force coil balances are specialized window components that help sashes open and close smoothly while staying in position. Designed for tilt windows, these single and dual coil balances deliver reliable support and are essential for restoring proper window function. This collection features genuine AmesburyTruth parts for precise replacements and long-lasting durability.
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Constant force coil balances, sometimes called coil spring balances, are crucial for maintaining the safe and effortless operation of tilt windows. These balances use tightly wound stainless steel coils to counterbalance the weight of the window sash, ensuring smooth up-and-down movement and allowing the sash to stay in any position. Single coil balances use one coil per side, while dual coil (or tandem) balances stack two coils for heavier sashes or increased fine-tuning of tension.

How Constant Force Coil Balances Work

Each balance is housed within the window jamb and connected to the sash via a pivot lock shoe. As you open or close the window, the coil contracts or extends,similar to a tape measure,precisely offsetting the sash weight for controlled movement. The number and strength of coils are matched to the sash's weight, offering consistent performance and reliability for both residential and commercial windows.

Use Cases and Compatibility

These balances are most commonly found in modern vinyl or aluminum tilt windows, supporting double-hung or single-hung designs. They are indispensable for repairing windows that drop unexpectedly, fail to stay open, or become hard to lift. When replacing, always check the coil weight stamped on your existing hardware or consult your window's technical specifications to ensure the correct match. AmesburyTruth constant force coil balances are compatible with leading window brands and models that use 1/2 inch, 3/4 inch, or 1-1/4 inch pocket systems.

  • Stainless steel construction resists corrosion and wear
  • Available in single, dual, or tandem coil configurations
  • Precision-calibrated for sash weights ranging from 3.5 to 18 lbs (per coil)
  • Easy to identify by stamped weight markings on the coil
  • Designed for tilt-in window sashes, including double hung and single hung windows

Installation and Replacement Tips

To replace a window coil balance, first determine the required weight and pocket size by checking the markings on your current balance or referencing your window manual. These balances are secured within the jamb and typically require removing the sash and pivot shoe. Always install one balance per side for single configurations, or two per side for dual/tandem setups. Genuine AmesburyTruth balances help restore original performance and fit perfectly with factory hardware.

For direct replacements, browse solutions like the PivotTrue single coil balance, 984 Series dual coil balance, or the 985 Series single 3/4 inch coil balance for precise weight and compatibility options.

Why Choose Genuine AmesburyTruth Balances

As an authorized retailer, we supply only authentic AmesburyTruth constant force coil balances, ensuring the highest standards for performance, fit, and longevity. Each product is AAMA certified and cycle-tested for long-term reliability, supporting peace of mind for property owners, installers, and anyone needing dependable window repairs.

Frequently Asked Questions

  • How do I know which coil balance I need?
    Check the weight marking stamped on your old coil or refer to your window's documentation. Match both the pocket size (1/2 inch, 3/4 inch, or 1-1/4 inch) and weight rating.
  • Can I mix single and dual coil balances?
    Always match the original configuration,mixing different types on the same window can cause uneven operation and premature wear.
  • Are these balances universal?
    Most constant force coil balances follow industry sizing standards, but always verify compatibility with your window manufacturer or consult our product details for a proper fit.

For additional configurations, see options like the 985 Series tandem coil balance or the Omega 985 Centurion coil for interlocking models and expanded weight support.