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Constant-Force Coil Balance

Constant-force coil sash balance for single- and double-hung windows. 300-series stainless steel coil with zinc die-cast cam and glass-filled PA66 shoe. Eight standard capacity ratings (3A through 10K) plus tandem (5C/5CL through 10K/10KL) for heavier sashes.

Also known as

coil balance · tape balance · constant force balance · CF balance

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Key Features

  • Constant-force tension across sash travel
  • Stainless steel coil for corrosion resistance
  • Tandem configuration for heavy commercial sash
  • Direct drop-in replacement for AAMA-cycle-tested windows

Available Materials

300-series SSZinc die-castGlass-filled PA66

Specifications

Capacity Ratings3A, 4A, 5A, 6A, 7A, 8A, 9A, 10K (4–40 lb/pair)
Tandem Variants5C/5CL through 10K/10KL for heavier sashes
Coil Material300-series stainless steel
CamZinc die-cast
ShoeGlass-filled PA66