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    • Hung Window Solutions
    • Block & Tackle Balances

    APEX®

    An extended travel Block & Tackle Balance for sideload applications: Caldwell’s APEX® balance is available with multiple end guide configurations, for different jamb sizes.
    APEX® succeeds AAMA Class 2 with a weight capacity of 2-53 lbs.

    Product Features

    • Extended travel allowing for egress windows
    • Caldwell’s Music Wire Springs offer more consistent and dependable output
    • Remarkably consistent & smooth operation
      • Independently rotating pulley wheels
      • Stronger hemmed channel edges
      • Parked mounting hook remains centred
    • Elongated bottom guides provide design and application flexibility
    • End Guide Configurations to easily fit into your jambs
      • Winged and Non-Winged Options
      • Single or Dual Springs to fit your weight requirements
    • Optional 15P19 HD Take Out Clip to ease sash removal
    APEX®

    APEX®

    APEX®

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    BALANCE SIZE .66” x .645”
    TRAVEL (EXTENSION) CL – .7” + 2.5 OT
    TRAVEL (RETRACTION) .25” min.
    SASH WEIGHT CAPACITY 2 lbs - 53 lbs
    EGRESS CAPABLE Yes
    BALANCE LENGTH (MIN) 7 inches
    BALANCE LENGTH (MAX) 59 inches
    BALANCE TYPE Sideload
    CHANNEL PROFILE Rectangular
    USING JAMBLINER No
    MOUNTING METHOD Hook Mount
    TOP GUIDE Multiple End Guide Configurations
    BOTTOM GUIDE Multiple End Guide Configurations
    SINGLE OR TANDEM APPLICATION Single
    CORD TERMINAL 15R27 Hook
    COLOR Mill
    FINISH Galvanized
    BOX QUANTITY 50

    The balance size is equal to the channel size minus one.
    Example: a 33 inch channel requires a #32 balance.

    • APEX™ Balance Installation Procedures(PDF, 842 KB)
    • APEX™ Point Loading Instructions(PDF, 520 KB)
    • APEX™ Travel Characteristics(PDF, 301 KB)
    • APEX® Limited Travel Weight Capacity Chart(PDF, 20 KB)
    • APEX® End Guides - Dual Spring Non-Winged Guide Options(PDF, 1 MB)
    • APEX® End Guides - Dual Spring Winged Guide Options(PDF, 1 MB)
    • APEX® End Guides - Single Spring Guides(PDF, 699 KB)
    • APEX® Weight Capacity Chart(PDF, 299 KB)