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Split-Arm Casement Window Operators | Ellipse & Basic Styles for Replacement and Repair

Split-arm casement operators are essential hardware parts designed to open and close casement windows smoothly and securely. These operators, including Ellipse and Basic models, connect the window sash to the frame, allowing for efficient ventilation and reliable sealing. Upgrade or replace your existing window operators to maintain effortless operation and enhance the durability of your windows.
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Split-arm casement operators, particularly the Ellipse and Basic models from AmesburyTruth, provide precise control and smooth movement for outward-opening casement windows. These genuine replacement parts are engineered for long-term reliability, making them a preferred choice for maintaining both residential and commercial properties. The split-arm mechanism distributes force evenly across the sash, allowing users to open, close, and tightly seal windows with minimal effort.

Key Features and Specifications

  • Designed for single-sash casement windows with an outward-opening style
  • Available in left-hand and right-hand configurations for versatile compatibility
  • Common arm lengths include 4.5-inch straight links, supporting a variety of window designs
  • Durable construction with corrosion-resistant finishes to ensure longevity
  • Compatible with both Ellipse (15 Series) and standard split-arm hardware systems

Compatibility and Replacement Guidance

These operators are often used as direct replacements for original hardware found on many North American window brands, including Hurd, Marvin, Cascade, Caradco, Vetter, Sierra Pacific, and others that utilize Truth Hardware mechanisms. Carefully match the handedness (left or right), arm length, and mounting style to your existing operator for a seamless fit. Left-handed models like the Ashland split-arm operator and right-handed options such as the Ashland right-hand operator are readily available. For users seeking a specific linkage, the Ellipse split arm, left hand and right hand version are popular choices for consistent performance.

Installation Tips

Most replacement projects require only basic hand tools such as a screwdriver and pliers. Remove the old operator by detaching the screws from the window sash and frame, then align and install the new split-arm operator in the same position. Always verify the match between the old and new part, especially the arm length and mounting holes. Lubricating moving parts can further extend the life of your operator and ensure quiet, smooth operation.

About AmesburyTruth

AmesburyTruth is a trusted leader in North American window hardware, renowned for precision engineering and robust quality standards. All split-arm casement operators in this collection are genuine AmesburyTruth parts, backed by industry know-how and designed for lasting performance. As an authorized reseller, we ensure that every product offered is authentic and meets original manufacturer specifications.

Frequently Asked Questions

  • How do I choose between left-hand and right-hand operators?
    The hand of the operator is determined by the side of the sash where the operator is mounted when viewed from inside the home. Match this orientation to your replacement part.
  • What window brands are compatible with these operators?
    These split-arm casement operators fit many popular brands, including Hurd, Marvin, Cascade, and others using Truth Hardware components.
  • Can I replace the operator myself?
    Yes, most homeowners or maintenance professionals can perform a replacement with basic tools. Always follow safety precautions during installation.
  • Are color options available?
    Many models come in finishes like white, bronze, and coppertone to match different window frames and interiors.