Prime-Line 9.0-in Aluminum Casement Window Operators

Restore smooth window operation with the Prime-Line H 3514 Left-Hand Casement Operator. Designed as a replacement for worn, damaged, or difficult-to-operate window hardware, this operator is commonly used on older steel-framed crank-out casement windows. It mounts on the left side of the window when viewed from inside the home looking outward, helping return proper sash control and reliable ventilation performance. Built for durability, this operator features a diecast housing and crank handle paired with a 9 in. hardened steel arm and precision worm gear drive mechanism. The aluminum-painted finish helps resist corrosion and wear while maintaining a clean appearance that blends with existing window hardware. Engineered for dependable everyday use, the robust gear system delivers smooth, controlled opening and closing of compatible casement window sashes. This replacement operator installs using two pairs of mounting holes spaced 3-7/8 in. and 4-3/4 in. on center, matching many older steel window designs. A matching crank handle and installation fasteners are included, providing a complete replacement solution. Before purchasing, compare the mounting pattern, spindle size, arm length, and overall operator configuration with your existing hardware to ensure proper compatibility.