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Casement Window Operators

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Casement Windows and Window Arm Replacements for Casement Window Operators


Casement windows are windows that attach to the window frame with a hinged window arm. Unlike windows that you open and close by sliding them up and down or left to right, most casement windows open and close with a hand crank. However, in some cases, you just push and pull casement windows to open and close them. As a general rule, casement windows open by swinging outward to the left or right, allowing for full top-to-bottom ventilation and airflow.


Because of their design, casement windows are easy to clean. By simply disconnecting the window arm, you can often clean the interior and exterior glass from inside your home, without having to climb a ladder outside. Check out our guide — How to Clean Windows — for tips on making your own cleaning solution.


Frequently Asked Questions


Q: How does a casement window operator work?

A: A window arm and linkage hardware attach a casement window to its frame. To open or close a window with a casement window operator, you turn the crank. Turning the casement window crank clockwise will open the window; turning it counterclockwise will pull the window shut. Since they use a geared crank that can wear out over time, you’ll want to inspect casement window operators periodically for wear. You should also lubricate the gears regularly.


Q: Can you replace a casement window operator?

A: Yes, you can replace casement window operators. Casement window crank replacement is a fairly straightforward repair and an easy do-it-yourself project. You just open the window, disconnect the window arm, remove the crank handle, unscrew the operator from the window frame and, finally, install the new operator.


Casement window operators for windows that open to the left differ from those for windows that open to the right. So be sure to get the correct replacement model.  

Frequently Asked Questions