A 3D-printable casement window stay (restrictor) that holds the window in a slightly open position for ventilation while preventing full opening.
The design requires no additional bolts, pins, or fasteners for assembly — all parts snap together. Print the components, assemble by snapping, and mount to the window frame using standard screws.
Two hook variants are included to match different frame configurations.
Lever + Mounting Plate combined length: 137 mm.
Specifications
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Total Length (Lever + Plate): 137 mm
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Function: Holds casement window in a fixed partially open position
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Components: Lever, mounting plate, two hook options
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Assembly: Snap-fit, no extra hardware needed
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Mounting: Standard screws (not included)
Material Recommendations
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PETG: Recommended for durability and weather resistance outdoors.
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ASA: Preferred for direct sun exposure (high UV stability, low warping).
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Infill: 40%+ recommended; 4+ perimeters for strength.
Notes & Assembly
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Snap Assembly: Parts click together without tools or pins.
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Installation: Mount plate to frame, hook to window; adjust position as needed.
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Support-free: Designed for FDM printing with minimal or no supports.
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Hardware: Use appropriate countersunk screws for your frame material.
