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A screw extractor is a small, specialized hand tool used by opticians to remove broken or stripped screws from the hinge barrels of eyeglasses. This tool is needed when a standard screwdriver cannot grip the screw head.
read more about screw extractor for eyeglasses ...The extractor becomes necessary when a tiny hinge screw has its head stripped, rusted, or broken off inside the barrel. If the screw cannot be unscrewed, the extractor creates a new grip or gently drills out the stuck metal without damaging the frame or the hinge itself.
The optician selects a miniature extractor bit that is slightly smaller than the screw shaft. The tool is gently inserted into the stripped screw channel and turned counter-clockwise. The extractor grips the metal, allowing the optician to back the broken screw out of the hinge barrels.
Using a screw extractor is safer than using pliers because it isolates the damaged screw. Pliers could twist or damage the hinge barrels or scratch the frame. The extractor applies precise torque only to the metal screw, protecting the frame's integrity.
If the hinge screw on your backup glasses fails, the arm falls off. The speed of repair is important. A quick screw extraction means your backup glasses are immediately functional and ready to provide steady, centered vision correction when your contacts are removed.
No, hinge screws are miniature. Only screw extractors designed specifically for optical use should be used to avoid damaging the frame.
If used carefully, the extractor should remove only the screw, leaving the hinge barrels intact and ready for a replacement screw.
A stripped screw is one where the grooves in the head are worn down, making it impossible for a screwdriver to grip and turn the screw.
If a screw snaps off inside your frame hinge, do not try to glue it. An optician uses a "screw extractor" or a "drill-out" tool to remove the broken shank, allowing them to install a new screw and save your expensive frames.
Review of Optometry. Solving Frame Disasters (reviewofoptometry.com). 2024.
The Vision Council. Optical Fasteners and Repairs (thevisioncouncil.org). 2023.
ABDO. Benchwork and Spectacle Repair (abdo.org.uk). 2024.
Optical Journal. Engineering of the Optical Hinge (opticaljournal.com). 2024.