Due to poor mechanical design, the spring hinge of my glasses broke twice. Once while still under warranty, and it got exchanged for free. Then once again now, but the warranty is over. Being self-darkening prescription glasses, they were not cheap. Gosh...

So I decided to repair them using 1mm thick steel string (*) to form a hinge and temple in one single piece.

This method may not apply to any glasses. It depends on how the hinge is made.

(*) that is used in RC models to transmit the force from servos to controls.

Step 1: Make a New Hinge

  1. With pliers, make a loop with the steel string. You can use a small screwdriver to roll the string around.
  2. The internal diameter must correspond to the original hinge screw.
  3. Cut out the excess string, and hammer the loop flat.
  4. Adjust the loop so that it turns smoothly into the hinge, with proper angular limitation. This is the only tricky part.
  5. Assemble using the original hinge screw.
<p>This instructable is the one that inspired me to buy the How to Fix Anything book from Instructables. Thank you for your creativity! </p>
<p>Oh thank you for this nice comment. I feel very honored!</p>
<p>Interesting and creative. Maybe you could develop your own line of spectacles. Or, anyone that relies on glasses for near vision could get the new KARMA Inlay. It's a procedure that repairs your near vision so that you don't need glasses anymore.</p>
<p>cool ideas</p>
<p>Kudos! I like the idea not to give something up just because they are broken. A little tip if the ends are scratching: Old wire-insulation or shrink tube over the complete end! And a good source for steel strings: old bike spokes, if the are to thick at the beginning: a hammer and file will do it!</p>
I've thought about different ear pieces for my glasses, and now I wonder how easy it would be to just fashion my own forms that I can swap in and out depending on my needs. <br> <br>Every day I find people hacking things I never would have considered &quot;hackable&quot; it's very inspiring!
In the <a href="http://www.instructables.com/id/Refashion-Glasses-with-Lego/" rel="nofollow">follow-up</a>, I covered the steel temples shown here by lego bars.<br> <br> But: I would <u>not</u> do this with undamaged glasses! It takes a lot of time to adjust the glasses so that they sit comfortably, and with the proper optical angle!
Gotcha, I'll take that under consideration. Maybe there's a more minor way I can modify them to achieve what I'm going for
Thanks for this instructable. <br>Im wondering if it would be possible to grind out a slot along the inside edge of the old arms and then cut off the new spring steel arm shorter and glue (epoxy or hot glue) the old designer arms over the new spring steel arm ? <br>Then your glasses will look perfect to everyone else.
It really depends on the old temples. You will first need to grind off the remains of the old hinge. Then, the new steel bar's outer side would align to the old temple's inner side, so making a grove would unalign the old temple. Or, the groove's depth would progressively increase, from zero at the hinge, to maximum at the earpiece...<br> <br> A temple is subject to much constrains and torsion, so you would probably need to stick the old temple to the steel bar up to some portion of the ear piece, and use epoxy, at least. Hot glue will not hold.<br> <br> Also, keep in mind that modern hinges are quite sophisticated and incorporate a spring, allowing to go over 90&deg;. When gluing the steel bar to the old temples, you should make sure to allow the exact angle needed to comfortably wear the glasses.
That's a pretty nice solution for the hinge. If you want to reuse the original temple, apply your hinge design but cut the &quot;temple&quot; end to a much shorter length, maybe 3/4-1 inch. Use an appropriate sized and colored heat shrink tubing to attach that to the original temple.
Thanks for sharing this information! It will be handy when I need it.<br>Sunshiine
Thanks for this, it's great. I've a lot of broken specs but kept the lens part, too good to dump. This has given me an idea too and if it works I'll post it.

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