It has happened to many of us, a cheap office chair, broken after a couple of months of normal use. Normally there isn't an easy fix to this problem, glue doesn't usually has what it takes to repair the damage, frustration ensues after each successive repair, until an otherwise perfectly good chair is thrown away in a fit of rage. This isn't only costly, but also wasteful.

I too had to deal with this, I even resorted to a custom aluminum bracing. But when the other armrest broke I was fed up, so I decided to let my lazy side take over, as Bill gates once said, “I choose a lazy person to do a hard job. Because a lazy person will find an easy way to do it.”

And so I came up with an easier solution which was just as resistant as my more complicated approach, keeping materials and effort to a minimum.

Step 1: Materials

To perform this fix you only need two things:

Metal Coat Hanger
Epoxy

That's it, nothing else!

You'll also need a pair of pliers and a small drill (with a drill bit around 2.5mm in diameter)

Step 2: Disassemble

Remove the cracked armrest (or other part) from the chair, it is usually attached with hex screws.

Step 3: Cut a Piece of Coat Hanger

Take your coat hanger and cut a section of around 30cm, then peel the plastic cover. Find a drill bit that is slightly thicker than the metal wire for the next step.

Step 4: Drill Some Holes

Make four equidistant holes (or more, depending on your needs and the shape of the part). Make sure to leave some space between the holes and the cracked section, otherwise it might crack again.

Step 5: Make Some "staples"

Bend the coat hanger into "staples" with your pliers. Make sure they are a tad smaller than the distance between the holes, that way the fit will be tight and strong.