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Here we, Nash and Dara, are again with a little bit of a pickle around the shops. We've had a bathroom in the shops that has been there before we moved in, and has never had a working key. I've finally gotten tired of it and wanted to re-pin it to a key that doesn't match anything else and that I've had in a drawer for a few years. We invested in a re-pinning set a while back; a decent sized one is pretty cheap and will last you quite a while.

This is something that I've done for a while, but you can do with little to no experience. If you know how to use tweezers, you can re-pin a lock. Once you get used to it, you can re-pin a lock in 5 minutes with no hiccups.

I sometimes have issues with the process, and have never been able to find a good tutorial online; so, here is a rather in-depth step-by-step guide for those of us who need more visuals.

The tools you'll need are:

Kwikset Re-Pinning Set
Small Screwdriver
Doorknob with lock.

Step 1: Accessing the Tumbler to Be Removed

Step one, getting to the tumbler to remove it. The tumbler is the part that you insert the key in and turns to unlock the door.

Most re-pinning sets come with something called a "Removal Tool." It's a long, Y-shaped piece of steel that is one of the most useful parts of the kit.

Insert the thin end of it into the spindle portion of the knob. It's a vaguely cylindrical piece of metal with a half-cylinder surrounding it. Twist the end so that the tab at the base of the spindle is perpendicular to the half-cylinder (Pic 2).

Then, take a small screwdriver (or a larger one, if you can fit it in) and find a recessed little tab directly behind the half-cylinder (Pic 3). If you push it in with the body of the screwdriver, it will unlock the spindle and you can pull it out (Pic 4).

Once more, take the removal tool and insert it into the whole where the spindle once was. It might take a little wiggling, but if you insert it perpendicular to the half-cylinder, it should get resistance, and if you push a little, it should feel springy (Pic 6).

If you flip the entire thing you're holding upside down and push it onto a flat surface (Pic 7), you can then push down and the tumbler/cylinder portion should come out (Pic 8).
Well done, but note that not all cylinders have a removable top. Thin steel shims can be inserted from the cylinder/plug gap at the rear, while gently pushing a key in and out (or using a pick to push the pins to the shear line.

About This Instructable

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Bio: Hi, we're Dara and Nash. Industrial designers, tinkers, and mayhem builders. Follow our travels.
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