3D printing of keys

Companies have been offering 3D-printing services for keys for a while now. Apparently, not everybody is aware of this, so when Jos talked about this at HOPE, it caused a bit of a stir. Wired wrote an article about it that you can read at http://www.wired.com/2014/07/keyme-let-me-break-in/.

The article describes professional key duplication services. A few weeks ago, TOOOL member Tom decided to spend an afternoon to see if he could make a model of a standard key to be printed on a cheap consumer grade 3D printer. Here is the first result:

3D key

And here’s a picture of two printed keys with an original. The cuts were measured and printed.

3D keys

Here you see the key is working, although you can feel you have to be careful not to apply too much force.

3D key working

The thing the consumer grade printer has most problems with, it first printing separate blobs of plastic that only connect to the rest of the key as the profile is being printed. This means the key had to be lightly filed after printing, to make it operate the lock.

4 Responses to “3D printing of keys”

  1. Jan says:

    To avoid the mentioned problem with the profile, wouldn’t it be easier to rotate the process by 90 degrees, start from the straight edge of the keyway, and work your way up to the teeth?

  2. jos says:

    Jan: Correct. That is an easy way to print. Downside is that the teeth are less sturdy this way. But for a normal key (non-bumpkey) that shouldn’t be a problem.

  3. Paul Hewson says:

    is there a not a legal consequence to 3D printing a patent or trademark protected key profile ? Surely the manufacturers of legally protected key profiles will have something to say.

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