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Is there a specific direction a keyhole in a doorknob must face?

My son's OCD kicked in earlier when he was installing a doorknob on a new door and he was mad because the wider part was at the bottom. Is this even a thing?

For what it's worth, the doorknob is round, and, as amusing as it would be to ask if it's possible to attach a round doorknob upside down, I'm actually curious if the direction of the keyhole bothers people or if there's a "right" way to do it.

Posted - September 24, 2016

Responses


  • 5354

    It differs for different types of keys.

    Oldfashioned keys are usually mounted so the key should enter the lock with its 'coded' side pointing down.

    But knowing that makes it easy for thieves to make a 'skeleton key' or lockpick that will open such locks.

    So on system (yale) keys the coding is on the top and side of the key:

      and such keys should enter the keyhole with the coded side pointing upwards, this is for practical reasons. inside the lock there is a number of little dowels of different length and the coding push the dovels uwards more or less as the key enters the lock. Dirt in the dowels is the big enemy of such lock so they are mounted with the dowels upwards so any dirt will tend to drop off and fall to the bottom of the lock.

    But once again, knowing that enables thieves to make lockpicks so system keys also often have rifling on the side so only keys with a corresponding rifling can enter the lock.

    And so it goes, locksmiths forge ahead and thieves catch up forcing the locksmiths to move even further ahead, and so on and on.

      September 24, 2016 4:06 AM MDT
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  • 22891

    it wouldnt bother me as long as i could get my key in

      September 24, 2016 3:50 PM MDT
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  • 5808

    "LIKE"

      September 25, 2016 6:17 PM MDT
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  • 270

    It doesn't matter whether the doorknob is round, oval, square or banana-shaped, that has nothing to do with the keyhole. The keyhole should be designed so that the key fits into it when held the right way up.

      September 25, 2016 6:26 PM MDT
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  • 34280
    The bigger part of the hole on top.
      February 3, 2019 12:16 PM MST
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  • 7280
    For the common door lock, the key slot should be oriented so that the teeth of the key are facing up when the key is inserted into the key slot.

    It's not a matter of life or death, obviously, but I read that some 20 years ago.

    Here's a link that you can peruse:  https://boards.straightdope.com/sdmb/showthread.php?t=245886 

      February 3, 2019 1:14 PM MST
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