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How do I identify my door's hand and correctly adjust a mortise lock?

1Answers
BriannaDella
12/17/2025, 01:03:59 PM

Determining your door's hand is essential for correctly installing and using a mortise lock, ensuring it functions smoothly and securely. Here's how to adjust the CAL-ROYAL SC Series SC8480 Heavy Duty Mortise Lock, based on the door's hand:

  1. Changing the Latchbolt Handing:

    • If the latchbolt's hand doesn't match your door's hand, begin by removing the fixing screw and carefully pulling the latchbolt out of the lock case.
    • Rotate the entire unit so that the bevel on the latchbolt aligns with the desired door handing.
    • Reinsert the latchbolt into the lock case, ensuring it's properly positioned, and securely fasten it.
  2. Setting the Outside Hand of the Lock Case:

    • Locate the two set screws situated at the base of the HUB, one on each side of the lock.
    • Remove the set screw that's on the side facing the secured or outside (keyside) of the door, and leave the set screw facing the interior side (inside).
    • Make sure the lock's hub is seated squarely in relation to the lock's body. Either arrow 1 or 2 on either side should point directly to the set screw.
    • If a set screw is accidentally removed, re-insert it by pushing the spring plate aside, and holding the hub by using the spindle a couple of degrees until the spring plate is out of the way. Then, re-insert the set screw and fasten it securely.

By carefully following these steps, you can successfully configure your mortise lock to match your door's hand, enhancing its functionality and your home's security.

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