Yes, you can replace a mortise lock with a cylindrical lock assembly. You'll just have to remove the mortise lock first and fill the excess space that might appear once the cylindrical lockset is in place.
Mortise locks can be replaced with standard cylinders. Mortise lock is the name given to the large, rectangular locks that fit into a slot, or "mortise" in the edge of the door. These locks were common at the turn of the twentieth century and are still in use today.
Start by removing the old hardware. This can usually be done by removing a few screws in the door knobs, around the face plate, and the lockset. Fit the new lock body into the old mortise. If it's a tight fit, try loosening the opening with a chisel to ensure the door doesn't split during the installation.
Mortise locksets cost: $125–$175.
In a mortise lock you can unlock both the latch and deadbolt locks by turning only one lever, but in cylindrical locks you have to lock and unlock the deadbolt and the latch separately.
Home Depot does rekey doorknobs, cylinder, and deadbolt locks at selected store locations. Customers can expect to pay $5 to $50, and Home Depot will rekey locks purchased from the store or other retailers/brands, including Schlage and Kwikset locks, provided you can offer the correct keys.
We've extensively researched this topic and here's what we found out. Yes, you can replace a mortise lock with a cylindrical lock assembly. You'll just have to remove the mortise lock first and fill the excess space that might appear once the cylindrical lockset is in place.
Mortise cylinders have a threaded exterior and a cam. And rim cylinders have bolts and a stem that projects out into the door. Besides that, mortise lock bodies fit inside the door, and the lock bodies of rim cylinders can be found on the outside of the door.
Are mortise door locks universal? Yes, a mortise lock set and mortise door lock is universal and can easily be used to replace most other lock sets, especially on an older door.
Mortise lock cutouts may weaken the structure of the door– yet mortise locks are mysteriously stronger than bored cylindrical locks! They give more leverage and last longer than cylindrical locks, and their versatility allows more architectural conformity to existing security hardware.
Fill the smaller holes in the door's face with solvent-based wood filler, using a flexible putty knife. Allow it to harden completely, following label instructions for best results. Sand the door smooth once the glue is dry.
Kwikset/Schlage 1-1/8" 5 Pin Mortise Cylinder.
Product Description
This standard mortise lock features solid-brass face and strike plates. It comes equipped for a privacy thumb turn, and is reversible for left- or right-hand doors. With three popular finishes to choose from, it is suited for almost any decor.
Unlike the mortise lock which requires a rectangular pocket to be cut into the door, the deadbolt requires 2 cylindrical holes to be cut into the door (bored cylindrical mounting).
Remove the spindle, cylinder and trim pieces. Unscrew top- and bottom-most screws on lock faceplate and remove lock from door. Place new mortise lock case in existing hole in latch-edge of door and screw into place. Install spindle into handle and tighten set screw.
Rekeying your lock is almost always cheaper than replacing a lock. This is because of the cheaper price of the key pins inside the locks, whereas when you replace a lock, you are paying for all brand-new parts.
When you rekey a lock by yourself, you will need to purchase a rekey kit that is specific to your brand of doorknob, lever, or deadbolt. You will receive several keys (often between three and six keys), all identically cut.
Lowe's are able to rekey locks in certain stores. Customers can bring in their locks (if an eligible brand to be rekeyed at Lowe's) and have their locks rekeyed for around $5. Lowe's also offers rekeying kits so customers can rekey their own locks at home.
Kwikset subsequently became part of the Hardware and Home Improvement (HHI) Group of Stanley Black & Decker, which also owns lockset manufacturers Weiser and Baldwin.
Door knob cylinder locks: some safety tips
For all that, knob cylinder locks are not without risk. If you have a glazed door, all a burglar needs to do is smash a small glazed section to open your door from the inside out. So the safest thing to do is to also replace that glazed front door with a non-glazed door.