Can You Install a Lockin Smart Lock on a Mortise Lock or Only a Deadbolt?
If you are asking, “Can you install a Lockin smart lock on a mortise lock or only a deadbolt?” the practical answer is: Lockin’s Veno family is designed around compatible standard American deadbolt preparation, not a generic mortise lock body. A mortise lock, multipoint lock, narrow-stile lock, or interconnected lock should not be treated as a drop-in fit.
For a current Veno Pro or Veno Plus purchase, start by confirming that your door has a compatible single-cylinder deadbolt, the required holes and backset, and the rectangular latch-faceplate preparation shown in the model guide. If your door has a mortise case, stop before removing hardware and send the exact model, measurements, and photos to Lockin support.
Why the mortise-versus-deadbolt distinction matters
A deadbolt and a mortise lock do different mechanical jobs. A standard deadbolt is a separate lock body installed through the door, with a crossbore through the door face and a latch or bolt that travels into the frame. A mortise lock uses a larger case recessed into the door edge and often combines the latch, deadbolt, lever, and other functions in one body.
The Veno installation workflow replaces the compatible deadbolt hardware and connects the interior and exterior assemblies through the existing deadbolt preparation. It is not an interior-only retrofit that simply turns an existing mortise thumbturn. A mortise case can therefore fail the fit even when the door is the right thickness.
What Lockin’s current Veno fit information supports
Lockin’s current smart-lock installation guide says the Veno series supports the standard American deadbolt type and lists mortise locks as not compatible. The current Veno Pro and Veno Plus fit requirements also make the preparation more specific than the phrase “standard door” suggests.
| Check | Veno Pro / Veno Plus fit information | What it means at the door |
|---|---|---|
| Lock type | Single-cylinder deadbolt preparation | A mortise, multipoint, interconnected, or narrow-stile body needs separate confirmation; do not assume it fits. |
| Door material | Wooden doors listed on the model pages | Confirm the exact model page if your door is metal, composite, or another material. |
| Door thickness | 1 3/8–2 11/64 in (35–55 mm) | Measure the slab itself, not the trim. |
| Crossbore | 2 1/8 in (54 mm) on the current Veno Pro and Veno Plus product information | Measure the large hole through the face of the door. |
| Backset | 2 3/8 or 2 3/4 in (60 or 70 mm) | Measure from the door edge to the center of the crossbore. |
| Door-edge hole | 1 in (25.4 mm) | Measure the opening around the deadbolt latch at the edge. |
| Latch faceplate | Rectangular cutout; round faceplate cutouts are listed as incompatible | Look at the door edge with the door open. |
| Latch pocket depth | At least 1 in (25.4 mm) for the Veno Pro and Veno Plus pages | Check the frame-side space before installation. |
These are fit screens, not a guarantee that every door will work. The exact product page and quick-start guide control if their instructions differ by model or revision.
How to tell what you have before buying
Keep the door open and inspect the edge and both faces. Use a tape measure, ruler, and phone camera. Do not remove a lock from a rental, fire door, shared exit door, or institutional door just to expose a measurement without the owner’s or facilities team’s permission.
- Look at the door edge. A separate rectangular deadbolt latch faceplate above or below the handle points toward a bored deadbolt setup. A tall mortise faceplate with a lever, latch, and deadbolt openings in one long plate points toward a mortise lock.
- Check the lock body. A single-cylinder deadbolt normally has a separate exterior key cylinder and an interior thumbturn. If the lever and deadbolt are joined in one case, it is not the same preparation.
- Measure the five basics. Record door thickness, crossbore, backset, door-edge hole, and latch-pocket depth. Photograph the latch faceplate, strike, handle, trim, glass, door stop, and any second or storm door.
- Check movement before any smart hardware is installed. With the door open, the bolt should extend and retract smoothly. A smart lock cannot correct a door that needs lifting, pushing, or pulling to align.
- Compare one exact model. Do not use a Veno Pro measurement as proof that a Veno, Veno Go, or solar model has identical requirements. Lockin’s quick-start guide library provides model-specific resources.
What if your door has a mortise lock?
Do not drill, file, or enlarge the mortise case or door openings based on a generic smart-lock diagram. That can damage the door, weaken the installation, affect a fire or egress assembly, and make restoration harder.
Instead, send Lockin support the lock model if known, door thickness, backset, crossbore or mortise dimensions, latch-faceplate photos, strike photos, and the exact Veno model you are considering. Lockin’s FAQ and support resources are the appropriate next check when the existing hardware is unusual or the measurements are borderline.
The safe conclusion is not “all mortise doors can never use any smart lock.” It is narrower: the published Lockin Veno deadbolt fit should not be applied to a mortise lock without model-specific confirmation. A professional door or locksmith review may also be appropriate where the lock is part of a multipoint, fire-rated, commercial, or shared-entry system.
Deadbolt or mortise: the buying decision in one minute
Choose a Lockin Veno deadbolt candidate only when your door passes the exact model’s preparation checks and the existing deadbolt operates smoothly. Pause and verify before ordering when:
- the door has a mortise, multipoint, interconnected, or narrow-stile lock;
- the latch faceplate is round rather than rectangular;
- the backset is not 60 or 70 mm;
- the door thickness or hole sizes fall outside the model range;
- the handle, trim, glass, door stop, or storm door blocks the assembly; or
- installation would require new drilling, cutting, filing, or other unapproved door work.
For a compatible deadbolt door, continue with the exact Lockin user-manual library, keep the original hardware until the new lock is tested, and do not close the door until mechanical and electronic entry methods have been checked. If your starting point is a mortise lock, treat support confirmation as a prerequisite—not as a detail to solve after checkout.