Mortise Lock Repair & Replacement
Mortise locks are among the most robust door hardware systems ever engineered, but when the internal mechanism binds, the latchbolt drags, or the cam fails to retract, that reputation for strength becomes a liability — you're either locked out of your own space or unable to secure it at all. Reliable San Antonio Locksmith sends trained, insured technicians directly to your door across Shavano Park and the surrounding Hill Country corridor, so you never have to haul a heavy door or disassembled hardware across town for service.
Open 24 hours, 7 days a week · Licensed, bonded & insured
“Whether you own a vintage Baldwin mortise lock set on a craftsman-style home near the Shavano Park city limits, a Corbin Russwin mortise lock on a commercial property along IH-10, or a modern electric mortise lock on a high-traffic access door, our mobile team diagnoses the problem on-site and rebuilds or replaces the lock body the same visit. We confirm an exact up-front price before any work begins — no surprises when the job is done.
What we do
Available 24/7
Day, night, weekends and holidays — a real local locksmith answers and rolls a fully-stocked van.
Fast local response
Based in Shavano Park, we reach the Shavano Park area in well under an hour.
Insured & background-checked
Vetted technicians, up-front pricing, and no surprise add-ons when we arrive.
Damage-free entry
We pick and bypass locks the right way, so most lockouts are solved without drilling anything.
More about our work
Everything you need to know about how we help — at a glance.
What Is a Mortise Lock and Why Does It Fail?
A mortise lock is a self-contained lock body that fits into a precisely cut rectangular pocket — the mortise — carved into the edge of a door. Unlike a cylindrical bored lock that sits inside a round hole, the mortise lock set houses the latchbolt, deadbolt, anti-pick pins, cam, and often an auxiliary deadlatch all within a single steel case. That integrated design is why architects and commercial general contractors have specified mortise hardware on everything from early 20th-century residences in Shavano Park's older neighborhoods to modern office towers near the USAA campus a few miles south. The trade-off is mechanical complexity: more moving parts inside one confined case means more potential failure points.
The most common failure modes we see in the field are a worn or corroded cam that no longer retracts the bolt cleanly, a broken tailpiece inside the mortise lock cylinder that leaves the key spinning freely, a fatigued latch spring that lets the bolt drag against the strike plate, and a stripped case screw that allows the entire lock body to shift inside the pocket. In historic wood doors — common in some of Shavano Park's larger estate properties — seasonal wood movement can compress the mortise cavity and bind the case itself. Identifying whether the failure is mechanical (internal parts), dimensional (door/frame alignment), or electrical (in an electric mortise lock or smart mortise lock) determines the correct repair path, and that diagnosis is what our technicians perform first.
Mortise Lock Repair: Rebuilding the Lock Body On-Site
When the lock body itself is salvageable, rebuilding it is almost always the smarter call — especially for high-grade commercial hardware like Corbin Russwin mortise lock sets, where a full replacement unit can be a significant investment. Our technicians carry rebuild kits for common cam profiles, replacement latch springs, anti-pick pins, and tailpieces, allowing us to disassemble the case, replace only the failed components, reassemble, lubricate with a dry graphite compound, and reinstall — all without removing the door from its hinges when the pocket alignment is still correct. Damage-free service is our baseline standard; we use padded extraction tools and take careful measurements before drilling or cutting anything.
Mortise lock cylinder replacement is a routine part of many repair calls. If a key has been broken inside the cylinder, the plug is worn enough to accept a worn key, or you simply need to rekey after a tenant change at a Shavano Park rental property, we can extract the existing cylinder, repin or swap it, and have the door operational with new keys in one visit. For sliding door mortise lock hardware — hook-bolt mechanisms common on patio doors and pocket doors — we carry hook-bolt cases and replacement strike boxes, because a failed hook bolt on an exterior sliding door is a genuine security exposure that needs same-day attention. Call (631) 380-4138 any time — our dispatch team answers 24/7.
Mortise Lock Replacement: Upgrading the Entire Lock Set
Sometimes rebuilding is not the right answer. A cracked cast case, a door that has been forced and bent the mortise pocket walls, or a client who wants to upgrade to a smart mortise lock or electric mortise lock for access-control integration — all of these call for full replacement. For a mortise lock set exterior door application, we help clients choose hardware that matches the existing pocket dimensions whenever possible, because cutting a new or enlarged mortise in a finished door is a labor-intensive operation. Baldwin mortise lock sets are popular on residential estate doors and offer a wide range of trim styles that suit the architectural character of larger Shavano Park homes; commercial properties with ADA compliance requirements often favor heavy-duty mortise sets with lever trim and 31/2-inch backsets. Our technicians measure the existing pocket depth, backset, and case height before any hardware is ordered, so fit-up issues are caught before installation rather than after.
For access-control upgrades, electric mortise lock and smart mortise lock installations require coordination between the lock body, the door's wiring chase, and the access-control panel. We work on both fail-safe and fail-secure configurations and can advise on which is code-appropriate for your door's occupancy type. After installation, we test the lock body through full electrical and mechanical cycles, verify the request-to-exit sensor functions, and confirm the strike alignment before we leave the site. Every technician who handles these installations has hands-on experience with electrified hardware — this is not a task we perform by reading a spec sheet on-site for the first time.
Emergency Locksmith Response and Commercial Locksmith Services for Mortise Hardware
A sticking mortise lock on a commercial property's main entry is not a minor inconvenience — it is a business continuity and liability issue. Our commercial locksmith team responds to Shavano Park and neighboring areas around the clock, and because we are fully mobile, a technician with the right tools and parts reaches your location rather than asking you to find a way to bring hardware to a shop. We understand that door knob lock failures and mortise failures are often discovered at the worst possible moment: early morning before staff arrives, late evening after the last employee leaves, or mid-Saturday when a property manager is the only person available. That is exactly why 24/7 dispatch is not a marketing phrase for us — it is the operational structure of how our team is staffed and scheduled.
For residential clients in Shavano Park, our emergency locksmith response follows the same standard: verify ownership, assess the lock condition, explain the repair or replacement options, confirm the price, and perform the work. We never apply pressure to upgrade beyond what the situation actually requires. If a latch spring replacement resolves the problem, that is what we recommend and invoice. If the door knob lock on a secondary entry failed at the same time and poses a security risk, we will flag it — but the decision is always yours. To schedule a same-day service call or to reach us in an after-hours emergency, call (631) 380-4138 — we answer 24/7.
Services Our Mortise Lock Team Provides
Our trained technicians handle all of the following on residential, commercial, and multi-family properties across Shavano Park and the greater San Antonio area: mortise lock body extraction and reinstallation, internal cam replacement, latch spring and anti-pick pin replacement, mortise lock cylinder re-keying, broken key extraction from mortise cylinders, tailpiece replacement, mortise case cleaning and dry lubrication, door-edge mortise pocket adjustment and shimming, strike plate realignment and reinforcement, full mortise lock set swap-out for same-dimension hardware, mortise lock set exterior door upgrades with weatherproof trim, Baldwin mortise lock installation and trim swap, Corbin Russwin mortise lock rebuild and cylinder change, electric mortise lock wiring and testing, smart mortise lock pairing and credential setup, fail-safe and fail-secure electric mortise configuration, sliding door mortise lock hook-bolt replacement, pocket door mortise hardware service, high-security cylinder upgrades within existing mortise cases, master key system integration for mortise cylinders, ADA-compliant lever trim installation on mortise sets, multi-point mortise lock diagnosis on French and fiberglass doors, mortise lock cylinder removal after lost or stolen key, mortise hardware assessment for insurance or property sale documentation, and emergency after-hours mortise lock response for locked-out residents and commercial tenants.
Frequently asked questions
How do I know if my door has a mortise lock versus a standard cylindrical lock?
Look at the edge of your door. A cylindrical lock sits inside a round bored hole and the latch mechanism is shallow — you can see it recessed only an inch or so. A mortise lock sits in a deep rectangular pocket cut into the door edge, and the faceplate is typically taller and narrower than a standard latch faceplate, often three to eight inches long. From the face of the door, mortise trim usually has a separate knob or lever and a separate key cylinder, sometimes with a thumbturn above or below. If you are unsure, our technicians can identify the hardware type over the phone if you describe what you see, or we can assess it on-site during any service call.
What factors affect the cost of mortise lock repair or replacement?
Several variables shape the final quote: the type and brand of the existing mortise lock set (a basic interior unit is simpler than a commercial-grade electric mortise lock), whether the repair requires only internal parts or a full hardware replacement, the condition of the mortise pocket in the door edge (a damaged or shifted pocket adds labor), the time of day the call is placed since after-hours emergency service carries a different rate, and travel distance to your location in or around Shavano Park. Parts availability for less common hardware like a vintage Baldwin mortise lock or a legacy Corbin Russwin mortise lock can also affect the quote if specialty components are needed. We confirm an exact price before any work begins so you are never looking at an unexpected invoice at the end of the job.
Can you service an electric mortise lock or smart mortise lock, or only mechanical hardware?
Yes, our technicians work on both electrified and mechanical mortise hardware. Electric mortise lock and smart mortise lock service involves checking the solenoid or motor, testing the request-to-exit sensor, verifying the wiring connections at the door loop, and confirming the lock body cycles correctly through both power and manual override modes. We work on fail-safe and fail-secure configurations and can help with credential setup on smart mortise lock systems that have lost their programming after a power event or control board failure. If your access-control head-end system requires a technician from the system integrator as well, we coordinate our mechanical scope with that timeline.
My mortise lock cylinder keeps turning without retracting the bolt — is that a cylinder problem or a lock body problem?
That symptom almost always points to a failed tailpiece or a stripped cam inside the mortise lock body rather than a defective cylinder plug. The cylinder itself is spinning, which means it is working — the connection between the cylinder's cam and the lock body's actuator has broken. In some cases the tailpiece (the metal finger that extends from the back of the cylinder into the lock body) has sheared off, which is common when a key is forced under ice or when someone uses the wrong key and torques the cylinder hard. Our technicians can extract the cylinder, inspect the tailpiece and cam, and either replace the failed component or install a new cylinder with a correctly sized tailpiece — often without removing the entire mortise case from the door.
Do you handle mortise lock problems on sliding doors and pocket doors?
Yes. Sliding door mortise lock hardware uses a hook-bolt mechanism rather than a standard latchbolt, and pocket door mortise hardware is often a slim-case unit with a privacy turn or passage function. Both are serviced by our mobile team. Hook-bolt failures on exterior sliding doors are a priority call because a retracted or broken hook bolt means the door cannot be secured, which is a direct security concern regardless of time of day. We carry common hook-bolt cases and strike boxes in our service vehicles so most sliding door mortise lock repairs are completed the same visit.
Is it better to repair or replace a failing mortise lock set?
The honest answer depends on three things: the extent of the internal damage, the age and quality of the existing hardware, and your goals for the door going forward. A high-quality commercial mortise lock set with a cracked latch spring and a worn cam is almost always worth rebuilding — the case, cylinder, and trim are still sound, and replacing only the failed internal components restores full function at a fraction of the cost of new hardware. A lower-grade mortise lock with a bent case, a corroded bolt, and worn cylinder is usually a better candidate for replacement, especially if you want to upgrade to a mortise lock set exterior door rated for weather exposure or to add an electric or smart mortise lock function. Our technicians will give you an honest assessment of both paths before you decide.