Mortise Lock Repair & Replacement

A mortise lock is a self-contained lock case — typically two to four inches deep — that slides into a mortise, or pocket, cut into the door stile. Inside that case you'll find a spring latch, a deadbolt cam, a spindle hub for the door knob or lever, and in many older installations a separate mortise lock cylinder threaded into the face of the case. The cylinder itself is what accepts your key; when it turns, it rotates an internal cam that throws or retracts the bolt. Because all of those parts live inside the door, wear, humidity swings, and decades of seasonal wood movement take a toll that you often can't see until the lock suddenly stops working entirely. Guilford County's mix of hot, humid summers and cold, dry winters is particularly hard on the wood surrounding these cases, causing doors to rack in their frames and put uneven stress on latches that were already worn thin.

Older Baldwin mortise lock hardware and legacy Corbin Russwin mortise lock units from the mid-20th century are still found regularly in Greensboro's Fisher Park neighborhood and in commercial buildings along South Elm Street. These are high-quality mechanisms, but internal parts — the latch spring, the deadbolt cam follower, the tailpiece connecting the cylinder to the case — fatigue over time. A sticking latch usually means either a misaligned strike plate, a swollen door stile, or a collapsed latch spring inside the case. A loose trim assembly most often points to stripped set screws on the spindle or a cracked escutcheon plate. Our technicians are trained to differentiate these causes without unnecessary disassembly, saving your original hardware whenever the repair makes structural sense.

When our mobile unit arrives at your door, the first thing we do is a physical assessment — checking door alignment, frame integrity, and the condition of the strike plate before ever touching the lock case itself. A door that has dropped on its hinges will bind the latch tongue regardless of how sound the internal mechanism is; fixing only the lock without correcting the alignment means you'll call again in six months. Common mortise lock repairs we perform include: re-tensioning or replacing the internal latch spring, reshaping or replacing a worn latch tongue, re-threading or replacing the mortise lock cylinder when a key no longer turns smoothly, tightening or replacing the spindle and rose assembly, adjusting or relocating the strike plate box, and lubricating internal cams and followers with a dry graphite or PTFE-based lubricant appropriate for vintage hardware. We document what we find, explain your options in plain language, and let you make the informed choice. If you need us mid-afternoon or at two in the morning, our 24/7 availability means the call gets answered and a technician is dispatched — no answering machine, no next-business-day delay.

For commercial properties — retail storefronts, office buildings, multi-tenant residential — a broken mortise lock set on an exterior door is both a security gap and a liability. Our commercial locksmith experience means we understand keying systems, master key hierarchies, and the need to keep a business operational during a repair. We work damage-free where possible, protecting door finish and avoiding unnecessary wood removal. When a repair is not the right call — say, the case is cracked, a critical cam has sheared, or the door itself has been forced — we'll tell you honestly and source a matching or compatible replacement case, including modern electric mortise lock and smart mortise lock options if you want to upgrade access control at the same time. Call (631) 380-4138 — we answer 24/7 — to get a technician on the way.

Replacing a mortise lock set is more involved than swapping a cylindrical lockset because the replacement case must match the existing mortise pocket dimensions — typically defined by case height, case width, backset, and the location of the spindle hub and cylinder bore. In older Guilford County homes, these measurements often correspond to legacy American standards that are no longer the default at big-box stores, which is why a trained locksmith — not a general handyman — is the right call. We carry a curated stock of cases in our mobile units and can source specific backset sizes, lever or knob configurations, and finishes that match original trim. For historic properties in areas like Greensboro's Aycock Historic District, preserving the visual character of original door hardware matters, and we take that seriously.

If you're upgrading rather than restoring, we can discuss modern alternatives. An electric mortise lock integrates a solenoid or motor inside the same case footprint, allowing credential-based or remote access — a popular choice for small businesses and multi-family properties transitioning away from mechanical keys. A smart mortise lock pairs wireless access control with the robust case geometry of a traditional mortise, offering the security depth of the old design with contemporary convenience. We also handle sliding door mortise lock replacement, which uses a different case profile designed for the thin stile of a sliding panel door. Whatever direction you choose, the factors that shape your final quote are straightforward: the lock model and case dimensions required, any parts that need special ordering, the time of day the work is performed, and travel distance to your location. We provide an exact price before any work begins — no hidden fees added after the job.

Colfax Locksmith is not a dispatch-center franchise — we are a family-owned locksmith business rooted in this community, with a physical shop location you can visit and mobile units that reach every corner of Guilford County. We serve Greensboro, Winston-Salem, High Point, and the surrounding communities, which means our technicians know local roads, local neighborhoods, and the local housing stock. That matters when a homeowner calls about a failing door knob lock on a 90-year-old craftsman in the Lindley Park area — our team arrives with context, not just a tool bag.

We operate 24/7 because lock failures don't wait for business hours. Whether it's an emergency locksmith call at 3 a.m. because a broken latch has left a door unable to close, or a scheduled appointment to upgrade the mortise lock set on an exterior door before a tenant moves in, our trained and insured technicians treat every job with the same thoroughness. Secure your business, protect your home, and preserve the character of your historic hardware — that's what we're here for. Call (631) 380-4138 any time, day or night, and we'll confirm availability, walk you through what to expect, and dispatch a technician with the right tools for your specific lock.

Our full service range covers: mortise lock case repair, mortise lock cylinder rekey, mortise lock set replacement on exterior and interior doors, sliding door mortise lock repair and replacement, electric mortise lock installation, smart mortise lock installation and programming, vintage Baldwin mortise lock hardware restoration, Corbin Russwin mortise lock parts sourcing and installation, master key system design for mortise-keyed properties, door alignment correction and strike plate adjustment, residential deadbolt installation, cylindrical knob and lever lock replacement, high-security lock upgrades, key duplication for mortise cylinders, emergency lockout response for residential properties, emergency lockout response for commercial properties, safe opening and combination changes, car lockout service, transponder key cutting, key fob programming and replacement, ignition lock cylinder repair, mailbox lock replacement, padlock replacement and rekeying, access control system installation, and intercom and keypad entry setup. Whether your need is a single sticking latch or a full property rekeying after a change of ownership, our team is equipped to handle it in one visit whenever possible.