Non-destructive entry first, always - and we re-key Schlage, Kwikset, and Baldwin locks on the spot while you watch
You get a price before we start. It does not change when we arrive. No surprises.
Medeco Locksmith in Detroit, NY | Novak Lock & Security
Novak Lock & Security provides independent Medeco locksmith service across Detroit, from rekeying and cylinder rebuilds to our Lock Installation & Rekey in Detroit. We’re not a Medeco factory service center and we don’t claim to be. What we offer is hands-on time with Medeco M3, Biaxial, Maxum, and KeyMark hardware in the city’s actual conditions: pre-WWII mortise cases, brick frame heave, and freeze-thaw winters. When a Medeco cylinder binds in a 1930s Corbin body, we know exactly what we’re looking at. Call (331) 310-8471 and the dispatcher will quote a firm price before anyone is dispatched. That price is the price on the invoice, per Haven Standard Clause 1.
Why Detroit Residents Choose Us for Medeco Service
Most locksmiths can cut a Medeco key. Far fewer can diagnose a Medeco cylinder that’s binding inside a 90-year-old mortise case in a Bagley brick bungalow after a January cold snap. That distinction matters here more than it does in a city with newer housing stock. Detroit has tens of thousands of pre-war homes still running original Corbin and Yale mortise locksets, and we’re called to retrofit them with high-security cylinders on a regular basis. Daniel Novak, our owner, learned the mechanical side of this trade at Queensborough Community College and cut his teeth on New York City doors before expanding into Detroit’s rehab market. The name on the van is the same name on the invoice. We don’t have a parts runner who’s never seen a sidebar spring; we have techs who rebuild Medeco cylinders in their sleep.
Common Medeco Locksmith Problems We Solve in Detroit

- Cylinder jam from freeze-thaw frame shift. Detroit brick door frames heave during freeze-thaw cycles. When the frame moves a few millimeters, a Medeco tailpiece inside an old mortise case binds against the deadbolt throw. The lock works in summer and seizes in February. We pull the cylinder, inspect the tailpiece contact point, and replace it with a factory Medeco part if it’s worn.
- Worn sidebar springs causing key refusal. After years of daily use, the sidebar springs inside an M3 cylinder lose tension. The key goes in, goes all the way, and the plug won’t rotate. We rebuild the cylinder with a new Medeco sidebar and springs rather than replacing the whole cylinder when it’s worth doing.
- Forced-entry cylinder replacement on rehabbed houses. A property that sat vacant in Grandmont-Rosedale for years will often have a Medeco cylinder with no key, a broken plug, or a frozen core from weather exposure. Since no records of the original bitting exist, the cylinder gets replaced entirely and rekeyed to a fresh set of keys, with the owner receiving a written bitting record.
- Frozen lubricant seizing pin stacks. During Detroit cold snaps, WD-40 and graphite residues inside Medeco cylinders turn to sludge. The pin stacks seize and keys snap off if force is applied. We hit the cylinder with a proper de-icer, let it work, then clean and re-lubricate with a cold-rated lock lubricant. Do not force a frozen Medeco cylinder; that’s how broken keys happen.
- Deadbolt strike misalignment after frame settling. Many Detroit homes on clay soil settle unevenly over decades, and the deadbolt throw no longer lines up with the strike plate. A Medeco deadbolt with tight tolerances won’t tolerate the same slop that an entry-grade Schlage might. We shim the strike or adjust the mortise pocket to restore full, clean throw.
Medeco Service in Detroit: What Local Conditions Mean for Your Equipment
Here’s the thing no generic Medeco page will tell you: Detroit’s pre-WWII brick bungalows in Bagley and Grandmont-Rosedale often still carry their original Corbin mortise cases, and a Medeco retrofit cylinder dropped into that case becomes a hybrid. The Medeco cylinder is built to modern tolerances. The Corbin case was machined in the 1920s or 30s. Heat expansion, cold contraction, and eighty years of hinge sag all move the geometry around. When the case shifts even slightly, the Medeco tailpiece no longer lines up with the deadbolt throw, and the cylinder binds. Fixing that requires someone who understands both halves of the hybrid: the Medeco internals and the old mortise body. Most suburban locksmith shops have never needed to source a Corbin tailpiece part or shim a 90-year-old strike pocket, so they’ll tell you to replace the whole door assembly. We’d rather do the mechanical work and keep the original hardware functioning. That’s the entire point of putting a high-security cylinder in an old Detroit house in the first place: keep the bones, upgrade the security.
Medeco Models & Products We Service in Detroit

We service the full Medeco line that Detroit homeowners and small commercial tenants actually run: Medeco sales & service covers Maxum, M3, Biaxial, and KeyMark. Maxum is the current flagship for residential and light commercial deadbolts, with the same high-security keyway Medeco built its name on. M3 was the workhorse for years and we still see it in nearly every Detroit rehab. Biaxial is the older standard, and KeyMark shows up on commercial doors and institutional accounts. When we repair, we use factory-original Medeco pins, springs, sidebars, and tailpieces. Aftermarket parts don’t hold high-security tolerances, and a lock that fails its own precision isn’t securing anything. We carry a working inventory of Medeco OEM parts on our trucks for same-day turnaround on most cylinder rebuilds, which matters when you’re standing in a cold front hallway in East English Village at 9 p.m.
Medeco Service Pricing in Detroit
Medeco service in Detroit typically runs like this: cylinder rebuild with OEM sidebar and springs, $140-$210. Full cylinder replacement with new factory-cut keys, $180-$280. Deadbolt installation into an existing mortise prep, $160-$260 plus hardware. Rekeying an M3 or Biaxial cylinder to new keys, $25-$45 per cylinder. These are honest ranges; the firm written quote you get on the phone is the one that holds. What drives cost here is parts and time. OEM Medeco pins and sidebars cost more than generic ones, and working on a 90-year-old mortise case takes longer than a modern bored prep. That’s fine. We’d rather spend an extra twenty minutes on the bench than send you home with a lock that binds again in March. Call (331) 310-8471 and the dispatcher will walk through your exact Medeco model and door setup, then quote a price before anyone gets in a truck. The estimate is free, and if you’ve got a written quote from another shop, we’ll review it at no charge.
Serving Detroit, MI - Our Local Coverage Area

We’re based in the Detroit area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Medeco Locksmith in Detroit
Yes, in most cases. An M3 cylinder can be rekeyed to new Medeco keys without touching the Corbin mortise case it sits in, as long as the cylinder body and sidebar are in serviceable condition. We pull the cylinder, inspect it, rekey it with factory Medeco pins, and reinstall it with the original case intact. If the case itself is damaged or misaligned, we’ll tell you before touching anything. Call (331) 310-8471 for a firm quote on your specific hardware.
In nearly every case, it’s freeze-thaw frame heave moving the door frame a few millimeters, which throws the Medeco tailpiece out of alignment with the deadbolt throw. The cylinder itself is usually fine. We fix it by replacing the tailpiece if worn, shimming the strike plate, and verifying the mortise pocket hasn’t shifted. That repair runs $120-$180 depending on what we find. Call (331) 310-8471 and describe the door; we’ll give you a written range before anyone comes out.
Full cylinder replacement, because there’s no bitting record to cut a key from and the original owner’s key control card didn’t transfer with the deed. We remove the existing Medeco cylinder, install a new one matched to fresh factory-cut keys, and hand you the bitting record so you control future key duplication. Replacement runs $180-$280 for a standard Medeco M3 or Biaxial cylinder. Call (331) 310-8471 and we’ll quote your model over the phone.
Yes. KeyMark is a common sight on Detroit commercial storefronts, medical offices, and apartment building entrances. We service, rekey, and retrofit KeyMark cylinders as an independent provider. KeyMark keyways are restricted, so we verify ownership or property management authorization before producing keys. If you’ve got a quote from another shop, bring it in writing and we’ll review it at no charge. Call (331) 310-8471 to describe the installation.
Yes, with a caveat. We install smart deadbolts that accept Medeco-compatible high-security cylinders, so you keep the restricted keyway while adding keypad or app access. The existing Biaxial cylinder can be rekeyed into the new deadbolt body in many cases. Not every smart deadbolt accepts a Medeco core, so we’ll confirm compatibility before quoting anything. Budget $220-$380 plus hardware, depending on the smart model you choose. Call (331) 310-8471 and we’ll walk through what works with your existing cylinder.
Service Areas Near Detroit

We serve Detroit proper plus the surrounding metros where Novak Lock & Security runs regular routes: New York City, Chicago, and Brooklyn. If you’re comparing Medeco service options between regions, see Medeco service in Boston and Medeco service in Memphis for the same documented approach in those markets. Our full coverage is on the Detroit service area page.
Book Your Medeco Service in Detroit Today
Need Medeco work done in Detroit? Call (331) 310-8471 now for an Emergency Locksmith in Detroit. A live person answers, 24/7. We’ll quote a firm written price before anyone is dispatched, and the tech who shows up is background-checked, uniformed, and carries OEM Medeco parts. Same-day service is available for most cylinder repairs and rekeys.
Written by Daniel Novak, Owner at Novak Lock & Security, serving Detroit with independent Medeco service.






