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Car keys & fobsNon-destructive entry first, always - and we re-key Schlage, Kwikset, and Baldwin locks on the spot while you watch
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Get your free estimateMedeco Locksmith in Chinatown, CA | Cypress Lock & Key
We provide independent Medeco locksmith service throughout Chinatown (94133), from Stockton Street SROs to the family associations on Grant Avenue. The one thing that makes our Medeco work different here: we’re not a manufacturer-authorized shop pushing factory-new hardware, we’re the crew that re-pins, lubricates, and adapts genuine Medeco cylinders so they keep working in Chinatown’s salt-fog-damp, 1906-and-later buildings. If you have a Medeco cylinder that’s stiff, seized, or needs a rekey, call (877) 265-4385 and we’ll give you a straight read on the problem before we touch a tool.
Why Chinatown Residents Choose Us for Medeco Service
Most locksmiths in San Francisco can cut a Kwikset key. Fewer know what to do when a Medeco Biaxial cylinder in a 90-year-old mortise lock starts binding because the rotating pins have been breathing Pacific fog for a decade. We do. Our crew works on Medeco in San Francisco constantly, because Chinatown’s historic buildings are full of high-security cylinders that demand precise pinning, restricted keyway control, and careful servicing rather than brute force. Noel Carver, our owner and lead locksmith, completed a locksmithing and security systems program at Fresno City College and has been running calls in this part of the state for going on two decades. The thing his customers mention most is that he shows up calm, no drama, no upsell pressure, just a clear read of the problem and a clean fix. Know your hardware, know your options. That’s the whole job.
Styles & brands we work with







Common Medeco Locksmith Problems We Solve in Chinatown
Medeco hardware is built to resist picking and unauthorized duplication, but it has failure modes that show up differently in Chinatown than they do in, say, a dry inland subdivision. What we see on a regular basis:
- Salt-fog corrosion seizing the rotating pins. Medeco’s hardened rotating pins are the heart of its pick resistance, but they’re small and precisely machined. When fog-driven moisture settles into an unheated SRO stairwell or a woodframe entry on Waverly Place, those pins and the cylinder plug start to corrode. A key that turns stiffly in July can fail to rotate at all after a damp winter.
- Worn restricted keys hanging up mid-rotation. Restricted keyway keys are hard to duplicate, which means people keep using the same key for years past its tolerance. A worn Medeco key in an older Biaxial cylinder can bind mid-turn instead of withdrawing cleanly, and the temptation is to force it. Don’t. We cut fresh keys and can recondition the cylinder if it’s still sound.
- Mortise retrofits with a misaligned tailpiece. A lot of Chinatown doors are original 1906-and-later woodframe with old mortise locksets. Somebody retrofitted a Medeco cylinder into the mortise body years ago, and the tailpiece or cam got tweaked. Result: the deadbolt throws but the latch won’t fully seat, or vice versa. We see this all the time on commercial entries and multi-generational family association buildings.
- Sheared mounting screws on Maxum deadbolts in storefront doors. The Medeco Maxum deadbolt is a serious piece of hardware, but the mounting screws can loosen or shear in woodframe storefront doors, especially on shops that have seen repeated forced entry attempts or have a roll-down gate banging against the door frame. If the deadbolt’s body is wobbly, the cylinder is doing work it wasn’t designed to do.
- Landlord and family-association access control problems. Tenant turnover, family disputes, association board changes. Somebody needs authority to control who holds a restricted key, and Chinatown’s mix of SROs, subtenancies, and clan associations makes that more tangled than a standard single-family home. We handle this carefully and on the books, every time.
Medeco Service in Chinatown: What Local Conditions Mean for Your Equipment
Chinatown’s building stock is not a collection of standard single-family homes. It’s one of the densest, oldest housing inventories in San Francisco, a warren of post-1906 brick and woodframe buildings, SRO residential hotels, and narrow storefronts with old mortise locksets, skeleton-keyed doors, and heavy steel roll-down security gates. That means a Medeco upgrade in Chinatown frequently means adapting a genuine Medeco cylinder to an existing mortise lock or a steel roll-down gate rather than installing a factory-new deadbolt into a pre-drilled modern door, unlike a typical Mission District Medeco service call. On Grant and Stockton, those decades-old roll-down gates are often padlocked with mismatched or seized hardware in salt-fog air, so commercial lockout and gate-repair calls cluster around the same blocks and require coordination with the shop tenant or family association that controls the building. It’s not a matter of swapping one cylinder for another on a spec-sheet door; it’s measuring a 1930s mortise body against a modern Medeco cylinder and knowing whether a cam adapter or a tailpiece adjustment gets it seated correctly, or whether the body itself is beyond saving and the right move is a purpose-fit replacement. That’s the work this neighborhood actually requires.
Medeco Models & Products We Service in Chinatown
We service the Medeco hardware you’re most likely to encounter in Chinatown: the Medeco Maxum deadbolt, the Medeco M3 cylinder in both Original and BiLevel configurations, the Maxum 11TR and Maxum residential deadbolt series, and older Biaxial cylinders still in service across the neighborhood. For restricted keyway work, we keep genuine Medeco cylinders, pins, keys, and tailpiece/cam kits on hand, so a re-pin or a key cut doesn’t mean waiting on a distributor. For non-security-critical trim and fasteners, we’ll use quality aftermarket hardware where it makes sense. If your Medeco cylinder is sound, we re-pin and lubricate it rather than push a replacement. If the body is corroded or compromised, we replace it with genuine parts and explain why. We also carry our full Medeco sales & service depth to every call, not just the emergency fixes.
Medeco Service Pricing in Chinatown
Medeco service in Chinatown typically runs $95-$180 for a service call that includes a cylinder re-pin or a seized-lock repair with on-hand parts. A full Medeco cylinder replacement with new restricted keys runs $220-$385, depending on the cylinder type and whether we’re working inside an existing mortise body or a roll-down gate. Corroded hardware that needs freeing, lubrication, and adjustment before it’ll turn at all falls in the $110-$200 range. The variables: whether we’re adapting a cylinder to a non-standard Chinatown door or working on modern prep; whether the existing restricted keyway is intact; and whether the cylinder body itself is worth saving. We’ll quote the full price on the phone before anyone is dispatched, and that’s the price on the invoice. No call-out surcharge added on arrival. Call (877) 265-4385 for an exact quote. Estimates are free.
Serving Chinatown, CA — Our Local Coverage Area
We’re based in the Chinatown 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 Chinatown
We can almost always service the Medeco Biaxial cylinder in place. The mortise body around it is usually fine; it’s the cylinder’s rotating pins, plug, or tailpiece that’s binding. We free, lubricate, and re-pin the existing cylinder, cut fresh restricted keys if needed, and adjust the tailpiece so the deadbolt and latch seat correctly. Replacing the entire lockset is the last resort, not the starting point. Call (877) 265-4385 and describe what the key does, and we’ll tell you what’s realistic.
Usually the lock, but sometimes both. The damp winter air on Stockton gets into unheated stairwells and storefront entryways, and Medeco’s rotating pins start to corrode. The key may also be worn past tolerance, which makes a stiff lock feel worse. We diagnose by feel and inspection, lubricate and free the cylinder if it’s sound, and cut a fresh key if yours is shot. Call (877) 265-4385 before it stops turning entirely.
Yes. Rekeying a Medeco deadbolt means replacing the pins and cutting new restricted keys, so the old keys stop working immediately. It’s the single smartest move after a tenant leaves or an employee is let go, and it’s less expensive than replacing the whole deadbolt. We do this regularly for Chinatown landlords, SRO managers, and family associations. Call (877) 265-4385 to schedule a rekey, and we’ll give you a flat price per lock before we come out.
Yes, we run commercial lockout calls in Chinatown, including after hours. Those roll-down gates on Jackson and Grant are decades old, and the padlocks and hasps seize in the salt-fog air. We cut or free the seized hardware, open the gate, and can fit a new padlock or a Medeco cylinder into the gate’s locking point, often with bilingual coordination with the property manager or family association that controls the building. Call (877) 265-4385 the moment you need it.
We do. A lot of our Medeco work in Chinatown runs through Cantonese-speaking property managers, clan associations, and shopkeepers on Grant and Stockton, and we coordinate access and permission with whoever controls the building. Not every job needs that, but when it does, it’s part of the work. Call (877) 265-4385 and let us know what’s going on, in English or Cantonese.
Service Areas Near Chinatown
We provide Medeco service across the Chinatown service area and into surrounding Bay Area communities. You’ll find us working on Medeco cylinders in Medeco service in Mill Valley, handling storefront and residential hardware in Medeco service in Martinez, and serving San Mateo, Larkspur, and Hillsborough for customers who want the same careful Medeco work.
Book Your Medeco Service in Chinatown Today
If your Medeco hardware is binding, seized, or due for a rekey in Chinatown, call (877) 265-4385. We’ll give you a real assessment over the phone, quote the full price before dispatch, and get to you as fast as the neighborhood allows. Same-day service is available for most calls.
Written by Noel Carver, Owner at Cypress Lock & Key, serving Chinatown and the wider Bay Area.