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Get your free estimateMedeco Locksmith in Pomona, CA | Greystone Locksmith
We provide independent Medeco locksmith service across Pomona, handling everything from Maxum deadbolts to M3 restricted keyway cylinders. What makes our Medeco work different here is simple: Pomona’s housing stock forces you to understand how a high-security cylinder behaves when it’s sitting in a 1940s mortise lock on a door that swells every summer. If you need Medeco service, rekeying, or repair, call (866) 497-9415. Greystone Locksmith covers ZIPs 91767, 91768, 91769, and 91797.
Why Pomona Residents Choose Us for Medeco Service
Medeco locks are not something you learn on the fly. The Biaxial sidebar, the M3’s restricted keyway, the Maxum’s hardened inserts: these are systems with tight tolerances. Our techs work on them regularly, so we don’t stand in front of your door figuring it out the first time. We carry OEM Medeco cylinders, pins, and key blanks for the model lines you actually find in Pomona homes and commercial properties.
Gil Tanner, who owns Greystone Locksmith, grew up in Riverside and has spent close to three decades working locks across the Inland Empire. He came up through the vocational program at Riverside City College, where an instructor told him a locksmith is basically a problem-solver with better tools. That’s still how we approach every Medeco job. Send us to a locked-out tenant or a jammed Maxum, and we’ll diagnose before we touch anything. As Gil puts it, a lock is only as good as the installation behind it.
Different locksmiths in Pomona carry different inventory. We stock Medeco parts because we know the brand, and because high-security hardware shows up often in this city. For more on what we do with the brand, see our Medeco sales & service page.
Styles & brands we work with







Common Medeco Locksmith Problems We Solve in Pomona
These are the Medeco failures we see most often across Pomona. Each one connects to how the city’s homes and climate actually behave.
- Keyway wear and binding on Medeco Maxum deadbolts. Older Pomona bungalows from the 1940s and 1950s sit on doors that swell in summer. The cylinder is mounted in a door that has shifted slightly, the bolt no longer throws cleanly, and the key starts to bind. Keep forcing it and you get a broken key in the cylinder. We see this all the time near downtown and off Holt Avenue.
- Stripped or wallowed screw holes in original mortise locksets. When a Medeco high-security cylinder was retrofitted into a pre-war mortise body, the mounting screws often went into soft, aging wood. After a few Santa Ana wind events rack the door, those screw holes strip out and the cylinder starts to turn in place. We repair and reinforce rather than patch.
- Gummy or frozen pin stacks in Biaxial and M3 cylinders. Pomona’s dry heat and fine dust work into the cylinder over time. The pins get sluggish, the sidebar drags, and the key feels rough or refuses to turn fully. This is not a lubed-and-done fix: the cylinder needs to be disassembled, cleaned, and repinned properly.
- Lost-key no-card situations on restricted keyways. Medeco keys can only be duplicated by someone who controls the keyway and has the right blanks. When the only key is gone and the original card is long lost, a hardware store can’t help. We can originate new keys from the cylinder itself, but it requires the correct pinning kit and someone who knows the system.
- Master key systems out of sync near the Fairplex. Rental properties and commercial buildings along the I-10/Holt corridors often run Medeco master key systems. When a tenant turns over and a key goes missing, the property manager needs selective rekeying that preserves the master hierarchy. That’s standard work for us.
Medeco Service in Pomona: What Local Conditions Mean for Your Equipment
Pomona’s pre-war downtown and bungalow neighborhoods often still have original mortise locks with Medeco high-security cylinders retrofitted decades ago. That’s the specific thing about this city: we routinely rekey and match period keyways rather than swap hardware. A newer inland suburb with uniform builder-grade deadbolts never sees this call. But in Pomona, the original mortise body might be from the 1930s or 1940s, and the cylinder is a modern Medeco Biaxial or M3. The homeowner wants to keep the period hardware look. So the job becomes a retrofit: rekey the Medeco cylinder, preserve the mortise body, reinforce the strike, and cut new restricted keys. When the mortise body itself is too far gone, we’ll tell you honestly and recommend a modern Medeco Maxum deadbolt instead. That’s a call that just doesn’t come up in newer cities.
Medeco Models & Products We Service in Pomona
We service the Medeco model families that appear most often across Pomona: the Maxum deadbolt, the M3 cylinder with its restricted keyway, the Biaxial, and the classic Medeco Original mortise cylinder. Most of what we carry is OEM Medeco, because the sidebar geometry and pin tolerances demand genuine parts. For older Medeco Original locks where OEM springs or cam parts are discontinued, we’ll source quality aftermarket components and tell you exactly what we’re doing and why. Pomona’s housing mix means we stock parts for both modern high-security installs and retrofit mortise work. That keeps turnaround fast when you need a rekey or a cylinder swap.
Medeco Service Pricing in Pomona
Medeco service pricing in Pomona varies with the job. A straightforward Medeco cylinder rekey typically runs $45 to $130 per cylinder, depending on whether we’re rekeying to a new key or re-establishing a key system from a no-card lost-key situation. Rekeying a full home with Medeco hardware usually falls between $100 and $300. Cylinder replacement with an OEM Medeco Maxum or M3 unit runs $90 to $200 per cylinder, parts included, and a full Medeco Maxum deadbolt installed typically lands between $160 and $350. Door reinforcement around the strike plate or hinge area is generally $40 to $120, and Medeco key copies run $12 to $35 each. The free estimate covers a site inspection of the lock, the door fit, and the cylinder condition. We quote the full price on the phone before anyone is dispatched, and it’s the price on the invoice. Call (866) 497-9415 for an exact quote on your Pomona property.
Serving Pomona, CA — Our Local Coverage Area
We’re based in the Pomona 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 Pomona
Yes. The key card makes duplication easier, but it is not a hard requirement. We can disassemble the cylinder, decode the existing pins, and originate a new key set from the lock itself. We stock the restricted blanks and pinning kits for the Medeco models common in Pomona, so this is a standard same-day job in most cases. Call (866) 497-9415 and we’ll tell you exactly what your cylinder needs.
Usually both, and the door comes first. Pomona’s dry heat and wind patterns cause wood doors and jambs to move. The deadbolt was installed when the door sat one way, and now it’s sitting slightly differently. The cylinder binds against the tailpiece, and the key sticks. We fix the door alignment and reinforce the strike, then address any cylinder wear. That’s the repair that actually lasts.
Yes. We keep OEM Medeco Maxum and M3 cylinders in stock for the model lines most common across Pomona, including retrofit mortise applications. If the cylinder you need is an uncommon finish or configuration, we can usually source it within a day through our Medeco sales & service network. Call for availability and an exact quote.
It can be, but the answer depends on the condition of the mortise body and the door itself. A Medeco cylinder does not fix a worn mortise lock that’s decades old. If the body is solid and the door is sound, a Medeco high-security cylinder is a meaningful upgrade. If the mortise body is tired, we’ll tell you and suggest a modern Medeco Maxum deadbolt instead. Either way, we give you an honest recommendation, not a sales pitch.
Yes. We design, rekey, and maintain Medeco master key systems for rental and commercial properties across Pomona, including the Fairplex and Holt corridor area. Tenant turnover rekeys, lost-key replacements, and selective rekeying that preserves the master hierarchy are all regular work for us. Call (866) 497-9415 and we’ll walk you through the options for your property.
Service Areas Near Pomona
We serve Pomona and the surrounding Inland Empire communities, including Riverside, Rubidoux, Sunnyslope, Pedley, and Woodcrest. For Medeco work in nearby areas, see our Medeco service in Lakeland Village and Medeco service in Sedco Hills pages. If you’re in the broader Pomona service area, we can reach you quickly.
Book Your Medeco Service in Pomona Today
A Medeco lock is too precise to leave to a generalist. Whether you need a same-day rekey near downtown Pomona or a cylinder swap on a bungalow off Holt, we’re ready. Call Greystone Locksmith at (866) 497-9415 for a free estimate, and we’ll quote the full price before we dispatch.
Written by Gil Tanner, Owner at Greystone Locksmith, serving Pomona and the Inland Empire for nearly three decades.