Fast Oshawa Locksmith Service Team
Local locksmith team
Sep 14, 2026 4 min read
If your Oshawa home was built before 1980 — whether it's a century-old workers' cottage near the old McLaughlin estate in Rosedale or a brick bungalow on one of the mid-century streets off Taunton Road — there's a good chance your front door hides a piece of hardware that modern hardware stores barely stock anymore: the mortise lock. These deep-set, rectangular lock bodies are tucked inside the door's edge rather than bolted through it, and they've kept Oshawa families secure for generations. But are they still the right choice today, or is it time to consider a cylinder-based system?
This guide breaks down the real differences between mortise locks and cylinder locks, explains what makes each one a better or worse fit for older construction, and helps you figure out what a trained locksmith should look at before you make any changes to your doors. No guesswork — just practical answers built around the kind of homes that actually exist in Durham Region.
Frequently asked questions
Can a mortise lock be rekeyed the same way as a regular deadbolt?+
Yes, but the process is different. A mortise lock cylinder is removed from the front of the door using a set screw or a cylinder retainer, then rekeyed on a pinning block — the same pin-tumbler principle applies, but the cylinder profile and tailpiece design vary by manufacturer and era. Corbin Russwin mortise lock cylinders, for example, use a specific keyway that requires the right blank and the right pinning kit. A locksmith experienced with older mortise hardware will have the correct tools and blanks on hand; a general hardware store may not. If your lock is a legacy brand and you've lost the original key, have a professional assess the cylinder before assuming a standard rekey will work — some worn cylinders need replacement rather than rekeying.
My front door has the original mortise lock from the 1930s. Is it still secure enough, or should I replace it?+
Age alone doesn't disqualify a mortise lock — the design is genuinely robust, and a well-maintained mid-century or pre-war mortise case can still provide solid security. The real questions are: Is the cylinder pick-resistant by modern standards? Is the strike box properly anchored with long screws into the door frame stud, not just the casing? And is the door itself in good condition with no warping or gap at the frame? If the answer to any of those is uncertain, a trained locksmith can do a security assessment and recommend targeted improvements — often just a cylinder upgrade and strike reinforcement — without replacing the entire original hardware. Call (289) 512-8567 and we can walk through what's actually needed for your specific door.
What's the difference between a mortise lock and a rim cylinder lock?+
A mortise lock is set inside the door's thickness — the entire case, latch, and bolt mechanism live within the door body. A rim cylinder lock, by contrast, has the cylinder mounted through the door face but the bolt case (called a rim latch or night latch) is surface-mounted on the inside face of the door rather than recessed into it. Rim locks were common in older Toronto and Durham Region homes as secondary security on doors that weren't thick enough for a full mortise, and they're still used on some commercial applications. Both use a cylinder that a locksmith can rekey or replace, but the security profile and installation requirements are quite different. If you're not sure which type you have, a quick look at the inside of your door will tell you — if you see a box-shaped metal case screwed to the interior door surface, it's a rim lock.
How is the price for mortise lock service determined?+
Several factors shape the final quote: the type and brand of lock (a vintage Corbin Russwin or Baldwin mortise lock set requires different parts than a modern cylindrical unit), whether parts need to be sourced specifically for your hardware, the time of day the job is requested, and the travel distance to your location. Emergency or after-hours calls may also be factored in differently than scheduled daytime appointments. We never quote a price range and then adjust it at the door — we confirm an exact up-front price before any work begins, so you know exactly what you're agreeing to. Call (289) 512-8567 to describe your door and hardware, and we'll give you a clear answer right away.
