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Three rectangular door-handle sets with keyholes in black, silver-colored and gold-colored finishes standing on a countertop. — Commercial Rekeying, Toronto
Hands holding a silver-colored lock cylinder and a brass-colored key above a workbench with padlocks, keys and tools. — Master Key System Design, Toronto

Commercial · Toronto

Commercial Rekeying

Two people left over the summer and the keys they handed back came up one short.

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In plain words

Changing the locks answers today's question; key control keeps it answered. During a commercial rekey the new keys are stamped with a serial code rather than the business name or address, so a dropped key tells its finder nothing. Each key is logged against the person who receives it, and the old keys are collected and cut up on the spot. For premises that want copies kept out of hardware stores, the cylinders can be set up on a restricted keyway, with blanks released only against a signed authorization. What you end up with is a set of locks whose keys you can account for years later.

Sound familiar?

The manager's key ring went missing somewhere between the bank and the car, and the master on it opened every door in the building. Until the cylinders are changed, whoever finds it is holding the run of the place.

How the visit goes

Commercial Rekeying

How the visit goes

Handheld diagnostic unit with a screen and buttons lying on a dirty car floor mat, cabled to a port under the dash.
Wooden door with a dark lever handle and empty round bore, beside a deadbolt, latch, screws and screwdriver on a case.
  1. Cores and restricted keys already on site

    Some businesses already have more key control than they realize. Figure-eight shaped cores in the levers point to an interchangeable core system, which means a control key somewhere removes the core without unscrewing anything; finding out who holds that control key, or whether it left with a former manager, shapes the whole job. Keys with an unusual profile or a stamped number may belong to a restricted keyway whose blanks are only supplied against a signed letter of authorization, and the locksmith asks who the signatories are. Knowing what is already in place lets the new plan build on it rather than replace it, and flags any control that has quietly lapsed.

  2. Storefront and mortise cylinders

    Aluminum storefront doors carry a threaded mortise cylinder held by a small set screw in the door edge. The locksmith loosens the screw, spins the cylinder out, repins it, and threads it back to the same depth so the cam engages the deadbolt or hook bolt behind it and nothing else. Mortise locks in older office doors work on the same principle with a heavier lock body. On both, the depth and cam type matter as much as the pinning: a cylinder a turn too far in or a cam of the wrong shape will feel right in the hand but fail to throw the bolt, so each is cycled open and closed.

  3. Exits that still open the way they must

    Rekeying changes who can come in; it never changes how people get out. Every exit door and every door on the way to one is left opening from the inside with a single motion and no key. On a door with a panic bar, the outside cylinder simply controls entry, and the bar keeps working exactly as before. Once the locksmith has finished, walk the exit routes yourself, push each bar and turn each thumb-turn, and make that walk a habit at the start of every season so a new deadbolt or a helpful padlock never creeps onto an exit.

Commercial Rekeying

In the van

  • Master pins

  • Cylinder removal and spanner tools

  • Mortise cylinder set screws and cams

  • Key stamp set and tags

  • Code key machine

Technician holding a three-button key fob at a workbench with a tablet, two spare fobs, a notebook and a pegboard behind.

Commercial Rekeying

What affects the quote

  1. Distance to the premises

    Travel to the site is part of the call-out, and a unit in a downtown plaza and one at the end of a rural industrial road are different trips.

  2. Upgrades chosen on the day

    Some businesses use the visit to move to interchangeable cores, add a lockbox for the alarm company or fit a heavier cylinder on the cash room. Each is a separate line you can accept or leave.

  3. Mix of lock types

    A key-in-lever cylinder, a storefront mortise cylinder, a back-door rim cylinder and a padlock take different handling, though several full-size formats can share one pin kit for the same key system; a premises with a wide mix of cylinder types and brands still takes longer than one with one.

What to have ready

  • Are any cylinders stiff, loose or hard to turn at the moment?
  • How many doors, padlocks and cabinets do you want included, and where are they?
  • How many keys do you need cut, and for whom?
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Commercial Rekeying: questions

Questions
Does stamping keys 'do not duplicate' stop people copying them?

Not reliably. The stamp is a request, and any key on a standard blank can be copied by anyone with the blank and a machine. What does work is controlling the blank itself through a restricted keyway, or controlling access to the lock through interchangeable cores and a tight register. Stamping still has a place: a serial code on each key, instead of the business name, lets you track it without telling a finder where it fits.

Can all our doors be put on a single key?

Yes, if the cylinders share a keyway or can be fitted with ones that do. Keying everything alike is popular with small shops because staff carry one key and spares are simple. The trade-off is that one key then opens the cash room as readily as the front door. Many businesses choose a middle path: the doors everyone uses on one key, the sensitive rooms on another, and an owner's master that opens both.

What is the difference between rekeying a business and replacing its locks?

Rekeying keeps every lock on the door and changes only the pins inside the cylinder, so a new key works and the old ones stop. Replacing swaps the hardware itself. Commercial cylinders are made to be repinned many times, so rekeying suits any lock in sound condition and leaves the levers, trim and door untouched. Replacement is chosen door by door for cylinders that are worn, corroded or too light for what they protect.

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