Change or rekey · Dorchester
Vintage Mortise Lock Service in Dorchester
The brass knob on the front door of your century home turns, but nothing happens on the other side. The latch stays tucked in, the door swings free, and the only thing holding it shut is the deadbolt and a bit key that has worn down to a nub.
Vintage Mortise Lock Service
In plain words
Servicing the original lock is usually the better choice for an older home, for practical reasons as much as sentimental ones. Cutting a period door for a modern cylindrical lockset means boring a large hole through the stile and leaves the old mortise to be filled; a repaired mortise case avoids all of that. Where the home is a designated heritage property, keeping the hardware may also be what the municipality expects. The service treats the door as something to preserve: minimal disturbance, parts matched to the original, a strike adjusted rather than replaced, and the old lock left running smoothly for decades to come.
How the visit goesThe key turns freely in the round cylinder on the door, all the way around and back, without the bolt shifting at all. The cylinder itself wobbles slightly when you press it, as if it has come loose inside the door.
Dorchester
How the visit goes
Condition of the wood around the pocket
The mortise pocket and the screw holes in the door edge carry the whole lock, so their state is part of the assessment. The locksmith probes the faceplate screws for grip, looks for cracks running from the pocket into the stile, and checks whether an earlier repair enlarged the pocket or packed it with something soft. Stripped holes, a split edge or a case that shifts when the knob is turned change the plan: dowelling and re-drilling, a hardwood filler, or longer screws may be needed before the rebuilt case can be trusted. Finding this now avoids surprises once the lock is back in the door.
Putting the door edge right
Before the case goes back, the pocket and screw holes get whatever attention the check turned up. Stripped holes are drilled out, plugged with glued hardwood dowel and re-drilled so the faceplate screws bite. A pocket that has loosened is packed with a thin hardwood shim glued to one wall so the case sits tight. A split at the edge is glued and clamped. None of this changes the door's appearance; it simply gives the rebuilt lock something solid to sit in, which matters because a case that shifts in its pocket will bind the spindle and undo the bench work in a few months.
Looking after the finish
The brass or bronze knobs and escutcheons on an old door have earned their patina, left alone unless you ask otherwise. Paint cleaned from a faceplate or strike leaves the bare metal as found, not polished bright. If you would rather see them shine, check the finish first: unlacquered brass takes a gentle polish well, kept off the keyhole and spindle; polishing a lacquered piece can scratch through it and start tarnish underneath. Lacquered reproduction parts resist tarnishing rather than darken to match; an unlacquered reproduction is built to age and blend in over a season or two. A light wipe when dusting is all the upkeep the trim needs; wet cleaners find their way into the case.
Vintage Mortise Lock Service
In the van
- Warding files
- Dry graphite or PTFE lubricant
- Cylinder set screw
- Bit key blanks
- Light lock oil
What affects the quote
Same fees day, night or weekend
1Paint and seized parts
Hardware buried under decades of paint takes time to free and clean without damage. A faceplate, strike and thumb-turn that have to be stripped back add to the visit and are noted in the quote.
2Replacement case
A case that is cracked or worn through is replaced with a reproduction or modern mortise case sized to the pocket. The case itself, any trimming of the pocket and the refitting are itemised separately from a repair.
3Extras you choose on the day
A high-security cylinder, a lockbox for a spare bit key or a separate modern deadbolt above the original are optional additions. None is required to make the old lock work, and each is priced as its own line.
Vintage Mortise Lock Service: questions
Is it worth repairing an old mortise lock instead of replacing it?
Usually, yes. The mechanisms are simple and robust, and what fails is nearly always a spring, dried grease or wear on one part, all of which are repairable on a bench. Replacing the lock with a modern cylindrical set means boring a large hole through the door stile and filling the old pocket, which is more work and changes the door for good. A rebuilt case keeps the original trim and keeps the door intact.
Why does the deadbolt scrape or need a shove to throw?
Two causes cover most cases. Either paint has built up on the faceplate, the bolt or the strike so the bolt drags across it, or the door has dropped so the bolt is entering the strike pocket at an angle and rubbing its edge. Occasionally a bent deadbolt lever inside the case adds friction. Cleaning the paint back, adjusting the strike and checking the lever all happen as part of the service.
My home is a designated heritage property. Does that change anything?
It reinforces the choice to service rather than replace. Where a property carries a heritage designation, changes affecting listed features can need extra sign-off, and original door hardware is occasionally among those features. A rebuilt mortise case with its original trim is preservation rather than alteration, and the locksmith's written record of what was retained and what was replaced is useful for your file.
Change or Rekey Locks
- Deadbolt InstallationThe door from the garage into the kitchen closes on a passage knob with no lock at all.
- Lock Replacement & UpgradeThe lever on the side door droops toward the floor and rattles in your hand.
- Smart Lock InstallationThe rental turns over every few months and each time you drive across town to swap keys, then…
Vintage Mortise Lock Service near you
Residents and business owners in Dorchester can use this list to find the service that fits, then read what it involves before anyone comes out. Emergency openings are here. So are rekeys, lock changes, deadbolt and high-security upgrades, commercial door hardware, master keys, safes and key cutting.