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-   -   Replacing mortise door lock without drilling (http://www.diychatroom.com/f2/replacing-mortise-door-lock-without-drilling-140632/)

grex23 04-18-2012 04:48 AM

Replacing mortise door lock without drilling
 
I have an old mortise doorlock which has a doorknob and deadbolt slightly above it. I measured the size of the piece inside the door but the only mortise doorknobs I saw would require new holes to be drilled for the knob and/or the deadbolt.

How could I find a drop in replacement or find a way to replace this doorknob without any drilling of the door itself.

Thank you for your time.

oh'mike 04-18-2012 05:22 AM

Post a picture if you can---

The obvious answer is to get an exact replacement or repair the old lock set---
An old time locksmith can rebuild a mortised lock set---an architectural salvage yard ( or E-bay) might also have an antique replacement.

Why is drilling out of the question?

grex23 04-18-2012 01:48 PM

Quote:

Originally Posted by oh'mike (Post 901529)
Post a picture if you can---

The obvious answer is to get an exact replacement or repair the old lock set---
An old time locksmith can rebuild a mortised lock set---an architectural salvage yard ( or E-bay) might also have an antique replacement.

Why is drilling out of the question?

I will post a picture. Drilling is out of the question because it is just too much work and I don't have a drill.

With the lock I am not sure how to remove the lock cylinder piece as well and I know different locks have different ways to uninstall.

oh'mike 04-19-2012 05:05 AM

Google images should help---Any good lock smith can help---I suggest repairring the old one.

grex23 04-19-2012 05:57 AM

Quote:

Originally Posted by oh'mike (Post 902212)
Google images should help---Any good lock smith can help---I suggest repairring the old one.

The one I have now has a tiny turnknob for the deadbolt portion and the lock isnt as high away from the doornobs as others so I was having a hard time finding the appropriate parts.

oh'mike 04-19-2012 06:14 AM

Your picture will help--there are a few antique house restorers on this site--along with home owners who have these old style locksets still in use.

Somewhere in the basement I have a box full of old mortised lock sets---I find the old things fasinating and can't throw them away---

Maintenance 6 04-19-2012 12:39 PM

Quote:

Originally Posted by grex23 (Post 901816)
I will post a picture. Drilling is out of the question because it is just too much work and I don't have a drill.

With the lock I am not sure how to remove the lock cylinder piece as well and I know different locks have different ways to uninstall.

At the edge of the door and directly in line with the mortise cylinder will be a screw (there could be a pair of screws). Loosen the screw several turns and the cylinder will thread out of the lock. If it's a pair, loosen the one closest to the cylinder. If no screws are visible, then it may have a "scalp". Remove the two small screws that hold the scalp. Behind that you'll find the cylinder retainer screw(s). There are many, many configurations of mortise sets. Finding a direct replacement could prove to be a challenge as all of the old cast iron cased residential ones are long obsolete. If the problem with your old lock is a broken spring or two, then a good locksmith can make a new one. Knobs, escutcheons and spindles on these can all be bought new and replaced.


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