Can not find a 76mm / 44mm deadlock?

[bilabonic]

Hi

Just removed a deadlock from a fire door and it’s an unusual size?

The case/depth is 76mm/3” but the backset is 44mm.

The only locks I am finding with 44mm backset are 64mm/2 1//2” ?

Anyone advise please.

Thanks

 

[blup]

Don’t think you’ll find one, so will probably have to fill snd redrill.

 

[JohnD]

I might have one

Please post some photos, and mark the dimensions.

Is it for a front door?

Does it need to be a BS lock?

Would a sashlock be acceptable?

 

[bilabonic]

Don’t think you’ll find one, so will probably have to fill snd redrill.

It’s a thick solid door. 44.mm min
What would recommend to fill a big area?

 

[bilabonic]

I might have one

Please post some photos, and mark the dimensions.

Is it for a front door?

Does it need to be a BS lock?

Would a sashlock be acceptable?

It’s an inside deadlock
measurements are 76mm X 44mm as above. No

 

[blup]

It’s a thick solid door. 44.mm min
What would recommend to fill a big area?

I assumed from your description that the existing drilled holes would line up with the 44mm backseat, leaving a half gap at tne back, and maybe extra height of the new lock to be chiselled out

 

[JohnD]

It’s an inside deadlock
measurements are 76mm X 44mm as above. No

So the height of the case is three inches, as well as the depth?

The centre of the keyhole spindle is 44mm from the fore-end. How far from the top and bottom?

Are you concerned about the size of the fore-end, or will you chisel it to fit?

In your photo the bolt looks unusually large. Is that significant?

 

[bilabonic]

It is an odd size.

3” high and keyhole is set back 44mm.

I tried Screwfix. Toolstation and both local building merchants amd no joy.

I have put on a standard night latch it for now but find it odd that there is no replacement for this size?

My local BM stated it was discontinued and that I need to use a 3” case and a euro cylinder even though it an internal door??

Cheers.

 

[crank39]

Would this work, one of my first results

 

[JohnD]

There is a 44mm backset, which you want.

The height of the case is 90mm, which is more than 3 inches, so you would have some chiselling to enlarge the mortice. The Chubb 3G114 is 76mm high and 67mm deep, which would fit, but the backset is only 40mm, which is a little less than you want.

I can't see the thickness of the case mentioned. It nay be about 18mm. Old internal locks are usually less.

Is it for a fire door? How thick is the door?