ERA thumbturn from door cylinder fitted on my front door is the wrong size?

[Yukster]

I had a new door made and ERA locks fitted but the thumbturn cylinder lock looks the wrong size. I don't know the dimensions of the lock but the door is 55mm thick.

There's an 8mm gap as seen in the below pic. Is this normal? I'd like there to be no gap. What cylinder dimensions are the right ones for my door?

TIA

 

[JohnD]

Show us the outside please

 

[Yukster]

Show us the outside please

Outside photos as requested

 

[mikehammer69]

I just checked mine I've about 10 mm on them and am happy with that

 

[JohnD]

OK, so the outside escutchron is held on by screws from the inside, I think. If it is sufficiently strong and armoured, it will give some protection against attacks seeking to snap the cylinder from outside. The nozzle of the cylinder has to be completely surrounded so it can't be grabbed. It's OK if it is fractionally recessed into the escutcheron.

You can get escutcheons in various thicknesses. Examine yours. If it is not strong enough, I'd look at fitting a new one, and measuring the combined thickness before buying a new cylinder to suit. I prefer the longer outdoor steel shields that have extra pegs or screws making them harder to break. I used to use "lock guard" but I don't know if they still sold.