r/Locksmith • u/Cachibloodless • 1d ago

I am NOT a locksmith. Little help.

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Hello Fellas, New here.

I want to change the cilinder of my apartment door

I have find out that I need to get a mortise cilinder.

Is there a way to know what size I should get just by looking at these pictures.

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9

u/bjdlock 1d ago

1-1/8”. Yale cam. This is a marks 91a

3

u/Cachibloodless 1d ago

Thanks...!!

3

u/jaxnmarko Actual Locksmith 1d ago

No. You need to remove the CYLINDER in order to measure it and see what type of tailpiece/cam it requires.

3

u/Cachibloodless 1d ago

Will do. Thanks.

2

u/FilecoinLurker 1d ago

If you can't get the old mortice cylinder out to measure it yourself how do you think you'll be accomplishing the next step of putting it in?

2

u/Cachibloodless 1d ago

Got it. Thanks.

3

u/eridanus01 Actual Locksmith 1d ago

It's 1-1/8" on for a Marks 91/A 114A, etc. 7NY, 9NY... it depends on door Thickness, but in your Instance I can almost guarantee it's 1-1/8".

2

u/Cachibloodless 20h ago

Thank you.