ABS Euro Cylinder wont to turn once installed into uPVC door

[AnthonyDIY]

Hi, I have purchased a new ABS Euro Cylinder lock for my front door, after installation it will not turn inside the door.

Comparing my old lock to this new one, the only difference that I can see is the old lock has the black locking tab feathered at the inside end closest to the mechanism.

I have taken a picture of the locks together to highlight what I mean:



I really do not know what the best thing to do is next, looking at other pictures of locks they are all the same solid block design.

Short of filling to match the profile is there anything I may be missing?

The measurements at the same new and old, the install was done as per the many descriptions on the web and it was secured with its new screw.

 

[Alarm]

The cam in the middle is wrong.

Get one the same.

 

[AnthonyDIY]

Hi Alarm, thanks for your reply, can you advise as to the specific difference please? When holding the two units together they are the same length and dimensions, the cam of course is different, however if these are universal should it not be one and the same?

I was looking over alternative locks earlier today and each picture I cam across looked much the same as the ABS lock, in that the cam when turning was a solid square block.

Do I need to source some sort of tapered cam based lock? Are these easily sourced?

Thanks very much.