Repair of a broken key at the entrance door of a certain factory

"A request to remove a broken key"

It is possible to enter the room, but it seems that the key was broken when opening the door.

I checked and it was a H248 disc tumbler cylinder.

The tip is broken from the 2nd pin.In order to make it vertical position, I operated pin 1 and removed the key.

The cylinder needed to be disassembled and cleaned due to aged deterioration, so we will proceed to remove it.

However, the front is integrated with the door frame, so remove it.

It was the BH type, but it was the old U-shaped pin type, not the set screw type.Remove the cylinder using the spare key.

I carefully disassembled and cleaned it and the operation was restored.Although it is a cylinder with low crime prevention, it is said that it will still be used in active service due to budget concerns.