Eurolock dummy barrel and locking tool

This design was created to allow an office internal door to be permanently locked, with a neat and simple blank printed in a similar colour to the existing door furniture.

No changes were made to the door - the original Eurolock cylinder was removed (screw on the lock plate), the door closed, and the key-like locking tool inserted and rotated to lock the mortice in exactly the same way the pawl on a eurolock does.

The blank was then inserted and held in place with a little silicone, but if the door is to be kept open (e.g. remove the ability to lock it), the original screw can be used.

The result isn't high-security, (the blank can be pushed out, and the mortice unlocked with bent wire and some skill - the locking tool just makes it easy), but the changes are fully reversible.

The openSCAD design has parameters to allow the size of eurolock to be adjusted (both front and back sets). For best results, make the blank smaller than the previous lock so it is flush with the door.

Print the locking tool with supports.

My MK4 printed all parts in silver silk PLA vertically after splitting the STL into two components and only enabling supports on the locking tool.