Thumbturn fixed with adhesive, cylinder replacement due to loss of key

"Cylinder replacement due to loss of key"

The request itself was simple, but when I started working on it, it turned out to be quite a big task. The LSP's thumbturn is completely glued and will not come off at all.Even if you use a pipe wrench, it will not budge.What kind of adhesive did you use?

After all, I decided to expose the pull-leg screw by adding a hole from the thumbturn side.Since it is stainless steel, I broke 3 drill bits.The door was very difficult to secure, so the force was not concentrated on one point.The processing depth is also nerve-wracking, and such processing is rare.

We didn't have thumbturn in stock at this point, so let's prepare some in the future.