OKC HB52 + DAC2 Set exchange from knob to U9.HMD-1LS

"malfunction repair replacement"

Knob lock with OKC HB52 and DAC2.
The knob on the interior side comes off, and the key does not enter the keyhole.Recently, there have been many defects and breakdowns, and I would like to replace it.

First of all, I decided to check whether the spindle would fit.When I opened the knob and the main lock case, I found that part of the main body's sheet metal was floating.After explaining the symptoms, he agreed that the main unit could be replaced, and when the lid was opened, the stud welded part was partially damaged and the stud was completely floating.
After all, it was an expensive full set exchange.

Replacing U9.HMD-1LS with OKC HB52 is fully compatible. OKC is a sash manufacturer and seems to have already been discontinued.