As for jaw screws, I've never had one loosen and never had one break. Since I primarily turn dry wood, I wonder if the resins and extractives in slopping wet wood might glue improperly tightened screws to the slides. More likely, is using more force than needed.
One thing people who work often with wet, sticky wood might try is lubricating the threads before installing. It's a common misconception that lubrication can lead to screws loosening. Laboratory tests have proven this not the case. There is much info about this from reliable sources. A google search gave me a bunch, this is one:
Learn why it's important to lubricate bolts, threaded fasteners, and more in our insightful article. Discover the role of lubrication in ensuring equipment reliability.
reliabilitysolutions.net
I lubricate most screw threads, including lug nuts on vehicles and heavy trailers and do the final tightening with a torque wrench. Replace the lug nuts and/or studs if they have been abused and damaged. I had to do that on a horse trailer I bought - the nuts were in horrible shape.
Torquing to spec after lubrication would be ideal until one develops and good feel for tightening. One way to develop the feel is torque, loosen and manually retighten, then recheck the torque.
All my chucks are Novas and I always follow their printed instructions with installing jaws. That may help. Having developed a calibrated wrist for torquing might help. Have enough chucks so jaws rarely need changing, probably helps the most. For example, for several good reasons I keep 4-5 SN2 chucks with the std 50mm jaws that haven't been removed in years.
JKJ
