I recently rough-turned a good quantity of wet cherry. Midway through the work, when changing my chuck jaws to a larger set, I found that the screws that secure the jaws were very difficult to loosen. Moisture from the wood contributes to the screws locking in place. Another cause is the tendency to over-tighten the screws. 
Now, every time I switch chuck jaws, I apply an anti-seize lubricant to the screws to make it easier to back them out the next time. The jaw screws came with anti-seize compound on them from the manufacturer, but the lubricant needs to be replenished over time. 
The lubricant is commonly available at automotive supply stores. Chucks are not the only turning equipment that need anti-seize lubricant. The screws that secure carbide cutter inserts to a tool shaft can also be difficult to loosen. 
Leon Olson, Minnesota 
This article by Leon Olson, Minnesota
Published March 2017 in the Tennessee Association of Woodturners newsletter.
Reprinted here with permission of TAW.

 

 

 

 

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