My tablesaw's throat insert used to cause me a lot of grief.

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My tablesaw's throat insert used to cause me a lot of grief. Vibration loosened the setscrews over time, and the insert dropped down below the tabletop. When I tried to rip a board, the bottom edge of the forward end would catch, resulting in an end grain tear-out.

To keep the setscrews firmly in place, I put a dab of Loctite 242 on the threads. The thread-locker prevents the setscrews from moving, but a hearty twist with an allen wrench breaks the bond.
—R.J. Lemerise, Utica, Mich.