King:
Short answer:
- adds weight, like a flywheel, to spinning TS blade helps dampen out minute speed variation if belt driven TS.
- Stiffens TS blades so less flexing left to right during cutting of hardwoods (long rip cuts mostly)
- Removable if deeper saw blade depth is needed.
Long Answer:
Forrest Saw Blades - Forrest Dampener / Stiffener Information
Sales pitch by one maker. There are several. Prices vary.
Aside: Fairs, Tool shows, woodworker shows, etc, can find TS stabilizers as (on?) "show special" discount. Then when you go up to purchase at the show, the salesman hits you up for a 20% discount on a new TS blade, as a package, but WAIT, there's more! With just a few dollars more on your credit card you can proudly add to you workshop, your *professional* grade workshop I might add, ........ (yada, yada, yada!)
Phil