Tater wrote:

I wonder how the force of the high speed spinning blade is disipated? I
am betting that you have to replace more than the blade and brake unit,
like say motor shaft, motor mounts, motor adjustment screws and
anything else the torque throws out of whack.

No, the trunnions, bearings, etc. are built extra heavy to absorb the shock.
IIRC, the trunnions alone weigh over 300 pounds.

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It's turtles, all the way down