Have you thought about the blade on your tablesaw, or in your circular saw, and actually considered how the power of the motor is transferred to the blade?
Although the arbor is spun by the motor, the power doesn’t transfer directly from the shaft to the blade. Instead, it is the arbor flange, and arbor washer that do the final transfer of power, and that is achieved through the tightness of the arbor nut. Yes, yes – what is the point I hear you ask.
Simply, the more contact area there is between the arbor washer & flange and the blade, the less chance of slippage. Not only that, but these two items also provide significant stability to the blade, especially thin kerf blades.
About the only weakness I’ve found with my powerful TS10L is the arbor washer. It appears to have been formed by a stamping, rather than a machining process. Over time, this has compressed / collapsed, so the contact area was reduced to a thin strip all round, and has gone from contacting on the outside edge, to a ring very much (and undesirably) closer to the centre.
So it has become time to replace. In the first instance, I have replaced it with a very stocky, machined arbor washer. However it has also reignited a desire to track down blade stabilisers. They don’t seem to be very common. CMT have some in their range, so I am trying to source them through Carbatec. They are effectively a large arbor washer for both sides of the blade, providing excellent load transfer, and primarily significant blade stability. They do have a drawback that they reduce the maximum depth of cut, but for cuts where that is important, you can always remove them and resort to the normal flange & washer.
A blade stabiliser is 2-3 times the diameter of the typical arbor washer.