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Originally Posted by 2KLS1 Well with a PC you're applying more pressure with a smaller pad even if you're pushing down with the same amount of force as with a bigger pad since the contact area with the panel is smaller. With a rotary I've actually read the opposite, smaller pads are safer. |
Yes and No. No matter what your using, RO or Rotary, the smaller the pad the more harmful it is. With both the RO and Rotary, its takes less force the make the 4" pad spin a full rotation. Less force = more rotations. With more rotations, the heat created is much greater because the surface area the pad touches is smaller. Its hard to explain without showing...
Give it a try on a test panel...use a 4" pad and a 6.5" pad, hold it in one spot for a certain amount of time and see how hot each one gets. The 4" will probably burn thru and be VERY hot.