6 inch disc on a 5 inch sander


Grasslakedoc

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I have a 5 inch random orbit sander and am looking to go for a high-gloss lacquer finish.  I see one way is to use 1000+ grit sand paper, and inherited a pack of 6" Abrasion discs.  Will I get good results from using the 6" or should I spring for the 5" online?  Thanks much in advance.

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Depending on the sander it may not make much of a difference. The key is maintaining a random orbit with a rotary action. If the sanding pad gets dogged down and no longer maintains a rotary action tour going to be left with deep pigtails. If the pad keeps rotating with the random orbit then you'll get a clean sanding action.

If it dogs down, lighten the downward pressure. Worst case is you use the sander for the bulk work and finish up by hand to get a more uniform scratch pattern :-)

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