A while back I picked up one of these belt/disk sanders (Gumtree) to replace the old hand held belt sander that I used to turn upside down and sit it on the bench, I ordered a selection pak of belts from Ebay with various grits, and set it up with the belt in the vertical position and up until now I have only used it for wood, plastic and fibreglass sheet with no issues. I had need to shape some brass and have noticed that there is marked thump as the join on the belt passes the brass being shaped, I have never noticed this from the old hand held belt sander - is this normal or have I just got a cheap set of belts with poor lumpy joins ?
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