sanding drum stem
Hello all. I need some advice on a homemade sanding drum for my drill press, so naturally I'm asking the smartest bunch of people around.
I was out in the workshop (my 1/4 of the garage) early Sunday morning and found the need for a long, slim sanding drum for a bandsaw box I'm doing. I needed one at least 4 1/2 inches long by about an inch diameter. Besides not being able to spend a lot for a new drum, I couldn't even find anything that size online.
I poked around in my junk and came up with a piece of 3/4" ID pvc water pipe. It's slightly over 1" OD but close enough. I found some rubber grommets that were on packing screws on the new furnace that fit the ID of the pipe and the hole in the center of the grommets was a snug fit for a 1/2" threaded rod.
I cut the pvc pipe 6" long and used nuts and washers to pinch the pipe/grommet assembly tight. For the time being I just taped the sandpaper to the pipe with double sided, wrapped it tight, then used 3/4" masking tape around the top and bottom of the paper. 3/4" at the top and bottom left 4 1/2" of the drum to wrap the paper on.
I put the drum into the drill press and, surprisingly, it worked fairly well. But it sometimes loosens in the chuck and gets out of perpendicular to the table. Then I have to straighten and retighten. I'm thinking that maybe the threads on the rod are mashing when the drum gets some side pressure. It could be dangerous, certainly inaccurate, and a pain to have to stop and remount it.
If it is being caused by the threads on the rod mashing, does anyone have any suggestions for wrapping the threads with anything to keep it tight in the chuck? Thanks. Jim