Sanding Drum for Column Drill, I had been wanting to make a sanding drum for a long time. We all know that sanding by hand is a hassle. And when we buy our first electric wood sanders, we usually buy sanders that are mainly used for sanding flat surfaces.
Sanding Drum for Column Drill

Not long ago we saw how to make a disc sander for the drill, which apart from sanding edges is also used to sand exterior curves.
So in this post we are going to see how to make a sanding drum to sand interior curves with the drill press.
This is a carpentry project that surprised me by how easy it was to carry out.
In addition, it is also surprising how easy it is to sand with this wood sander.
So, to make the sanding drum I have to cut the circular pieces that will form it.
In this case I use a 60 millimeter diameter crown bit to cut 5 plywood discs 14 millimeters thick.

Although I decided to take advantage and cut 10 pieces to make two sanding drums. This way I can put two different grits of sandpaper: 120 grit sandpaper and 320 grit sandpaper.
And now it's about gluing 5 discs together with an 8 millimeter threaded rod that passes right through the center.
To do this I first have to drill an 8 millimeter hole right in the center of each disc.
And the centering bit of the crown bit is slightly smaller than those 8 millimeters, so I had to re-drill that hole.

The plywood table on which I cut the discs has the mark of the crown drill bit, so I avoided moving the table and it serves to center the plywood discs so I can drill right in the center with the 8 millimeter drill bit.

Then:
- I put a self-locking nut on the threaded rod.
- I applied epoxy resin and glued a large washer against the self-locking thread.
- I applied epoxy resin on the washer.
- I put the first disk against the washer.
- I was applying carpenter's glue and gluing one disc on top of the other.
- I applied epoxy resin on top of the last disc and put a large washer on top.
- I applied epoxy resin on top of the washer and pushed a nut against the washer.
- And with two wrenches I tightened both nuts tightly so that the excess glue came out between the plywood discs.
- I cleaned the glue and let it dry.

This way I have the shape of the sanding drums, although the surface leaves a lot to be desired.
But with a piece of sandpaper clamped to a piece of plywood and the help of the metal column of the drill press, I can grind the drums.
We can see the difference between sanding and not sanding in the photo in which I show the two sanding drums.

But in order to use this as a wood sander, I have to put sandpaper. And the easiest thing I could think of was to cut a vertical slot with the hand saw.
Well, it wasn't easy either, since holding the sanding drum well with some carpenter's clamps wasn't easy. But in the end I managed to cut the slot.

The width of the slot is just right to fit one end of the sandpaper. And the sandpaper is glued with stencil glue.
We must use a somewhat strong stencil glue and we must make sure that we roll the sandpaper in the opposite direction to the direction of rotation of the sanding drum.

Now I can put a bearing in the bottom end.
I chose a bearing with a diameter of 3 centimeters. I put it against the self-locking nut and put two nuts on the other side so that they lock together.
The inner diameter of the bearing is slightly larger than 8 millimeters, so to prevent the sanding drum from rIt may be off center, I left it a little loose between the nuts.

I'm also going to need a sanding table. Well, a table on which to rest the pieces to be sanded while I use the sanding drum as a wood sander.
As you can see in the image, it is not at all complicated to do.

I just drove a couple of bolts into a small plywood board and screwed another small board on top.
The bolts are positioned so that they fit into the slots in the metal table of the drill press.
This way I can hold this table with some washers and some wing nuts, just like when I made this drill press a drilling table with a side guide.




Now I have to screw another slightly larger board on top and drill the necessary holes to fit the sanding drum.
With a 68 millimeter hole saw I was able to drill the top board. And with a 3 centimeter diameter cup drill bit I drilled a hole to fit the bearing.

This way I can easily sand the interior curves or any other surface of my carpentry and DIY projects.
And so far everything is very nice, but after a while using this wood sander without any major problems, suddenly a few very hot days came and the sandpaper began to come off when turning in the drill press.
Although after some tests I found a simple solution that works perfectly for me.
If you want to know what it is, don't miss this video:
Source: https://enredandonogaraxe.club
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