The Shop > Wood & Stuff
Drum/ Thickness Sander
S. Heslop:
Drilled about 10 holes in a scrap of plywood trying to get one that's a good fit with these 47mm bearings. When I finally get one that seems good, I push the bearing in and then it falls out the other side. Turns out the hole cutter is cutting more of a cone shape.
I might maybe be able to take advantage of that, but I think I might try grinding the cutting tool to look more like what you get in commercial ones. As it is, it's still the shape of a lathe boring bar.
awemawson:
Can you cut your hole, slice across a diameter, then screw to a board making a sort of split housing with a tight fit ensured by the kerf of the cut.
S. Heslop:
--- Quote from: awemawson on February 10, 2015, 02:13:48 PM ---Can you cut your hole, slice across a diameter, then screw to a board making a sort of split housing with a tight fit ensured by the kerf of the cut.
--- End quote ---
That's not a bad idea. I'll have to think about how best to do it though.
Took the table apart again to hammer in one of these threaded inserts. These ones have barbs to hold the thing in, rather than a screw, so i'm putting them in from the other side.
I added one more disk of 12mm plywood to make up the rest of the distance. Also screwed the ends on.
Hopefully i'll get the drum round tomorrow. I'm wondering if maybe I should true the drum to the table (after rough turning) by passing a board with sandpaper on underneath it. The drum is wider than the table surface, but I could probably stick the board with sandpaper on it between some parallels.
S. Heslop:
I've had a cold over the last few days so not much work done. Mostly because the wood dust was killing me. Excuses excuses.
Figured out why the hole cutter cuts a tapered hole, the answer is pretty obvious; the adjustable bar just slightly rotates from the pressure of cutting. I cut a few trial holes to hopefully stop it from moving any further then cut the bearing hole. First one was a nice tight fit, but the second one wasn't so I expodied that bearing in.
Don't have a good shot of the turning setup yet. I've changed it around after this photo since the motor runs clockwise.
I made a pulley for the 20mm shaft the hard way. Ideally i'd just use the lathe, but i'm trying to avoid it for this project, so I'm cutting it on the router table. The one on the motor should be less of a challenge.
Used some wedged pieces nailed in to the board to get a close enough angle to match the pulley. It was still a ways off but hopefully it won't cause any trouble. If it does, i'll just cut it again on the lathe and lie about being successful with the router table!
S. Heslop:
Turned the drum round.
Then removed one of the end pieces and cut a sector out of it. I cut my finger with a chisel fitting a door a few days ago, and it's one of those cuts that you just seem to bump on everything and keep re-opening.
Then a trapezoidal block holds the paper in. As a part that will probably see a fair amount of use, a threaded insert would probably have been preferable here. But I suppose i'll replace it if or when the thread wears out.
With the paper wrapped around I was able to find where to cut the other sector out. Fortunately it landed in between the screw holes.
No shots of it holding the paper on at both ends, since the first trapezoidal block split in half and is being glued back together. I'm using counter sunk screws in a countersunk hole, which wasn't a great idea. I've stuck a washer in the hole to hopefully stop it from wedging the part in half again.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version