I've got a couple of choices for material for the drum -- 3/4 cedar, 3/4
plywood, MDF. I need to make about 22 3/4 thick disks and glue 'em
together to create the drum. Any recommendations on which material
I don't have any recommendations for your sander, but I did post a
link, on another thread, regarding tools/auctions. This one may be
near you, if you're interested.
http://irsauctions.com/index_lots.asp?pg=details&id=16093 - note there
are 2 locations, Mosinee and Stevens Point
You need something as dimensionally stable as possible a decent drum
sander can easily take cuts of less than 0.1mm so the drum needs to be
precise. Here in the UK you can buy waterproof grades of MDF for
bathroom applications and I assume its readily available in the US.
Its impregnated with acrylic resin and about as stable as youll find
for any wood-based product Id go with that. You really need access
to an engineering lathe so that you can mount the whole drum assembly
between centres and turn it parallel.
Harder and most dimensionally stable the better...
I'd consider starting w/ a piece of tubing and fill in instead of
turning it up out of wood...
Perhaps as cheap as a piece of Sch 40 or 80 PVC or as exotic as ordering
a piece of 5" Al tubing???
What is the length (width capacity) intended to be and what is the
Of the choices listed, I'd think the MDF the only viable one unless the
ply is expensive stuff--the voids and sorry stuff used as fill in the
normal construction ply will not finish well at all and will be very
difficult to get a truly round, smooth surface as a base for the paper.
Just out of curiosity, I looked at the Griz site--while it sorta'
defeats the purpose of building your own, you could order a replacement
16" drum from the parts for a couple of their drum sanders for just
slightly over $200...shafts, centered, straight, round and smooth w/ the
stuff for the paper mounting already there. Just add bearing blocks and
frame and however you were going to do the drive...
No you don't, dad. The hook and loop work fine for drum sanders
because they don't burn through when you come to hard spots in wood.
I've read several articles on that and most say, in effect, "Go
spongy, but not too spongy."
That's pretty much remedied by a fast current of air over the drum and
wood as it is scavenged from the machine by the dust collector. The
hook and loop can help there, too.
Always bear in mind that your own resolution to
succeed is more important than any one thing.
-- Abraham Lincoln
Soft can make it smooth but not necessarily flat.
As an example, consider edge grain fir...alternating bands of hard and soft.
Hard will sand both equally; soft will sand the soft wood more. That is
true of hand sanders too. If you don't believe me, try sanding a piece of
for ply sometime, either by machine or hand.
plywood, MDF. I need to make about 22 3/4 thick disks and glue 'em together to
create the drum. Any
Once again I have not built a drum sander.
However I do note that both the drum sander in ShopNotes #86 and Pat
Hawley's sander on the Woodgears.ca site both used MDF for the drum.
Both used round disks that were 'trued' by making them into a drum
on its shaft and then spinning the drum against coarse sand paper.
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