LumberJocks

Sanding machine

  • Advertise with us

« back to Woodworking Skill Share forum

Forum topic by Edwin posted 06-05-2010 05:14 PM 1021 views 0 times favorited 4 replies Add to Favorites Watch
View Edwin's profile

Edwin

97 posts in 1746 days


06-05-2010 05:14 PM

Topic tags/keywords: question

I was thinking about building a overhead sanding machine. I pretty much have it figured out how to build it but one question keeps poping up, Ive’s got a 1750 RPM motor spinning a 4” shaft connected to two pillow blocks…...
Here is the question (Don’t laugh) when you feed the wood in what keeps it from flying out the other side???

-- Ed Port Republic


4 replies so far

View levan's profile

levan

427 posts in 1727 days


#1 posted 06-05-2010 08:25 PM

all the manufactured machines rotate, so the board would actually be pushed back to the infeed side

-- "If you think you can do a thing or think you can't do a thing, you're right". Henry Ford

View richgreer's profile

richgreer

4525 posts in 1822 days


#2 posted 06-05-2010 09:25 PM

levan is right. The drum should spin such that the pressure will be to the input side.

Are you using pulleys that speed up the rotation of the drum? I ask because, in my experience, 1750 is too slow for optimum performance. Most commercial sanders with 3 – 4 inch drums are spinning around 3000 rpm.

-- Rich, Cedar Rapids, IA - I'm a woodworker. I don't create beauty, I reveal it.

View Edwin's profile

Edwin

97 posts in 1746 days


#3 posted 06-06-2010 12:11 AM

I was thinking about 3” sprockets, that should speed up the the speed of the drum, I’m open to sugesstion ???

-- Ed Port Republic

View rance's profile

rance

4147 posts in 1908 days


#4 posted 06-06-2010 01:21 AM

Ed, The size of one sprocket has little to do with the speed. It is more the ratio of size on the motor shaft and the drum shaft. The ratio of the two sizes can be used to increase or decrease the resultant speed of the drum. I’d strongly suggest you look at the design from ShopNotes before moving past your design phase. Goole “Drum sander”. I’m building the ShopNotes model but with some modifications. I’m building it as a stand-alone as opposed to running it from my saw. I’m also motorizing the platten using a rotisori motor. In any case, I think you’ll love your new machine. Go for it.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com

Latest Projects | Latest Blog Entries | Latest Forum Topics

GardenTenders.com :: gardening showcase