Sand Muller

[dallen]

When I posted the photos of the spacer ring that I made for my mill I posted a partial photo of my muller and was asked by Mayhem asked for some information on how I built it.

so grab some & while I

So sorry but everyone will have to over look the mess around the muller I have been casting for the last couple days trying to finish up a flask project that I started quite some time back.

The first photo is the basic overall photo from one side.


The second is from one angle on the drive showing the sheaves which are 4" and 13.9" this sheave combination along with the sprockets two 10 tooth and two 40 tooth sprockets drop the RPM of the business end of the muller to around 50 RPM.


this third and fourth photo's are of the chain drive components I also added in a idler which is not spring loaded but is bolded down tight enough to stay in place, I need to add another idler on the final chain to the drive shaft just for good engineering



Fifth photo is of one side of the Drive Head with wheel and scraper arm

Sixth photo is of the other side


I had bought a book written by Steve Chastian on how to build a muller, (my disclaimer) I didn't follow the book. I decided that I didn't need the strength that he built into his or the cost that it would take to build one like his.

That said, I did use his drive design but only use a 1 7/16 shaft instead of a 2 inch one. I did use his drive tube design with tapered roller bearings.
He used two wheels and scrapers I used one, and mine is made from an 8 inch diameter gear welded into a 2 inch wide piece of Sch 40 8 inch pipe, so far it works and works well.

One problem I have is it does not like to start with two 5 gallons of oil bonded sand in it, thats about 160 pounds of sand, one thing I would like to and probably will change is the depth of the tub which I made 12 inches, 14 would be better so that the sand would not crawl out, Petrobond sand has a tendency to grow when mulling it especially when warm.

Meyhem I hope this is what you were wanting, if you need more info let me know.

David Allen