If you'd like to build one for yourself, you'll have to make up the dimensions as you custom fit the frame for your wheelbarrow. Rather than describing whats in the pictures, I tried to just take good descriptive pictures so that you could copy the design from them.
Specs for the basic parts
- Gear reduction motor (125 rpm, 1/10hp, 12v, 12 amp)
- 3/4 inch pulley with 5/8 inch bore, but any size pulley will work
- 10 amp manual battery charger
- 1/4 or 1/2 inch wire mesh screen fencing from any hardware store
- The tops of three 5 gallon buckets (two for wheel tracks and one for pulley)
- 8 castor wheals that fit in the track of the bucket rims
- (optional) Rubber floor mat to use for funneling the load into the trommel drum
If you are going to use a garbage can to catch the rocks as they come out of the trommel, you'll find that the wheelbarrow will tip backwards. I shifted my wheelbarrow's legs back 6 inches. The easiest way to keep the cross plate that gives the legs their stability is to turn the legs around before remounting them. If you'd like to save 15 or so dollars you could forgo the mesh screen and bolt two 5 gallon buckets together and then drill "a lot* of 5/16 in holes in buckets to simulate a screen. It works. I tried it, but it won't perform as well as the mess screen. Get a wheelbarrow with two wheels! I overloaded the wheelbarrow a few times and almost it.