Just from watching Gold Rush on TV, I think you are talking about bars the are straight down the pipe, is that correct? If so, and if the pipe isn't too long, you might be better off attaching strips to the inside walls of the PVC.
You must be using something like the thick wall pipe used for smaller mains.
If you made the strips of plastic, you could lightly afix the strip to a piece of wood, apply the epoxy or glue, run the wood strip into the pipe with glue applied just before inserting it. Then flip the wood carrier over so the glue contacts the walls. Personally, I can't see this lasting very long.
The trommels on Gold runs have water sprays near the top of and running the length of the trommel. The water washes the gold and smaller gravel off the larger stones and gravel. This means there needs to be some sort of grill so the gold washes out of the trommel into the rocker where water flows and the gold settles into riffles or a mat. The picture shows the trommel as a metal, heavily perforated tube. So I'm not sure you can make a PVC tube do this. If I were doing this, I'd find some flat stock with openings in it, install the bars while it's flat, then have someone weld the thing into a tube. I think that would hold up for some time with moderate usage.
Looks to me like the trommel has to have open ends for rock going in one end and out the other, and wash water going in the tube at one end.
Looking at the picture below, I notice that the separated gold and smaller particles drop down to a box that flows the opposite direction, then dumps the paydirt onto the end of the rocker.
If you were going to do this with a PVC pipe, you could put in the bars, the drill a LOT of holes between the bars.
One last thought about the bars. Use some steel L bars, pre drill 3-5 5/16th holes to bolt it in place in the tube (Drill the center holes through the PVC from the outside of the tube), then drill the holes near the end where you can reach more easily. I'd use stainless bolts. Use a washer on the outside to reduce stress on the pvc tube.
I assume you will be running a generator and water pump, or prospecting where you have sufficient gravity flow. I'll be curious about how you rotate the trammel tube.
The more I do, the less I accomplish.
Last edited by DesertRatTom; 03-16-2017 at 05:35 PM.