h-dom
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So it is human powered at the moment but I do have two power unit options. I have a huge old single phase motor which I think is 1400rpm but is probably overkill in power and would obviously need gearing down to around 60rpm. I thought about using a countershaft and going down 1:3 a couple of times but not sure if that will be slow enough at 155rpm. I suppose I could go 1:4 twice to get to 87.5rpm but it's going to mean two tiny pulleys and two big ones.
I also have an old winch motor off a trailer, decent sized motor but I haven't been able to get it started yet. It has an electric brake which I need to figure out the wiring and really strip it all down to get it to work properly. That would be perfect speed wise.
For now though it is fine using it by hand.
It's made from 10mm plate, two 50mm ID flanged housed bearings one either side of one piece of plate and then another piece of plate bolted on the back. That conveniently left a 40mm gap between the plates so I used 40mm SHS as the runners. Plates across the top between the two plates and drilled a 20mm hole to take m20 threaded rod. Welded a nut on each side of the rod so it would turn freely in the plate. Then I drilled a piece of 40mm SHS 20mm again and welded a nut onto the box either side of the hole (with the rod in place so I know the threads will match). This then meant I can wind it up and down. The main roller is 50mm diameter mild steel and runs through the two housed bearings.
Oh, I forgot I had to torch a hole through both of the plates to be able to pass the top roller through. I'm not the smoothest with the torch but got there in the end.
The bottom rollers are just bearings pressed onto a 25mm mild steel shaft which sit in Vs in a bottom rail.
Then to use it I just welded an m20 nut on the top of the threaded rod and used a 30mm socket on that, and on the roller I just welded an extension bar on, this is ok but the height adjustment is pretty tight and takes a lot of effort to turn, so could do with being a bigger handle. Hopefully in time it will loosen up.
The whole assembly is welded onto a piece of 20mm plate with some angle iron down the sides. I found this in a skip, it wouldn't need to be that strong but it worked and gave the whole thing some more weight. I can now either bolt it down to a bench or more likely give it its own table on wheels.
I also have an old winch motor off a trailer, decent sized motor but I haven't been able to get it started yet. It has an electric brake which I need to figure out the wiring and really strip it all down to get it to work properly. That would be perfect speed wise.
For now though it is fine using it by hand.
It's made from 10mm plate, two 50mm ID flanged housed bearings one either side of one piece of plate and then another piece of plate bolted on the back. That conveniently left a 40mm gap between the plates so I used 40mm SHS as the runners. Plates across the top between the two plates and drilled a 20mm hole to take m20 threaded rod. Welded a nut on each side of the rod so it would turn freely in the plate. Then I drilled a piece of 40mm SHS 20mm again and welded a nut onto the box either side of the hole (with the rod in place so I know the threads will match). This then meant I can wind it up and down. The main roller is 50mm diameter mild steel and runs through the two housed bearings.
Oh, I forgot I had to torch a hole through both of the plates to be able to pass the top roller through. I'm not the smoothest with the torch but got there in the end.
The bottom rollers are just bearings pressed onto a 25mm mild steel shaft which sit in Vs in a bottom rail.
Then to use it I just welded an m20 nut on the top of the threaded rod and used a 30mm socket on that, and on the roller I just welded an extension bar on, this is ok but the height adjustment is pretty tight and takes a lot of effort to turn, so could do with being a bigger handle. Hopefully in time it will loosen up.
The whole assembly is welded onto a piece of 20mm plate with some angle iron down the sides. I found this in a skip, it wouldn't need to be that strong but it worked and gave the whole thing some more weight. I can now either bolt it down to a bench or more likely give it its own table on wheels.