Roller mill refurb.

[mo!]

Alvan Blanch told me years ago to run a bit of dry sand through our mill every now and again to dress the surface.

 

[Dave W]

I'm sure @Dave W will put a picture up of whatever he decides to do in due course

I know an engineer who used to be a service man for bentall among others. Im sure he'll put me right.

 

[simmy_bull]

It's funny we were talking about this subject at work the other week and an old boy was trying to educate me on the subject as there's some corn coming through the cows I always thought it was just a matter of roughing the surface up but he reckoned more corn goes through the centre of the rollers and the ends end up touching with a gap in the middle hence the need for a more severe straightening up.

 

[davedb]

Could you cut grooves in them with the lathe using the thread cutting feed?

 

[Dave W]

Could you cut grooves in them with the lathe using the thread cutting feed?

We had an old bentall done like that years ago as a bit of an experiment.
It didn't really work

 

[Dave W]

I guess whatever patterning is there to grip the grain and pull it through faster?

 

[JPM]

I guess whatever patterning is there to grip the grain and pull it through faster?

Yeah that's how I would see it..... My murska rollers have worn smooth again. Haven't got round to doing anything with them yet.... They still make a good job just a wee bit slower.
Did look at those fluted rollers kelvin cave supply at one time. They can treble your output but I think the barley might be possibly over processed for feeding to cattle?

 

[AWJ26]

When we had murska 700s, we had superior mills skim and groove the rollers, better output on crimp and dry grain than dimpled rollers.
The grooves need to be angled so the scrapers don't catch in the grooves and also so they don't line up with the other roller and let too many grains through.

 

[davedb]

We had an old bentall done like that years ago as a bit of an experiment.
It didn't really work

Could you do it in 2 directions at a high feed would then cut angled grooves that crossed

 

[Dave W]

Could you do it in 2 directions at a high feed would then cut angled grooves that crossed

That's crossed my mind but not sure you'd get a fast enough feed to give a coarse thread.

 

[davedb]

That's crossed my mind but not sure you'd get a fast enough feed to give a coarse thread.

No you probably won't, bit of a trail and error job on a bit of scrap steel?

 

[jamesy]

My superior has grooves across rollers horizontally.

I did "refurb" my old Fraser by taking top off, set pto going & lightly grinding down the high shoulders. Then redid the grooves with thin cutting disc, fairly improved them.

 

[Full of bull(s)]

I bought a used 700s, as time goes on it’s getting slower although the dimples aren’t that worn. It’s rolling some grains great but missing too many. I’m rolling urea treated barley at about 19% moisture I’m thinking of taking one roller out and machining it smooth and leaving the other as is. Anyone have any thoughts? Old thread I know, found it on a Google search!

 

[AWJ26]

I bought a used 700s, as time goes on it’s getting slower although the dimples aren’t that worn. It’s rolling some grains great but missing too many. I’m rolling urea treated barley at about 19% moisture I’m thinking of taking one roller out and machining it smooth and leaving the other as is. Anyone have any thoughts? Old thread I know, found it on a Google search!

Send them both to superior to skim and groove them, i did our last 700 many years ago, improved output and far better sample. The dimples are intended for green crimp to pull it through, but the scrapers soon wear the high spots off them. My 700 with grooved rollers would do 14 tph on triticale, and you should get into double figures with barley. Get them to check the welds between the hubs and tube, as these quite often need the weld machining off and rewelding.

 

[thesilentone]

I would cut grooves across the rollers, opposite direction for each if you want a decent throughput. We used to use a diamond chisel, slow job but looks much better than grinder.

Latterly we used a grinder as it was quicker, however measure the groove distances and mark them across the rollers with a tyre crayon to keep them even.

Don't make them too deep, they are there to assist feed, and that's it.

 

[Full of bull(s)]

Turns out the bearings were very worn on one roller, so took it out and sent it to a local engineer to be skimmed. There were high points at either end when he looked. Levelled it off with out taking too much of the dimpling out, it’s getting put back together tomorrow so we will see if it’s improved with the skim and new bearings