2 or 3 roller mill? MM or Crankenstein?

[outside92129]

+1 SP.

Or two side plates, front and back.

 

[Irrenarzt]

Agreed, Fred should provide a better way to keep it all square. I have mine squared up but it takes some work to do so. But if you take the time to balance it up, it will perform well.

 

[enricocoron]

Has anyone ever tried or heard much feedback on this mill?

http://www.cambronengineering.com/Oat Crimper.htm

It appears to be a 2 roller mill (cast iron) adjustable from .015 to .120 inch gap powered by a 3/4 HP motor (large model - the 800) which can do 800 lbs. per hour of oats with a 20 gallon steel hopper?

 

[Irrenarzt]

Looks like it could be a nice choice. Can't see much with that little photo though.

 

[jeepinjeepin]

Hopefully this video will work. MM3 with MM base and a cheap harbor freight stand and drill.

 

[jeepinjeepin]

I see the stainless rollers as a waste of money. The hardened rollers are only really needed for a commercial venture. 2 rollers will do but 3 rollers are cool if nothing else. The larger rollers should feed better but I haven't had any trouble with wheat through the standard rollers.

 

[stompbox]

I'm not a metallugist by any means bt I have a masters degree in Chemical Engineering so I suppose I'm close to qualified to answer but 303 Stainless is relatively soft. It's primarily used as a "machinable" grade of stainless as 304 and 316 give machinists a hard time to machine relative to 303. The real advantage of 303 SS is that it won't corrode. Otherwise I think it will wear much faster than the 1144, especially if it is case hardened (heat treated). Here's a summary of each from a site I found.

STAINLESS TYPE 303

Type 303 is highly corrosion resistant & non-magnetic.
It has non-galling & non-seizing qualities which allow for easy machining & is better for lighter equipment if welding is not required.
When cold worked - can become slightly magnetic.
Free machining for heavier cuts in automatic machining operations.
Corrosion resistant to atmospheric exposures, sterilizing solutions, most organic & many inorganic chemicals, most dyes, nitric acid & foods.
Machinability is 70% (1212 crs = 100% & 1018 crs= 78%.
Non magnetic.

STRESSPROOF C1144

C1144 is made by a patented process which consists of drawing the bar through a special die under heavy draft, then stress relieving it in a precisely controlled furnace.
Users can now get wearability without case hardening, strength without heat treating, plus excellent machinability & tool life.
Other benefits include resistance to fatigue & stress, balanced working & minimum warpage & distortion.

Fred has indicated otherwise. He states that 303 is harder than 1144
https://www.homebrewtalk.com/f11/most-durable-grain-mill-57769/index3.html#post590269

 

[jeepinjeepin]

I'm not a metallugist by any means bt I have a masters degree in Chemical Engineering so I suppose I'm close to qualified to answer but 303 Stainless is relatively soft. It's primarily used as a "machinable" grade of stainless as 304 and 316 give machinists a hard time to machine relative to 303. The real advantage of 303 SS is that it won't corrode. Otherwise I think it will wear much faster than the 1144, especially if it is case hardened (heat treated). Here's a summary of each from a site I found.

STAINLESS TYPE 303

Type 303 is highly corrosion resistant & non-magnetic.
It has non-galling & non-seizing qualities which allow for easy machining & is better for lighter equipment if welding is not required.
When cold worked - can become slightly magnetic.
Free machining for heavier cuts in automatic machining operations.
Corrosion resistant to atmospheric exposures, sterilizing solutions, most organic & many inorganic chemicals, most dyes, nitric acid & foods.
Machinability is 70% (1212 crs = 100% & 1018 crs= 78%.
Non magnetic.

STRESSPROOF C1144

C1144 is made by a patented process which consists of drawing the bar through a special die under heavy draft, then stress relieving it in a precisely controlled furnace.
Users can now get wearability without case hardening, strength without heat treating, plus excellent machinability & tool life.
Other benefits include resistance to fatigue & stress, balanced working & minimum warpage & distortion.

Fred has indicated otherwise. He states that 303 is harder than 1144
https://www.homebrewtalk.com/f11/most-durable-grain-mill-57769/index3.html#post590269

When I was looking to buy my mill I asked a buddy who is the QC Manager for a fastener company about the different metals hardness. He said that the 303 would definitely be softer than the others.

 

[stompbox]

When I was looking to buy my mill I asked a buddy who is the QC Manager for a fastener company about the different metals hardness. He said that the 303 would definitely be softer than the others.

<shrug> I am just pointing out what came out of the horse's mouth.... errr the horse's keyboard.

 

[Irrenarzt]

I talked to a professor at Arizona who definitely knows his schit more than us. He says once case hardened, the C1144 is approximately 4 times harder than 303 stainless. If you tried to case harden 303 SS, you would anneal it which in turn would make it much softer. But overall 303 is a tad bit harder to start. So Fred isn't lying when he claims 303 is harder (albeit marginally), but the deal becomes apples to oranges once you talk about heat treatment.

 

[Golddiggie]

Knowing that makes me even happier that I went with the hardened steel rollers with my MM2-2.0 mill.