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Monster Mill MM-3Pro 3-roller Mill with Heat-treated Rollers
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Monster Mill MM-3Pro 3-roller Mill with Heat-treated Rollers


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The 3-roller MM-3Pro Monster Mill with Heat-Treated Rollers is recommended for all commercial applications. Heat treated rollers last 10X as long as the standard steel rollers.

The MM-3 crushes all your grain twice, with one pass through the mill. It starts with a preliminary crush through the initial fixed gap between the top two rollers, and then ends with a pass through the second gap between the drive roller, and the bottom third roller. The initial pass slightly flattens the grain, and gets it ready for the next crush, that breaks apart the grains and loosens the starch with minimal husk damage.

Base and hopper not included.

This mill will NOT mill corn.  It is designed for barley and wheat malt, rye, and unmalted wheat. For corn see the 2Pro mill (65612HT).

  • CA$565.00
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  • SKU
    65613-HT

The MM-3Pro consists of a 6061 aluminum block frame with three 6" long steel rollers riding on SAE 841 oil impregnated bronze bushings. The superior grade of steel is much harder than what is found on most comparable products and and the rollers are induction hardened so that they will last 10X as long as comparable products. The 1144 alloy rollers are heat treated to approximately 51-54 Rockwell C hardness. This is what you want for any mill used in a commercial environment. Commercial brewers have crushed 200,000 lbs+.  The drive shaft, and all the axles are integral to the roller rather than screwed into the ends. This makes it fine to drive the mill clockwise, or counter-clockwise. All the axles are 3/8", with minimal freeplay in the bushings. 

One knurled steel roller is driven by a standard electric drill (not included) to feed the grain through the initial fixed gap of approximately .065", and then through the adjustable secondary gap and crush the grist. Both ends of the non-driven top idler roller ride in bronze bushings that are pressed into the frames, while the second idler roller rides in bushings that are offset mounted in an adjustable knob. The billet knob is held in a fixed position by a black oxide bolt you can loosen to adjust the mill. This system provides an adjustment range of .065". The knobs are milled from solid 6061 aluminum barstock for excellent durability. The flange has two semi-circular slots that allow you to attach the knob positively to the face of the aluminum frame. They have 12 sides for a positive grip.  

Plain steel mills kept indoors, and used regularly won't have rust issues. Non climate controlled areas, or minimal usage could see some corrosion come up that is easily removed with a wire brush.

This mill will NOT mill corn, and doesn't work well with rye by itself.  It is designed for barley and wheat malt, and unmalted wheat.  For corn see the 2Pro or the 2ProPD.

6" Long Adjustable Gap:

  • fully adjustable mill
  • three six-inch steel rollers form two gaps, a preliminary fixed gap of approx .065", and a fully adjustable secondary gap
  • dual eccentric adjusters: 0 to .065" secondary gap - milled from solid 6061 billet aluminum
  • 3 x 6" long, 2" diameter 1144 alloy heat treated steel rollers
  • drill-drive - CW, OR CCW
  • 13 lbs/minute throughput
  • alloy frame
  • SAE 841 oil impregnated bronze bushings
  • 2" diameter 1144 steel alloy heat treated rollers
  • 1/2" integral drive shaft standard w/3 flats for drill driving, 2" long outside frame
  • 3/8" integral axles
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