Differences and Types of Hammer Mill & Roller Mill.

Hammer Grinder Mill

More exceptional particle size can be achieved in as we compared to the roller mill. With proper filtration, the hammer grinder mill allows for more efficient use of malt grains by increasing surface area. It will require fewer grains to make the same amount of beer when using a hammer mill.

The hammer mill power consumption per pound generally higher than roller mill, but highly efficient on Circ-U-Flow model hammer mill due to 300-degree screen and large rotor diameter resulting in high tip speed.

According to the shape of the screener, hammer grinder mill can be classified into a half-screen hammer mill, full-screen hammer mill, and the screen less hammer mill. According to the production capacity and size, it can be classified into the small hammer mill and large hammer mill.

Small hammer mill

Small hammer mill is also known as half-screen hammer mill because their screen cloth is a semicircle covering the lower part of the rotor. The toothed plate is installed in the upper body. Raw materials are to be fed along the tangent line of the crushing chamber.

Small hammer mill is a general type. It adapts to different working conditions. It features small size, low cost and smooth operation. Small hammer mills are often applied in farm, small feed mill, small pellet production line, and wood processing plant.

Large hammer mill

Large hammer mill is also known as drop-shaped hammer mill. The electric motors and rotor are welded on the same steel plate base. A pin coupling directly connects them. With a dynamic balance experiment, the rotor can be rotated in both of the directions. The feed hopper is at the top of the hammer mill. You can equip it with a rotary feeder. The hammers are to be arranged symmetrically. The operation door is fitted with an interlock device to ensure it is closed during running.

Roller Grinder Mill

The traditional method of dates back to the wind and water power reduces the particles using a compression force. 

The roller grinder mill power consumption as per pound is generally lower, but throughout the hour also lower.

There are no grates or screens used to regulate particle size. Instead of, particle size and consistency are purely based on the miller's skill in setting the roller mill effectively. 

Post grinding is impractical because ultimate particle sizes are more irregular and bigger, requiring more attention and care to achieve consistent and accurate grind.

Available capacity of grain is a significant consideration because it can take larger or multiple roller mills to achieve the same position as a hammer mill.

Pneumatic systems are not easily integrated for use with a roller mill.

When roll chills become worn, replacing or corrugating the old chills is more expensive and time-consuming.

Types of Roller Grinder Mills 

Two-roller mills: - Two roller mills are the most straightforward variety, in which the material is crushed between the two rollers before it continues to its final destination. The operator can adjust the spacing between these two rollers. Thinner spacing often leads to that material being crushed into smaller pieces.

Four-roller mills Four-roller mills have two sets of rollers. When you are using a four-roller mill to mill grain, the grain first goes through rollers with a rather wide gap, which separates the seed from the husk without much damage to the husk, but leaves large grits. Flour is sieved out of the cracked grain, and then the coarse grist and husks are sent through the second set of rollers, which further crush the grist without damaging the crusts. Similarly, there are three-roller mills, in which one of the rollers is used twice.

Five- and six-roller mills Six-roller mills have three sets of rollers. When using this type of mill on grain, the first set of rollers crush the whole kernel, and its output is divided three ways: Flour immediately is sent out the mill, grits without a husk proceed to the last roller, and husk, possibly still containing parts of the seed, go to the second set of rollers. From the second roller, flour is directly output, as are husks and any possible seed still in them, and the husk-free grits are channeled into the last roller. Five-roller mills are six-roller mills in which one of the rollers performs double duty.

You can buy or find the best hammer mill manufactures online very quickly. 

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