How to use and maintenance of the huller

If it does drying of the paddy, it is hulling the rice work. There are many places working on hulling the rice by paying own expenses in the large-scale farmhouse, but thinks that drying and the hulling the rice work of the paddy tend to depend on an outside specialty supplier in the small farmhouse like me.

About the huller

I asked a supplier for only hulling the rice work conventionally because I owned a paddy dryer. However, I must carry paddy to a supplier to do hulling the rice. And it goes down, and I must go for unpolished rice if hulling the rice is completed. I must be absent from work, and this was very troublesome. In addition, hulling the rice rate is high.

Therefore, for several years, I decided I purchased a used huller, and to work on hulling the rice by oneself. I did not get along well, but I made trial and error and got possible to easily do hulling the rice now when I tried it.

hulling method (rubber roll type and impact type)

There are roughly separately a rubber roll type and an impact type in the method of the slough of hulling the rice.

Rubber roll type paddy method

The rubber roll type is a method to make them grind the paddy with the velocity differential where two rolls rotate when the paddy passes between the rotating rubber covered rolls and it comes off and slough off old skin. Because the efficiency of a lot of hulling the rice falls extremely, the volume of water of the paddy should adjust the volume of water of the paddy to 15% or less.

The ability of hulling the rice is decided depending on the size of the rubber covered roll. 2-5 inches are general.

Impact type hulling the rice method

The impact type (impeller type and jet type) is the methods to remove collision to the wall as for the paddy flew by the runner that rotates at high speed. The volume of water of the paddy is in this method and there is a feature to be able to do hulling the rice a lot. It is adopted for a small huller.

Selection method of huller(far movement type, rotary, and Mangoku type)

As for appearing, mixture is still in a state paddy and unpolished rice just after hulling the rice. Because cracked rice and broken rice occur, and quality falls 100% in paddy as for this at a time when I let you make self-renewal, the reason is because it drops efficiency of the ecdysis on purpose. Therefore I sort paddy and the unpolished rice after hulling the rice and submit the paddy that it was not made self-renewal to a hulling the rice process again, and it is it in the unpolished rice that approximately 100% chaff was finally removed. There are three kinds of methods (the far movement type, the rotary, and the Mangoku type) to select this paddy and the brown rice.

Far movement type selection method

The swing type is a method to select the brown rice and the paddy from the difference among far movement [sase], the specific gravity, and frictional properties at the same time in the horizontal and vertical direction as for the swing board that applies the inclination with the hollow. It is ..winnowing (.. method near it in old times manual though grain was assorted with seeing). Almost 100% brown rice can be selected if it adjusts it well. This is the same principle as the stone pulling out machine of the swing selection type.

Rotary selection method(rotary selection method)

The rotary type is a method to use and to select the rotation of a cylindrical thing that the hollow adheres internally, and can the flight of the paddy and the brown rice in a cylindrical cylinder, and the fall positions different because of the specific gravity and barycentric position's differences. Handling is easy though it is difficult to select 100% brown rice.

Mangoku selection method

Grain sorter Mangoku type is a method to select the paddy to make on the inclined reticulation slough off old skin and the brown rice and the paddy the brown rice is passed it. The selection of the size of the reticulation and the adjustment of the tilt angle are difficult, and skill and the technology are necessary for handling. It is a method that is from of old.

How to use of the huller.


This photograph is Yanmar rotary huller that I am using. The model It is a huller of the RHM25 rotary selection type 2.5-inch roll. It obtained it cheaply used machine because it did not use it so much. The origin cannot be taken with the new article.

Power is a gasoline engine. It bought and it substituted it because it was too old and outed off form though the far movement type of [Satake] of three aspect 200V power had been used before this huller was used.

The brown rice that went out of the huller is passed through the rice sorter and small rice is selected. It is a sorter of the rotary type of rice grader of [Satake].

The hulling the rice work will process the paddy of half the amount of the autumn harvest later soon. As for half the following paddy, it keeps during half a year in the grain dryer, and hulling the rice works in around April. It can eat delicious even a little rice by doing so.

Use procedure of huller

Attention and maintenance when huller is used

Efficiency and accuracy of hulling the rice

The accuracy of hulling the rice (The fewer the ratio of the paddy contained in the rice of finish is, better) worsens when the efficiency of hulling the rice is raised. It will work by this.. balance of this two conflicting. The volume of water of the paddy also influences efficiency and the accuracy of hulling the rice.

If it eats the brown rice, it is necessary to improve the accuracy of hulling the rice as much as possible. There is no problem because the paddy disappears at rice cleaning even if accuracy is a little bad if only the cleaned rice food is done. There is nothing except that the accuracy of hulling the rice is still improved when thinking it eats the rice of five amounts. The balance around here is a difficult point.