How to Choose the Right Soybean Grinding Machine for Raw and Roasted Soybeans

When customers look for a suitable soybean grinding machine, one common question is whether raw soybeans and roasted soybeans should use the same grinding system.

In fact, both raw soybeans and roasted soybeans can be ground into powder. However, because soybeans contain natural oil, the final grinding result depends not only on the material condition, but also on the required powder fineness and temperature control during the process.

Based on our practical experience, the best machine choice is usually determined by the target mesh size.

For 60–100 mesh soybean powder, we normally recommend our YDWS series soybean grinding machine pin mill with a cooling unit.
For powder finer than 100 mesh, we normally recommend our YDWF series soybean grinding machine ACM mill with a cooling unit.

This article explains how to choose the right soybean grinding machine for raw soybeans and roasted soybeans.

1. Raw soybeans and roasted soybeans: What is the difference in grinding?

Raw soybeans have a relatively firm structure and natural oil content. During grinding, they can usually maintain more stable performance in a medium fineness range. But when the powder becomes finer, heat buildup inside the grinding chamber may lead to sticking, screen blockage, or chamber adhesion.

Roasted soybeans are popular in food processing because they provide a stronger aroma and richer flavor. However, after roasting, the internal oil is more likely to release during grinding, especially when the temperature rises. This makes the grinding process more sensitive, particularly in continuous production.

So from a technical point of view, the difference is not simply whether raw soybeans or roasted soybeans are easier to grind. The more important issue is how fine the powder needs to be, and whether the grinding system can control heat effectively.

2. For 60–100 mesh powder: YDWS series soybean grinding machine pin mill with cooling unit

If the target powder size is around 60–100 mesh, the YDWS series pin mill is usually a very practical and cost-effective soybean grinding machine.

This solution is suitable for both raw soybeans and roasted soybeans. In this fineness range, the pin mill can provide efficient impact grinding with stable output. When equipped with a cooling unit, the system can reduce temperature rise during grinding, which is especially important for oil-bearing materials like soybeans.

Why the YDWS series pin mill is suitable for 60–100 mesh soybean powder

Suitable for both raw soybeans and roasted soybeans
Good grinding efficiency for medium powder fineness
Stable output for continuous production
Cooling support helps reduce heat buildup
Helps reduce sticking and chamber adhesion
More economical than ultrafine grinding systems for this mesh range

For customers who want soybean powder for general food applications, seasoning, premix use, or medium-fineness processing, this is often the preferred solution.

soybean grinding machine pin mill screen

3. Why is the cooling unit important for soybean grinding

When choosing a soybean grinding machine, cooling is a very important part of the whole solution.

Soybeans contain oil. During grinding, the faster the rotor runs and the finer the powder becomes, the more heat will be generated inside the machine. If the temperature is too high, the soybean powder may become sticky, and this may affect the final powder quality as well as the production stability.

For roasted soybeans, this effect is often more obvious because roasting makes the material more sensitive to temperature rise during grinding.

By combining the grinding system with a cooling unit, the process can be more stable because:

Grinding heat can be reduced
Oil release can be better controlled
The risk of sticking and blockage can be lowered
Powder discharge becomes smoother
Continuous operation becomes more reliable

That is why we usually recommend not only the grinding machine itself, but a complete grinding solution with cooling support for soybean powder processing.

4. For powder finer than 100 mesh: YDWF series soybean grinding machine ACM mill with cooling unit

If the customer requires powder finer than 100 mesh, then the YDWF series ACM mill becomes a better choice.

As the soybean powder gets finer, the grinding difficulty increases significantly. This is because higher fineness means longer grinding action, more heat generation, and a stronger influence from the oil inside the soybeans. Under these conditions, a standard pin mill may face greater difficulty in maintaining long-term stable performance.

Our YDWF series ACM mill, used together with a cooling unit, is more suitable for fine soybean powder production because it provides better particle size control and better fineness performance.

Why is the YDWF series ACM mill better for finer soybean powder

More suitable for powder finer than 100 mesh
Better particle size control for fine grinding
Helps produce more uniform soybean powder
More suitable for applications requiring smoother texture
Better process stability for fine powder production
Especially helpful for roasted soybeans and other temperature-sensitive oily materials

For customers who need fine soybean powder for higher-end food applications, nutritional powder, instant formulas, or products requiring improved texture and dispersion, this solution is usually more reliable.