FUJI grinding wheels utilize Japan’s distinctive hot pressing process, where phenolic resin and binder penetrate deeply between abrasive particles and alkali-free mesh cloth. Under high-temperature curing, this forms a stronger bond with acid-washed abrasives, creating a denser internal structure. This densification enhances the wheel’s wear resistance and compressive strength, reducing clogging and breakage during grinding. As a result, FUJI wheels ensure excellent safety performance while significantly improving grinding efficiency and machining quality.
In contrast, most European, American, and Chinese manufacturers rely on traditional cold pressing methods. While cold pressing offers high production efficiency, it lacks complete resin curing and strong bonding strength. This leads to higher wear rates, unstable grinding performance, and a higher risk of wheel breakage—posing safety hazards. The hot pressing process demands strict control over parameters like temperature, pressure, and heating time; even minor fluctuations can affect product performance.
With over 70 years of dedicated grinding wheel production experience, unique Japanese formulations, and exclusive process control techniques, FUJI Grinding Wheels guarantees consistent, superior quality in every product delivered. This commitment to precision engineering and technical innovation sets FUJI apart, ensuring reliability and excellence in every grind.
The above photo demostrate the real status of grinding wheel from 125mm (5") of FUJI Super F2 VS Euro Brand after 5min grinding work. The following is a comparison of the advantages of the hot pressing method and the cold pressing method in the processing of resin grinding wheels:
Advantages of Hot Pressing Method:
·High Bonding Strength: During the hot pressing process, the resin binder can better penetrate between the abrasive particles, and it undergoes a curing reaction at high temperature to form a stronger bonding force with the abrasives. This enables the grinding wheel to prevent the abrasives from falling off easily during use, maintaining good grinding performance and shape stability, making it suitable for high-speed and heavy-duty grinding conditions.·High Dimensional Accuracy: In a high-temperature and high-pressure environment, the abrasives and the resin have good fluidity, which allows them to fill the mold cavity more closely. As a result, the grinding wheel product can achieve high dimensional accuracy and a regular shape, meeting the strict requirements of precision machining for the dimensional accuracy of grinding wheels.·Good Denseness: Hot pressing can make the internal structure of the grinding wheel more dense with a lower porosity. This helps to improve the wear resistance and compressive strength of the grinding wheel, reduce clogging and wear during the grinding process, and improve the grinding efficiency and machining quality.
Advantages of Cold Pressing Method:
· High Production Efficiency: The cold pressing method does not require a high-temperature heating process. It only needs to apply pressure to the mold at room temperature to form the abrasives and the resin. The pressing speed is fast, and continuous production can be achieved, greatly improving the production efficiency, which is suitable for large-scale production of resin grinding wheels.· Lower Cost: Since expensive hot pressing equipment and high-temperature molds are not required, the equipment investment and operation cost of the cold pressing method are relatively low. At the same time, the energy consumption of the cold pressing process is relatively small, which also reduces the production cost, giving the product a certain price advantage in the market.· Simple Process: The cold pressing process is relatively simple and easy to master, and the technical requirements for operators are relatively low. Moreover, the cold pressing method has low requirements for the production environment, and no special high-temperature protection measures are needed, reducing the safety risks in the production process.
FUJI is willing to sacrifice some efficiency to ensure that every grinding wheel delivered to customers has optimal performance. That's why we have insisted on using the hot pressing process for all these years—even though it is more time-consuming, labor-intensive, and difficult to operate. This commitment is one of the secrets behind why our products outperform those of big European and American brands in the same category. FUJI places great emphasis on quality management and user experience, prioritizing precision and reliability over mere production speed.
