Belt sander affect the grinding quality

The speed of the belt sander has a crucial influence on the grinding quality, which is mainly reflected in the following aspects:

Cutting efficiency and material removal rate

A higher speed can improve the cutting efficiency of the abrasive belt and increase the material removal rate. When the speed of the abrasive belt machine increases, the number of times the sand grains on the surface of the abrasive belt contact the material being abraded increases per unit time, and the impact and cutting effect of the sand grains on the material becomes more intense. For example, when grinding a metal plate with a thick rust layer, a high-speed abrasive belt machine can quickly remove the rust layer and save grinding time. However, if the speed is too high, it may cause the sand grains to over-cut, resulting in deeper scratches or grooves on the surface of the material, affecting the surface flatness.

At a lower speed, the cutting action of the abrasive belt is relatively gentle, and the material removal speed is slow. This situation is suitable for situations where high grinding accuracy is required or the material is thin and soft. For example, when grinding thin wood or the shell of precision instruments, a lower speed can avoid damage to the material due to excessive cutting, and it is also beneficial to control the amount of material removed and achieve fine grinding.

Surface roughness

The rotation speed has a direct impact on the surface roughness after grinding. High rotation speed makes it easy for the sand belt to leave rough marks on the material surface. This is because when the sand is running at high speed, the cutting force of the sand grains on the material is greater, and because the contact time between the sand grains and the material is short, there is not enough time to grind the surface very smoothly. On the contrary, low rotation speed allows the sand grains to have more time to finely grind the surface of the material, thereby obtaining a smoother surface. For example, in furniture making, in order to obtain a smooth wooden surface like a mirror, a belt sander with a lower rotation speed is usually used in the last few grinding processes with a fine sand belt for grinding.

Grinding heat generation and material deformation

A belt sander with too high a speed will generate more heat. During the sanding process, the friction between the sanding belt and the material will generate heat. The faster the speed, the more intense the friction, and the more heat will be generated. For some heat-sensitive materials, such as plastics and soft metals, excessive heat may cause the material to deform. For example, when sanding a plastic model, if the belt sander speed is too high, the plastic surface may soften and deform due to heat, affecting the quality and dimensional accuracy of the product. Properly reducing the speed can reduce the generation of heat and reduce the risk of material deformation.

Abrasive belt wear and service life

The rotation speed will also affect the wear speed of the abrasive belt. At high rotation speed, the sand grains of the abrasive belt are more likely to fall off and wear. Because the high-speed operation makes the sand grains bear greater impact and friction, the service life of the abrasive belt is shortened. Reasonable control of the rotation speed can ensure the grinding quality while extending the service life of the abrasive belt and reducing the grinding cost.

If you have any questions or need more details about the belt sander, please feel free to contact us and we will serve you wholeheartedly!