A Mill Roller Shaft with shell is a component used in the machinery of industrial mills that grind or crush materials such as grains, minerals, or chemicals. The mill roller shaft is a long cylindrical metal rod that rotates and supports the weight of the rollers, which are mounted on it. The shell is a protective covering that surrounds the shaft and provides additional support.

The shaft is usually made of high-quality steel or alloy and is machined to precise tolerances to ensure smooth rotation. The diameter of the shaft depends on the size and capacity of the mill, and it is typically designed to withstand high loads and stresses.

The shell is typically made of steel or other durable materials and is designed to provide additional support and protection for the shaft. It may also help to prevent contamination of the material being processed by keeping dust and other particles out of the bearings and other components.

Overall, the mill roller shaft with a shell is a critical component of industrial mills that helps to ensure efficient and reliable operation. Its precise design and construction help to ensure long service life and minimal maintenance requirements.