Customized Heavy-Duty Roller Shell For CPM 7936-14 With High Cost Performance

Introduction

Founded in 1989, Shanbao Machinery is a leading manufacturer of feed machinery components, specializing in the integration of production, sales, and service. Our headquarters is strategically located in the Meishan Industrial Park, Sichuan, China, covering an expansive area of 40,000 square meters. With three dedicated plants for forging, casting, drilling, and fine turning, we are unique in being the only die manufacturer in China with its own forging and casting facilities, allowing us to maintain rigorous quality control from the outset.

Over the years, we have supplied high-quality roller shells for renowned brands such as Buhler, CPM, Andritz, and more. These roller shells play a crucial role in the pellet mill, working in tandem with dies to effectively granulate feed.

Shanbao Machinery Roller Shells

Our roller shells are crafted from GCr15 high chromium stainless bearing steel, ensuring exceptional hardness and wear resistance. We meticulously control the dimensions of each roller shell to achieve a coaxiality of less than 0.05 mm between the inner and outer circles, and a geometric accuracy of less than 0.2 mm for the outer circle. The surface hardness ranges from 58 to 61 HRC, with a bearing bore surface roughness of Ra 0.8-1.6. These specifications are achieved through comprehensive heat treatment and tempering processes, which guarantee both hardness and depth durability over time.

Different Types For Choose

We offer six distinct types of roller shells to meet various operational needs, ensuring that our customers can find the perfect fit for their pellet mills.

Standard Roller Shell Dimensions

• Outer Diameter: Generally ranges from 200 mm to 400 mm, depending on the specific application and machinery requirements.
• Inner Diameter: Usually around 100 mm to 200 mm to fit standard shafts.
• Width: Typically between 50 mm to 100 mm, tailored to the pellet mill design.
• Surface Roughness: Ra 0.8-1.6 for optimal performance and compatibility with dies.

How does surface roughness affect pellet quality?

1. Pellet Integrity

• A smoother surface on the roller shell minimizes friction and allows for more uniform compression of the feed material. This leads to better pellet integrity, reducing the likelihood of cracks or breakage.

2. Feed Material Flow

• The surface roughness influences how feed materials flow through the die and rollers. A rougher surface can cause friction that may impede flow, while an optimal roughness promotes smooth movement, ensuring consistent pellet formation.

3. Pellet Density

• Smoother surfaces contribute to more effective compaction of the feed, resulting in higher pellet density. This is crucial for achieving the desired physical properties of the pellets, such as durability and resistance to crumbling.

4. Wear and Tear

• Roller shells with excessive roughness can lead to increased wear on both the roller and the die. This degradation can affect the quality of the pellets, as worn components might not produce pellets with the required specifications.

5. Surface Finish of Pellets

• The roughness of the roller shell can directly impact the surface finish of the pellets. Smoother rollers typically produce pellets with a finer surface, which can enhance marketability and reduce dust generation during handling.

6. Consistency and Uniformity

• Consistent surface roughness ensures uniform interaction between the rollers and the feed material, leading to more uniform pellet sizes and shapes. This consistency is vital for meeting quality standards in various applications.

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