⚙️ Technical Compatibility
- Hole Size: Custom to requirements
- Compression Ratio: Tailored to feed formula
CPM 7930 Roller Shell for Feed Pellet Mills (Alloy Steel)
Case-Hardened Construction: 20CrMnTi alloy steel is case-hardened to HRC 58-62 on the working surface while maintaining a tough core to resist impact loads.
Precision Ground Surface: CNC ground roller shell surface ensures optimal clearance with the ring die, maximizing pellet quality while minimizing power consumption.
| Material | 20CrMnTi Alloy Steel |
| Surface Hardness | HRC 58-62 |
| Core Hardness | HRC 35-45 |
| Feature | Case-Hardened / High Wear Resistance |
Why Choose Hongyue Spare Parts?
Precision manufacturing for ultimate pelleting performance.
Precision Assembly
Each roller assembly is balanced and pre-loaded with premium bearings and seals, ensuring smooth rotation and zero wobble under maximum pelleting pressure.
High-Traction Surface
Corrugated or dimpled roller shell surface grips raw material effectively, reducing slip and increasing throughput for both feed and biomass applications.
Sealed Bearing System
Double-lip sealed bearings protect against dust and steam ingress, extending bearing life and reducing maintenance downtime in harsh pelleting environments.
Premium Material & Extended Lifespan
Forged from high-grade 20CrMnTi (Alloy Steel), our replacement ring dies and roller shells offer superior resistance against corrosion and abrasive wear during high-temperature pelleting. Processed through advanced vacuum heat treatment, we ensure a uniform hardness (typically HRC 52-56), which maximizes output capacity while minimizing the cost per ton of feed produced.
Frequently Asked Questions
What is the difference between roller shell and roller assembly? ▼
Roller shell (roller shell) is just the outer cylindrical component. Roller assembly includes the shaft, bearings, and housing. Our shell is a direct replacement for the worn shell only.
How do I know when to replace my CPM 7930 roller? ▼
Replace your roller shell when you notice uneven pellet sizes, increased power consumption, or visible grooving wear on the shell surface exceeding 2mm depth.
Why Material Matters
The lifespan of a ring die is determined by its material composition and heat treatment. We use only certified X46Cr13 stainless steel and 20CrMnTi alloy steel, processed through vacuum heat treatment to ensure uniform hardness and maximum wear resistance.
🐟 Feed Ring Die Material
X46Cr13 Stainless Steel
- • Hardness: HRC 52-56
- • Feature: Excellent corrosion resistance for aqua feed
- • Surface Finish: Mirror-polished holes (Ra ≤ 0.8)
🪵 Biomass Ring Die Material
20CrMnTi Alloy Steel
- • Hardness: HRC 55-62
- • Feature: High impact strength for wood fibers
- • Tensile Strength: ≥ 1080 MPa
Hole Finish
Ra 0.8
Precision Gun Drilling
Hardness
HRC 52-62
Vacuum Heat Treatment
Accuracy
100% Check
Final Quality Inspection
✓ OEM Brand Compatibility
* Disclaimer: Hongyue Machinery is an independent manufacturer of premium aftermarket replacement parts. Any reference to original equipment manufacturer (OEM) brand names, trademarks, or machine models (such as CPM, Buhler, Muyang, Zhengchang, etc.) is strictly for the purpose of identifying compatibility. We are not affiliated with, sponsored by, or endorsed by these manufacturers.