⚙️ Technical Compatibility
- Hole Size: Custom to requirements
- Compression Ratio: Tailored to feed formula
Buhler 420 Roller Assembly for Feed Pellet Mills
Swiss Engineering Compatibility: Reverse-engineered to Buhler's original specifications with precise dimensions for guaranteed fit on 420 series pellet mills.
Premium Bearing System: Equipped with high-quality sealed bearings for extended service life in demanding pelleting environments.
| Feature | Case-Hardened / Swiss Spec |
| Material | 20CrMnTi Alloy Steel |
| Core Hardness | HRC 35-45 |
| Surface Hardness | HRC 58-62 |
Guarantee
Quenched
Shipping
Why Choose Tianyou 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.
3D Interactive View
Hover your mouse to rotate. Inspect the part from every angle.
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
Is this roller assembly compatible with both Buhler 420.108 and 420.138? ▼
Yes, our roller assembly fits both Buhler 420.108 and 420.138 models as they use the same roller specifications.
How do I maintain the roller assembly? ▼
Regularly check bearing temperature and lubrication. Inspect the roller shell surface for wear patterns. Replace when grooves exceed 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.
🐟 X46Cr13 Stainless Steel
Feed Ring Die Material
- • Hardness: HRC 52-56
- • Feature: Excellent corrosion resistance for aqua feed
- • Surface Finish: Mirror-polished holes (Ra ≤ 0.8)
🪵 20CrMnTi Alloy Steel
Biomass Ring Die Material
- • 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: Tianyou 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.