Eccentric Shaft – Roller Shaft

Function of the Eccentric Shaft – Roller Shaft

The roller shaft / eccentric shaft is a critical component in the roller assembly of ring-die pellet mills. Its main functions are to support, position, and transmit motion to the pellet mill roller, while also enabling adjustment of the working clearance between the roller and the pellet die. Thanks to its eccentric design, the shaft allows precise adjustment of the pressing force to suit different raw materials, helping maintain stable compression, ensure uniform material compaction through the die holes, and improve pellet quality and pelleting efficiency.

In addition, the eccentric shaft helps reduce vibration, distribute loads evenly, and minimize wear on both the roller and the pellet die. This contributes to stable, reliable operation of the pelleting system and extends the service life of key working components in animal feed and aquaculture feed pellet mills.

A high-quality eccentric shaft also plays an essential role in maintaining consistent pelleting performance and ensuring durable, long-term operation of ring-die pellet mills. Therefore, selecting a reputable manufacturer or machining supplier for eccentric shafts is a top priority.

Eccentric Shaft Machining at Tien Phat Mechanical

Machining of the eccentric shaft is a critical technical process within the roller assembly of ring-die pellet mills. The eccentric shaft plays a key role in supporting and positioning the pellet mill roller, while also adjusting the working clearance and pressing force between the roller and the pellet die. The quality of the eccentric shaft directly affects pressing force stability, pellet quality, die wear, and the service life of the roller assembly. With more than 20 years of experience, Tien Phat Mechanical has in-depth expertise in material properties, working loads, eccentric mechanisms, and the harsh operating conditions of animal feed and aquaculture feed processing machinery. High-quality steel blanks are carefully selected for their high load-bearing capacity and excellent wear resistance, making them suitable for continuous operation under high pressure in pellet mills.

At Tien Phat Mechanical, eccentric shafts are precisely machined using modern CNC systems, ensuring full compliance with technical designs, high concentricity of mating surfaces, accurate eccentric offset, and excellent shaft straightness. This precision enables stable roller operation and accurate adjustment of pressing force. Shaft surfaces are finished to a high degree of smoothness, ensuring precise assembly with rollers, bushings, and bearings. The products undergo controlled heat treatment to enhance hardness and optimize mechanical properties, improving load-bearing capacity, wear resistance, and significantly extending the service life of the eccentric shaft.

In addition, a strict quality control system is applied throughout the entire production process, including inspection of overall dimensions, eccentricity accuracy, concentricity, surface roughness, hardness, and other critical technical parameters. With the support of advanced measuring and testing equipment, every eccentric shaft leaving the factory meets technical requirements and delivers stable, durable performance over long-term operation.

Eccentric shaft products from Tien Phat Mechanical are compatible with most ring-die pellet mill brands on the market and are widely used in industries such as animal feed production, aquaculture feed processing, wood pellet manufacturing, fertilizer production, and many other industrial applications.

Technical Specifications

• Material: Alloy Steel

• Hardness: 54–56 HRC

• Heat Treatment: Vacuum heat treatment

• Types: Customized based on machine models and customer requirements

Ordering & Delivery

Optimized processes to minimize customer downtime:

• Quotation: Detailed response within 24 working hours

• Manufacturing Lead Time: 15-20 days, depending on Extruder Machine Shaft type and raw material
  (urgent orders can be expedited)

• Shipping:

  • Domestic: Door-to-door delivery within 2–5 days, depending on location

  • Export: Support for various Incoterms (FOB, CIF, CIP, DDP, etc.) upon request

• Packaging: Rust-preventive oil coating, shrink wrapping, and sealed wooden crates compliant with export standards

Technical Support

Remote online technical support or on-site assistance at the customer’s factory, depending on requirements.

Commitment

With a team of experienced and professional engineers and technicians, Tien Phat ensures finished products with high precision that fully meet technical requirements and respond quickly to customer needs.

We place trust and reliability at the core of our operations and are committed to completing all orders on time while maintaining the highest quality standards. In the event of equipment issues, we pledge to provide prompt solutions and timely support to minimize downtime and losses for our customers.

Contact Information

Tien Phat Trading & Service Mechanical Company Limited

• Head Office: 237A National Highway 1K, Linh Xuan Ward, Ho Chi Minh City, Vietnam
• Branch Factory: No. 3, Cay Tram Residential Area, Tan Khanh Ward, Ho Chi Minh City, Vietnam
• Website: https://cokhitienphat.com
• Email: cokhitienphat@gmail.com
• Phone: (+84) 937 059 288
• Facebook: facebook.com/cokhitienphat