Jiangsu, China
Business Type:
Manufacturer/Factory & Trading Company
Number of Employees:
Year of Establishment:
Management System Certification:
ISO 9001
Average Lead Time:
Peak season lead time: 1-3 months
Off season lead time: 1-3 months
OEM/ODM Service

Pellet Mill Die, Die, Pellet Mill Dies manufacturer / supplier in China, offering Stainless Steel Ring Die for Wood Pellet Mill, CE Certification Shrimp Pellet Feed Machinery, Factory Supply Shrimp Feed Pelletizer/Floating Fish Feed Pellet Making Machine and so on.

Gold Member Since 2009
Audited Supplier

Stainless Steel Ring Die for Wood Pellet Mill

Get Latest Price
Min. Order / Reference FOB Price
1 Piece US $1-600/ Piece
Port: Shanghai, China
Production Capacity: 100
Payment Terms: L/C, T/T
Type: Ring Die
Voltage: 380V
Automatic Grade: Automatic
Controlling Mode: CNC
Energy Saving: Energy Saving
Certification: CE, ISO

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Basic Info

Model NO.: FDSP
Warranty: 1 Year
Customized: Customized
Condition: New
Die: Pellet Mill Die
Trademark: Liangyou
Transport Package: Iron Case
Specification: CE, ISO, SGS
Origin: Jiangsu China
HS Code: 8436990000

Product Description

 High Quality Customized Stainless Steel Die
Stainless Steel Ring Die for Wood Pellet Mill

Good tensile strength, Good abrasion resistance, Good corrosion resistance, Good impact resistance, Good heat resistance, Good fatigue resistance.


Ring die for pellet machine in poultry feed, livestock feed, aqua feed, bio-mass pellet machine, etc.

Features of Our Ring Die:

1. Made of imported high-carbon high-chromium stainless billet steel, optimization 
carbon, thus enhancing wearing and corrosion resistance and hardness.

2. It can deal with all kinds of die hole over &1.2mm (&1.2mm included) and compression ratio.

3. Ring die can be produced up to 300mm-1500mm in diameter  and 500mm in height.

4. In ring die processing, full automatic control, one-time molding for die hole, high

Features of Our Production Process:

1. Material refining technology, fewer impurities, high purity, largely reducing harmful 
elements content(such as elements S,P ), thus comprehensive mechanical performance
of material is raised.

2. Through roll forging, material is processed and strengthened and material fibre is 
complete and uniform, which increases integrated mechanical performance of material.

3. FDSP Company has the world advanced forging equipment and technology, electronic
data processing systems and perfect quality control system.

4. Ring die blank, generally chromiumalloy roll forgings, some factories use 45 ordinary
carbon steel.

5. Hardness of blank must be controlled, ranging from HB170 to HB220. If the hardness 
is too high, the drill is easy to break and happens with die hole when drilling. If hardness 
is too low, the surface finish of die hole will be not good.

6. In order to control blank inner material uniformity, every blank must be carried out with
fault detection, which can avoid defects such as flaw, pore-free, crackle and inclusions 

7. After machining and heat treatment process, hardness of ring die can be up to HRC 
52-58(inner diameter less than 350mm), HRC50-56(inner diameter more than 350mm), more wearable and anti-corrosion.

8. In order to control hardness uniformity of ring die after heat treatment, we choose more
than three points in each part of trisection of peripheral direction to test hardness and 
take average. The difference of hardness value between each part should not be higher 
than HRC4.

9. According to the principle of metal material science combined with gas quenching and 
C, Cr, Mn, Ni, V elements content is optimized, forming the standard of ring die.

Relations Between Die Hole Structure and Pelleting:

Straight hole and release stepped hole is suitable for compound feed processing

External conical hole suitable for the processing of high-fibre feed like de-fat chaff

Internal conical hole and compression-type stepped hole applicable for the process of herbage powder feed of light proportion

We should try to avoid using release stepped hole(pressure-relief vent)

Because discharing is not easy for holes in the rows of the edge of ring die, pressure-relief vent is designed there.


Production process:

1. Precision Machining:

CNC machining center

CNC machining center assure high dimensional accuracy,geometric tolerance and 
surface roughness.

2.Hole Machining

Germany gun drill

Good quality gun drill equipment, tools and drilling hole software:

1. Die hole position high accuracy, up to 15 seconds per circle. High accuracy of position
ensures both high dimensional accuracy and uniformity of materials and uniformity in die wearing and forces of radial direction and peripheral direction.

2. High rotating speed and imported tools and cooling liquid ensures process conditions 
as drilling required. Thanks to such conditions, the processed die hole features small 
roughness, Ra 0.8 and smoothness, which can ensure pelleting output, quality and 
debugging convenience.

3. The application of drilling hole software is favorable to increase porosity of ring die and
optimize its way of aperture and therefore pelleting output, quality and service life of die isguaranteed.

3. Vacuum Hardening


America vacuum furnace:

1. High vacuum degree, no oxidation reaction in ring die surface, ensuring original 
smoothness of die hole inner surface.

2. High vacuum degree, twisting bottom and convection heating minimize ring die 

3. CNC controls process program, ensuring ring die quality stability.

4. With rationally adjusting heat treatment, heat preservation and cooling rate and time, 
microstructure of ring die can achieve its most suitable working conditions.

5. High cooling speed ensures more even distribution of carbide and hardenability and 
uniformity of ring die is guaranteed, contributing to balance using of ring die.

Production flow
Stainless Steel Ring Die for Wood Pellet Mill




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