Pellet Mill Roller Assemblies

Pellet Mill Roller Assemblies from Anhui Jindingsheng Machinery Co., Ltd. are complete rotating units built around a forged roller shell, precision shaft, bearing set and retaining components, matched to work with a corresponding ring die inside a pellet mill. Each assembly is produced through a controlled sequence of forging, machining, carburizing, quenching and grinding, so the roller shell surface reaches a stable working hardness while the core retains toughness for repeated load cycles. Bore diameter, keyway position, shell width and outer contour are machined to the tolerance range required for direct installation without additional on site fitting. The company covers raw material selection, forging, heat treatment, finish grinding and dynamic balancing within one facility in Guangde City, Anhui Province, allowing dimensional and hardness data to be tracked from batch to batch. Assemblies are supplied for feed pellet production, wood and biomass pellet production and related granulation processes, and are exported to markets including the United States, Japan, South Korea, Vietnam, France, Bangladesh, Russia, India, the Philippines and countries across Europe.

200mm to 600mm Roller Shell Diameter Range

HRC58 to HRC62 Working Surface Hardness

H7 Fit Class Bore and Shaft Tolerance

G6.3 Grade Dynamic Balance Standard

Core Advantages

Controlled Heat Treatment Depth

Carburizing and quenching depth on each roller shell is held within a set range so the hardened layer supports repeated contact with pellet mash without breaking through to the softer core during normal service intervals.

Matched Shaft and Bearing Fit

Shaft diameters and bearing seats are ground to H7 class tolerance, reducing radial play at the roller shell and limiting uneven wear across the working face during continuous operation.

Dynamic Balance Verification

Assembled rollers are checked against G6.3 balance grade before dispatch, lowering vibration transmitted to the main shaft and bearing housing of the pellet mill at working speed.

Traceable Batch Records

Forging batch, heat treatment parameters and final dimensional inspection results are recorded for each production run, supporting comparison between assemblies used on the same mill.

Dimension Sets Built for Direct Fitting

Bore diameter, keyway width and shell width are machined to the specification sheet supplied at order confirmation, reducing the need for on site rework before installation.

Product Features

Roller Shell Diameter	200mm to 600mm, produced to drawing
Roller Shell Width	50mm to 220mm, produced to drawing
Bore and Shaft Tolerance	H7 fit class
Working Surface Hardness	HRC58 to HRC62
Core Hardness	HRC30 to HRC40
Hardened Layer Depth	1.5mm to 3.5mm
Dynamic Balance Grade	G6.3
Bearing Type	Deep groove ball bearing or tapered roller bearing, selected per assembly drawing
Surface Finish Option	Ground finish or chrome plated finish
Standard Packaging	Anti rust coating, wooden case, export marking

Assembly Components

Roller ShellForged and machined outer ring that contacts the ring die inner surface and compresses material into pellets, available in smooth, corrugated or grooved patterns.

Roller ShaftGround shaft supporting the roller shell, machined with a keyway and bearing seat sized to the H7 tolerance band listed in the drawing.

Bearing SetSealed or open bearing selected according to running speed and radial load, mounted between the shaft and the roller shell hub.

Roller Hub or SleeveConnecting sleeve between shaft and roller shell, machined to transfer torque while allowing the shell to be replaced without discarding the shaft.

Retaining Ring and SealAxial retaining hardware and seal set that keep the bearing in position and limit ingress of dust and fine material during operation.

Fastening HardwareNuts, washers and locking components sized to the assembly drawing, supplied as part of the complete roller assembly set.

Material and Hardness Options

20CrMnTi Alloy Steel	Carburized and quenched, general purpose feed pellet production
20CrMo Alloy Steel	Carburized and quenched, suited to mixed grain and feed formulas
Cr12MoV Tool Steel	Through hardened, suited to abrasive biomass and wood pellet material
Chrome Plated Option	Applied over the base material for reduced surface adhesion in high moisture material

Application Scenarios

Feed Pellet Production

Roller assemblies for livestock, poultry and aquaculture feed lines, matched to ring die hole diameter and formula density.

Wood and Biomass Pellet Production

Assemblies built with higher wear resistant materials for sawdust, straw and other fibrous biomass feedstock.

Organic Fertilizer Granulation

Corrugated or grooved shell options for fertilizer feedstock with variable moisture content.

Replacement for Existing Mill Fleets

Assemblies machined to match existing shaft, bore and keyway dimensions for mills already in service.

Compatibility and Customization

Bore diameter, keyway width, shell width and outer diameter machined to a customer supplied drawing or sample assembly
Shell surface pattern produced as smooth, corrugated or grooved, matched to the feedstock and ring die combination in use
Bearing type and seal configuration selected according to running speed, ambient dust level and maintenance interval
Shaft length and hub configuration adjusted to fit mill housings from different manufacturers
Sample based production available before larger order confirmation
Private label marking and export packaging arranged on request

Maintenance and Inspection Guidance

Check radial and axial play at the bearing seat at scheduled intervals and record the measured clearance
Inspect the roller shell working surface for uneven wear patterns that indicate misalignment with the ring die
Confirm lubrication points are serviced according to the bearing manufacturer recommendation before extended production runs
Store spare roller assemblies in the supplied anti rust packaging in a dry area until installation
Replace retaining rings and seals when clearance or leakage exceeds the tolerance stated in the assembly drawing
Record installation date and running hours for each assembly to support wear trend comparison across the mill fleet

Frequently Asked Questions

What information is needed to machine a compatible roller assembly

A drawing or a physical sample showing bore diameter, keyway position, shell width, outer diameter and shaft length allows the assembly to be machined to fit an existing pellet mill without additional adjustment.

Can roller assemblies be supplied for mills from different manufacturers

Assemblies are machined to the dimensions submitted at order confirmation, so units can be produced to match shaft and housing dimensions used across different mill brands and models.

What causes uneven wear on a roller shell surface

Uneven wear typically results from misalignment between the roller and ring die, incorrect bearing clearance or a shell material not matched to the abrasiveness of the feedstock being processed.

Is sample based production available before placing a full order

Sample based production is available so dimensions and fit can be confirmed on the customer mill before a larger order quantity is placed.

How are assemblies packaged for export shipment

Assemblies are coated with anti rust protection, packed in wooden cases suited to sea or air freight, and marked according to the destination country requirements confirmed at order stage.

Anhui Jindingsheng Machinery Co., Ltd.

Anhui Jindingsheng Machinery Co., Ltd., located in the North District of Guangde City Economic Development Zone, Anhui Province, was established in 2022. The company covers an area of 14,509 square meters and has 97 employees. We are Custom Pellet Mill Roller Assemblies Supplier and China Pellet Mill Roller Assemblies Company, With advanced technology and manufacturing technology at home and abroad, it is at the world's leading level, and is an enterprise that pursues greatness and innovation.
The company focuses on the core business of R&D and manufacturing of granulator ring die, rollers, and related granulator parts services. The main product types are ring die, roller, and granulator accessories. It has the most advanced equipment and more complete service enterprise in China. The company's products are exported to many foreign countries: The United States, Japan, South Korea, Vietnam, France, Bangladesh, Russia, India, the Philippines, and European countries. The company strictly controls all processes from raw materials to forging, finishing, and heat treatment. It is the one-stop service center company in China.
Anhui Jindingsheng Machinery Co., Ltd., in line with the production concept of "refinement", uses stable and reliable quality to create your long-term development.
Friends from all walks of life are welcome to visit, guide, and negotiate business.

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