Heavy Duty Roller Assemblies

Heavy Duty Roller Assemblies from Anhui Jindingsheng Machinery Co., Ltd. are built for pellet mills running large shaft diameters, extended duty cycles and higher radial load than a standard assembly is rated for. Each unit combines a thick section forged roller shell, an oversized shaft, a double row bearing arrangement and a reinforced hub, sized to carry continuous production loads found in large scale wood, biomass and industrial waste pelletizing lines. Forging, carburizing, quenching and grinding are carried out within one facility in Guangde City, Anhui Province, with hardened case depth increased relative to standard duty roller assemblies to support longer intervals between shell replacement. Shaft and bearing seat dimensions are ground to a controlled tolerance band so radial play stays within the range needed for stable operation at full mill load. Assemblies are produced to a customer drawing or sample and are exported to markets including the United States, Japan, South Korea, Vietnam, France, Bangladesh, Russia, India, the Philippines and countries across Europe.

300mm to 800mm Shell Diameter

60mm to 150mm Shaft Diameter

HRC58 to HRC64 Surface Hardness

Continuous 24 hour Duty Rating

Core Advantages

Oversized Shaft and Bearing Seat

Shaft diameter and bearing seat dimensions are increased relative to standard duty assemblies, reducing deflection under continuous full load operation.

Double Row Bearing Arrangement

Double row tapered roller or spherical roller bearings distribute radial and axial load across a wider contact area than a single row arrangement.

Extended Hardened Case Depth

Carburizing and quenching depth is increased on the roller shell working surface, extending the interval before the hardened layer wears through.

Reinforced Hub and Housing Fit

Hub wall thickness and housing fit tolerance are set for stable torque transfer under repeated start stop cycles in continuous production.

Batch Level Inspection Records

Forging batch, heat treatment parameters and final dimensional data are recorded and can be referenced against later wear observations.

Drawing Based Export Production

Assemblies are machined to a submitted drawing or sample and packed for sea or air freight to overseas mill operators.

Standard Duty Compared to Heavy Duty

Radial Load Rating	Standard Duty range	Heavy Duty range, higher rated
Shaft Diameter	40mm to 90mm	60mm to 150mm
Bearing Arrangement	Single row bearing	Double row bearing
Hardened Case Depth	1.5mm to 3.5mm	3mm to 6mm
Rated Duty Cycle	Standard shift operation	Continuous 24 hour operation

Figures are provided as a reference range for selecting between assembly classes and should be confirmed against the specific mill and feedstock in use

Product Features

Roller Shell Diameter	300mm to 800mm, produced to drawing
Shaft Diameter	60mm to 150mm, produced to drawing
Bore and Shaft Tolerance	H7 fit class
Working Surface Hardness	HRC58 to HRC64
Core Hardness	HRC32 to HRC42
Hardened Layer Depth	3mm to 6mm
Dynamic Balance Grade	G6.3
Bearing Type	Double row tapered roller bearing or spherical roller bearing
Rated Duty Cycle	Continuous 24 hour operation
Standard Packaging	Anti rust coating, steel frame or wooden case, export marking

Assembly Components

Reinforced Roller Shell

Thick section forged shell carrying the working surface that contacts the ring die under continuous load.

Oversized Shaft

Ground shaft with an enlarged diameter and keyway sized for higher torque transfer at the bearing seat.

Double Row Bearing Set

Bearing arrangement selected to carry combined radial and axial load at rated continuous duty.

Reinforced Hub

Thicker wall hub connecting shaft and shell, machined for a controlled interference or key drive fit.

Retaining Ring and Seal Set

Axial retaining hardware and sealing components rated for extended service under continuous operation.

Fastening Hardware

Nuts, washers and locking components sized to the load rating of the complete assembly.

Material and Hardness Options

20CrMnTi Alloy Steel	Carburized and quenched, general heavy duty pellet production
20CrNiMo Alloy Steel	Carburized and quenched, suited to combined high load and impact conditions
Cr12MoV Tool Steel	Through hardened, suited to abrasive biomass and industrial waste feedstock
Chrome Plated Option	Applied over the base material for reduced surface adhesion in high moisture material

Application Scenarios

Large Scale Wood Pellet Plants

Assemblies rated for continuous shift operation processing sawdust and wood chip feedstock.

Industrial Waste and Biomass Pelletizing

Reinforced shaft and shell combination suited to abrasive and mixed density feedstock.

High Throughput Feed Mills

Higher radial load rating suited to mills running extended daily production hours.

Fleet Standardization Programs

Assemblies machined to a common drawing across multiple mills operating the same production line.

Compatibility and Customization

Shaft diameter, keyway width, shell width and outer diameter machined to a customer supplied drawing or sample assembly

Bearing type and seal configuration selected according to duty cycle, ambient dust level and maintenance interval

Hub configuration adjusted to fit mill housings from different manufacturers

Shell surface pattern produced as smooth, corrugated or grooved, matched to feedstock density

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 on a fixed schedule and record the measured clearance against the previous inspection
Inspect the roller shell working surface for wear patterns that indicate misalignment with the ring die or uneven feedstock distribution
Confirm lubrication points are serviced according to the bearing manufacturer recommendation before extended continuous runs
Store spare assemblies in the supplied anti rust packaging in a dry area until installation
Replace retaining rings and seals once 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 separates a heavy duty roller assembly from a standard duty assembly

The shaft diameter, bearing arrangement, hub wall thickness and hardened case depth are all increased relative to a standard duty assembly, allowing the unit to carry higher radial load across a longer continuous duty cycle.

What information is needed to machine a compatible heavy duty assembly

A drawing or physical sample showing shaft diameter, keyway position, shell width, outer diameter and bearing seat dimensions allows the assembly to be machined for direct fitting into an existing mill housing.

Can these assemblies be used on mills originally fitted with standard duty rollers

This depends on the housing and shaft seat dimensions of the mill in question, since a heavy duty assembly generally requires a larger shaft diameter and bearing seat than a standard duty assembly.

Is sample based production available before placing a full order

Sample based production is available so fit and dimensions 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 a steel frame or wooden case 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 Heavy Duty Roller Assemblies Supplier and China Heavy Duty 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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