N28 Series Cylindrical Roller Wheels for Metallurgical Conveyor Chains
Conveyor chains inside metallurgical lines run under heavy load in dust, heat and scale. The N28 roller wheel is through hardened rather than case hardened so the whole section carries load, and the running surface is precision ground for smooth travel and long life.
- Load capacity up to 28 kN
- Through hardened bearing steel
- Precision ground cylindrical running surface
- Surface roughness around 0.8 micron
Key Benefits
What the roller specification changes.
Reliable Under High Load
Rated to 28 kN, the roller keeps working under the extreme mechanical loads of metallurgical conveying systems.
Smooth Travel
Advanced grinding produces an ultra smooth running surface, which lowers drag and chain wear.
Long Service Life
Through hardened material with a ground surface extends life significantly in challenging environments.
Where It Is Used
Where they run.
- Conveyor chain systems in metallurgical processing lines
- Furnace and heat treatment line conveyors
- Heavy load transfer conveyors
- Chain systems exposed to dust and scale
Who It Is For
- Plants maintaining conveyor chain systems
- Chain manufacturers sourcing roller wheels
- Maintenance teams replacing worn rollers
- Buyers needing a standard N28 equivalent
Problems It Solves
- Roller wear in dusty and hot conveyor environments
- Chain drag rising as rollers deteriorate
- Deformation of rollers under high load
- Inconsistent roller dimensions in replacement batches
Technical Features
Roller construction.
Through Hardened Bearing Steel
Material is hardened through the section rather than only at the surface, which resists deformation under 28 kN class loads.
Precision Ground Surface
Advanced grinding technology gives an ultra smooth cylindrical running surface at around 0.8 micron.
Dimensional Consistency
Manufacturing tolerance in the 0.05 mm class keeps rollers interchangeable across a chain.
Specifications
Dimensions follow the N28 series. Reference sizes are listed below.
| Series | N28 cylindrical roller wheel |
|---|---|
| Load Capacity | Up to 28 kN |
| Material | Through hardened bearing steel |
| Surface Roughness | Around 0.8 micron |
| Dimensional Tolerance | 0.05 mm class |
| Reference Dimensions | Diameter around 41.75 mm, length reference up to 175 mm depending on variant |
| Application | Metallurgical production conveying systems |
Materials
- Through hardened bearing steel
- Precision ground running surface
- Bore machined to chain pin fit
Manufacturing Process
Dimension Confirmation
Roller diameter, length and bore are confirmed against your chain.
Turning
Blanks are turned close to size with grinding allowance.
Through Hardening
Heat treatment hardens the full section for load capacity.
Precision Grinding
The running surface and bore are ground to tolerance and finish.
Quality Control
- Hardness testing through the section
- Diameter and bore inspection
- Surface roughness verification
- Batch consistency check
Customization Options
- Roller dimensions to your chain design
- Bore and fit for the chain pin
- Surface specification for hot or dusty environments
- Batch quantities for a full chain replacement
Use Guide
- Replace rollers in complete sections rather than individually
- Check chain pin wear at the same time
- Confirm bore fit before assembly
- Monitor chain drag as an indicator of roller condition
How It Compares
Against alternative roller specifications.
| Case hardened rollers | Through hardening resists deformation under sustained high load instead of relying on a surface case. |
|---|---|
| Turned but unground rollers | A precision ground surface at around 0.8 micron lowers drag and chain wear. |
| Mixed batch sourcing | Tolerance in the 0.05 mm class keeps rollers interchangeable along the whole chain. |
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Read MoreN28 Series Cylindrical Roller Wheels for Conveyor Chains FAQ
What load can the roller carry?
Load capacity is up to 28 kN, which is what the N28 designation refers to.
What material is used?
Through hardened bearing steel, so hardness runs through the section rather than sitting in a thin case.
Can you match our chain dimensions?
Yes. Send roller diameter, length and bore, or a sample roller, and we produce to those dimensions.
How smooth is the running surface?
Precision ground to around 0.8 micron, which is what keeps travel smooth and chain wear low.
Do you supply full chain quantities?
Yes, rollers can be supplied in batch quantities for a complete chain replacement.
What do you need to quote?
Roller dimensions or sample, chain type, operating temperature and quantity required.
Replace Your Conveyor Chain Rollers
Send roller dimensions or a sample and we quote batch supply with hardness records.