Forged Rollers & Roller Shells
A roller's working surface is in constant contact with the material it carries. Surface hardness sets its wear life, and concentricity sets whether it runs quietly or hammers its own bearings.
Forged rollers carry material on a working surface induction hardened to as much as 60 HRC over a tough core. The working surface must be concentric with the bearing journals, otherwise the roller acts as an eccentric cam and cycles bearing load every revolution.
- Diameter
- 50 mm – 600 mm
- Length
- Up to 2,000 mm
- Materials
- EN8, EN9, EN19, EN31
- Surface hardness
- Up to 60 HRC
- Concentricity
- Verified to journals
Forged Rollers & Roller Shells at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Diameter 50 mm to 600 mm
- Surface hardened to 60 HRC
- Concentricity verified to bearing journals
- Lengths up to 2,000 mm
Surface Hardness and Wear Life
Rollers wear from abrasion by whatever they carry. Induction hardening the working surface to 55 HRC or above extends life several fold while keeping the core tough enough to survive shock from dropped loads.
- Hardened working surface
- Tough core for shock loads
- Concentric to bearing journals
- Ground surface finish
Concentricity to Journals
The working surface must be concentric with the bearing journals. If it is not, the roller effectively becomes an eccentric cam, cycling bearing load with every revolution and destroying bearings long before the roller itself wears out.
Roller Capability and Surface Hardness
A roller's working surface is in constant contact with whatever it carries, so surface hardness sets wear life while concentricity to the bearing journals decides whether it runs quietly or destroys its own bearings.
| Parameter | Range |
|---|---|
| Diameter | 50 mm – 600 mm |
| Length | Up to 2,000 mm |
| Materials | EN8, EN9, EN19, EN31 |
| Surface hardness | Up to ≈ 60 HRC induction hardened |
| Concentricity | Verified to bearing journals |
| Supply | Complete rollers or shells for re-lining |
Why an Eccentric Roller Destroys Bearings First
If the working surface is not concentric with the bearing journals, the roller behaves as an eccentric cam: it cycles the bearing load once per revolution, every revolution. The bearings then fail long before the roller surface has worn, and the symptom — repeated bearing failures on one roller position — is easy to misdiagnose as a bearing quality problem. Concentricity is therefore verified rather than assumed, and the working surface is hardened only at the surface so the core stays tough enough for impact from dropped loads.
People also ask
What causes conveyor rollers to fail?
Surface abrasion wearing through the hardened layer, bearing failure from eccentricity or contamination, and impact damage from dropped loads on an insufficiently tough core.
Should rollers be hardened all over?
Usually only the working surface, by induction hardening. Through-hardening would leave the roller brittle and prone to cracking under impact.
What sizes of roller do you produce?
50 mm to 600 mm diameter and up to 2,000 mm length, in EN8, EN9, EN19 and EN31.
Topics covered on this page
- roller
- roller shell
- induction hardening
- concentricity
- conveyor
- abrasive wear
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
How hard should a conveyor roller surface be?
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Up to 60 HRC induction hardened for abrasive service, with a tough core to survive impact from dropped loads.
Why does roller concentricity matter?
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An eccentric roller cycles bearing load every revolution, destroying bearings long before the roller surface wears out.
Can you supply roller shells for re-lining?
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Yes, forged shells and roll blanks for rebuilding existing roller assemblies.