Precision Work Rolls From 9 mm to 68 mm Diameter
Small diameter work rolls only survive heavy strip processing if the surface is hard and the set is matched. These rolls run from 9 mm to 68 mm diameter and are configured to work with chrome plated back up rolls, so contact is shared and both assemblies last longer.
- Diameter range 9 mm to 68 mm
- Electroplated chrome surface at HV 800-1000
- Configured to run with chrome plated back up rolls
- Surface roughness held to 0.1 micron class
Key Benefits
Why hardness and pairing matter at small diameters.
Abrasion Resistance At HV 800-1000
Electroplated chrome lifts surface hardness to HV 800-1000, which improves abrasion resistance and lowers the friction coefficient against the strip.
Matched Roll Set Life
Because the work rolls are configured to coordinate with chrome plated back up rolls, the service life of both assemblies is extended rather than trading one against the other.
Stable Over Long Cycles
The matched set keeps steady performance over long production cycles under continuous heavy load.
Where It Is Used
Where these diameters are used.
- Multi roll tension levelling cassettes
- Thin gauge strip levelling lines
- High precision straightening of cold rolled sheet
- Non ferrous strip processing lines
Who It Is For
- Plants running small diameter multi roll cassettes
- Maintenance stores stocking work rolls by diameter
- Machine builders assembling leveller cassettes
- Buyers replacing rolls that wear or mark the strip
Problems It Solves
- Rapid wear on small diameter work rolls
- High friction marking thin strip surfaces
- Mismatched work and back up roll wear rates
- Sourcing an intermediate diameter that is not a standard catalogue size
Technical Features
Roll specification.
Diameter Range 9-68 mm
Precision machined work rolls cover the small diameter range used in multi roll levelling cassettes.
Electroplated Chrome Surface
Chrome plating brings surface hardness to HV 800-1000 with a lower friction coefficient against the strip.
Uniform High Hardness
Hardness is distributed uniformly along the barrel so wear is even across the contact width.
Specifications
Diameters between the listed limits are produced to drawing.
| Diameter Range | 9 mm to 68 mm |
|---|---|
| Surface Hardness After Plating | HV 800-1000 |
| Surface Treatment | Electroplated hard chrome |
| Surface Roughness | 0.1 micron class |
| Matched Component | Chrome plated back up rolls |
| Duty | Continuous heavy load strip processing |
| Dimensions | Made to cassette drawing |
Materials
- Alloy steel roll body
- Electroplated hard chrome working surface
- Ground journals for cassette bearings
Manufacturing Process
Bar Selection And Turning
Bar is selected for the diameter band and turned to rough size.
Heat Treatment
The roll body is treated so the hardened surface is supported from underneath.
Grinding
The barrel is ground to the drawing geometry and roughness.
Chrome Plating
Electroplated chrome is applied and finish ground to HV 800-1000 surface condition.
Quality Control
- Surface hardness testing after plating
- Diameter and straightness inspection along the barrel
- Roughness measurement
- Set matching before packing
Customization Options
- Any diameter within 9-68 mm to drawing
- Barrel length and journal detail per cassette
- Plating thickness for your strip material
- Sets matched and marked by cassette position
Use Guide
- Always replace as a matched set with the back up rolls in mind
- Handle small diameter rolls with support, they bend easily
- Check journal fit before assembly
- Regrind before the chrome layer is worn through
How It Compares
Against the alternatives for small diameter rolls.
| Unplated hardened rolls | HV 800-1000 chrome surface resists abrasion and lowers friction, which unplated rolls cannot match at these diameters. |
|---|---|
| Standard catalogue diameters only | Any diameter across the 9-68 mm range can be produced to drawing rather than forcing a cassette redesign. |
| Replacing work rolls alone | Coordinating work rolls with chrome plated back up rolls extends the life of both assemblies. |
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Read MorePrecision Work Rolls 9-68 mm With Hard Chrome Plating FAQ
What diameters can you supply?
From 9 mm to 68 mm, produced to your cassette drawing rather than a fixed catalogue list.
What surface hardness do the rolls reach?
After electroplated chrome treatment the surface reaches HV 800-1000, which improves abrasion resistance and lowers friction.
Should we change the back up rolls at the same time?
The set is designed to run together, so replacing both keeps wear balanced and extends the life of the whole assembly.
How smooth is the roll surface?
Surface roughness is held in the 0.1 micron class after finish grinding, which protects thin strip finish.
Can you match rolls from a competitor cassette?
Yes. Send a sample roll or the drawing with the cassette model and we produce an equivalent.
What do you need for a quote?
Diameter, barrel length, journal detail, quantity per set and annual usage.
Order Work Rolls By Diameter
Send the diameter and cassette drawing and we quote a matched roll set with plating specification.