Premium Back Up Rolls for Leveling Machines
Work rolls get the attention but the back up roll is the backbone of a leveling cassette. It provides the rigidity that stops the work rolls deflecting, which is why its geometry and hardness decide whether the line holds precision shift after shift.
- Geometric accuracy in the 0.005 mm class
- Surface finish around 0.2 micron
- Deep heat treatment through the roll body
- Over twenty years of production experience on this component
Key Benefits
What the back up roll controls.
Rigidity Behind The Work Roll
The back up roll provides the support that keeps work rolls straight under leveling load, which is where repeatable flatness comes from.
Wear Resistance Over Long Campaigns
Deep heat treatment and precision grinding give wear resistance that holds geometry across a long service life.
Repeatable Precision Shift After Shift
Stable roll geometry means the leveling recipe does not need re tuning every shift.
Where It Is Used
Machines that use these rolls.
- Tension leveling machines on strip lines
- Leveler cassettes in galvanizing and coating lines
- Cut to length and slitting line levelers
- Precision leveling for automotive and appliance sheet
Who It Is For
- Plants where leveling precision is a delivery requirement
- Maintenance stores holding back up roll spares
- Machine builders specifying complete roll systems
- Buyers replacing rolls that lose profile quickly
Problems It Solves
- Work roll deflection caused by worn back up rolls
- Flatness varying between shifts
- Short roll life under modern steel rolling loads
- Surface marks traced back to the support side
Technical Features
How the roll is produced.
Deep Heat Treatment
Hardness runs deep into the body rather than sitting in a thin case, so the roll survives repeat regrinding.
Precision Grinding
Rolls are ground to a 0.005 mm geometric class with surface finish around 0.2 micron.
Metallurgical Process Knowledge
The design reflects over two decades of focus on this specific component in the metallurgical industry.
Specifications
Dimensions are produced to your cassette drawing. Manufacturing data is listed below.
| Geometric Accuracy | 0.005 mm class |
|---|---|
| Surface Finish | Around 0.2 micron |
| Heat Treatment | Deep heat treatment through the roll body |
| Finishing | Precision grinding |
| Experience | Over 20 years producing this component |
| Dimensions | Made to cassette drawing |
Materials
- Alloy steel roll body
- Deep hardened working layer
- Precision ground journals
Manufacturing Process
Drawing Review
Cassette position, diameter and journal detail are confirmed from drawing or sample.
Turning
The roll body is turned with allowance for heat treatment distortion.
Deep Heat Treatment
Hardness is developed through the body for long regrind life.
Precision Grinding
Barrel and journals are ground to the 0.005 mm class and 0.2 micron finish.
Quality Control
- Hardness testing across the barrel
- Roundness and cylindricity measurement
- Surface finish verification
- Runout check on assembled journals
Customization Options
- Diameter and barrel length to your machine
- Journal and bearing seat detail to existing housings
- Hardness specification matched to your strip programme
- Matched sets per cassette
Use Guide
- Replace back up rolls as a set to keep support uniform
- Investigate the back up side when flatness drifts after a work roll change
- Regrind within the allowance stated on the drawing
- Handle and store rolls so journals are protected
How It Compares
Against lower specification back up rolls.
| Case hardened rolls with a shallow layer | Deep heat treatment supports several regrinds before the roll reaches scrap diameter. |
|---|---|
| Rolls ground to a looser geometric class | 0.005 mm class geometry and 0.2 micron finish keep work roll support even along the barrel. |
| Continuing with worn rolls | Worn back up rolls transfer deflection into the work rolls, so flatness problems return quickly after a work roll change. |
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Read MorePremium Back Up Rolls for Leveling Machines FAQ
Why does the back up roll matter so much?
It provides the rigidity and support behind the work rolls. If it is worn, work rolls deflect and flatness drifts no matter how new the work rolls are.
What accuracy do you grind to?
Geometry in the 0.005 mm class with surface finish around 0.2 micron.
Can you produce to our drawing?
Yes. Send the drawing or a sample roll and we confirm dimensions, hardness and journal detail before production.
How long do these rolls last?
Service life depends on strip material, load and tonnage. Deep heat treatment and precision grinding are what extend it, and we can advise regrind intervals for your duty.
Do you supply matching work rolls?
Yes, complete roll systems including work rolls, intermediate rolls and back up rolls are produced here.
What do you need to quote?
Roll drawing or sample, cassette model, line width, strip material and quantity per set.
Quote A Back Up Roll Set
Send your drawing or a photo of the worn roll and our engineers come back with specification and lead time.