Backup Roll Bearings for Rolling Mills

Requirements

Backup Roll Bearing Requirements

Very High Radial Load Capacity

Backup roll bearings support the rolling force transmitted from the work rolls and must carry very high radial loads over long operating cycles.

High Rigidity & Low Deflection

Strong radial rigidity and controlled elastic deformation help maintain roll-system stability, strip shape and thickness accuracy.

Large Size & Roll Neck Fit

Backup roll positions commonly use large bearings and require reliable matching with roll necks, chocks and adjacent components.

Reliable Continuous Operation

Steel and non-ferrous rolling lines often operate continuously with high utilization and limited maintenance windows.

Lubrication, Sealing & Contamination Control

Water, scale, particles and degraded lubricant can reduce bearing life, especially in hot rolling and plate mill environments.

Products

Recommended Rolling Elements

Four-Row Cylindrical Roller Bearings
Primary high-radial-load solution for many backup roll and roll neck positions; separable design supports mounting, inspection and maintenance.
Backing Bearings
Support-roll solution for cluster, Sendzimir, foil and precision cold rolling mills requiring high rigidity and accurate outer diameter.
Four-Row Tapered Roller Bearings
Combined radial and axial load support for backup roll positions requiring integrated axial location and robust roll guidance.
Double Row Cylindrical Roller Bearings
Compact, high-rigidity support for intermediate or support-roll positions with limited mounting space.
Spherical Roller Bearings
Self-aligning support for auxiliary backup roll or mill positions where shaft deflection and mounting misalignment must be accommodated.

Selection

Selection Information

Information Customers Can Provide

Rolling mill type and mill stand
Backup roll arrangement and bearing position
Existing bearing brand and number
Roll neck dimensions and ID / OD / width
Radial load, axial load and load spectrum
Speed and operating cycle
Required rigidity, clearance or runout
Operating temperature and cooling conditions
Lubrication, filtration and sealing method
Quantity
2D / 3D drawing or equipment photo

CHG Assessable Content

Suitable bearing type and internal structure
Size and adjacent mounting arrangement
Radial rigidity and load distribution direction
Material and heat treatment direction
Precision class, internal clearance or preload
Cage, sealing and lubrication requirements
Speed and heat-generation considerations
Roll neck and chock fit review
Replacement compatibility
Inspection documents and delivery proposal

ADVANTAGES

Why Choose CHG

Large Size Capability

Rolling mill bearings with bore diameter from 100mm to 1600mm for large backup roll, roll neck and plate mill applications.

Heavy-Load Application Review

Solutions evaluated according to mill type, backup roll arrangement, load spectrum, rigidity, roll neck dimensions, speed and lubrication.

Custom Manufacturing

Custom support by bearing number, drawing, roll neck dimensions, clearance, precision, sample information or replacement needs.

Quality & Inspection Support

Material certificates, dimensional inspection, hardness and heat-treatment records, product photos and packing photos can be provided according to order requirements.

Bearings for Hot Rolling Mills

Backup roll and roll neck solutions for heat, cooling water, scale, impact and heavy rolling loads.

Bearings for Cold Rolling Mills

Backup roll and backing bearing solutions focused on rigidity, low deflection, precision and clean lubrication.

Work Roll Bearings

Bearing solutions for the work roll position transmitting rolling force to the backup roll system.

Roll Neck Bearings

Selection and replacement support based on roll neck dimensions, fits, bearing arrangement and lubrication.

Roll System Bearing Solutions
Complete review of work roll, backup roll, intermediate roll, roll neck and axial support arrangements.

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FAQ

Backup Roll Bearings for Rolling Mills FAQ

Please provide the mill type, mill stand, backup roll arrangement, bearing number, roll neck dimensions, radial and axial loads, load spectrum, speed, rigidity requirement, lubrication, quantity and drawing if available.

Four-row cylindrical roller bearings are widely used for high radial loads. Four-row tapered roller bearings may be selected when combined radial and axial load support is required. Backing bearings are commonly used in cluster and Sendzimir mills.

Rigidity depends on bearing structure, roller and raceway geometry, internal clearance or preload, fits, roll neck dimensions, chock stiffness and load distribution. The complete arrangement should be reviewed together.

The bore diameter range is generally from 100mm to 1600mm. Extra-large and custom dimensions can be reviewed according to drawings and application requirements.

Yes. Please send the original brand, bearing number, dimensions, clearance or precision requirement, drawing and operating information for compatibility review.

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