Roll Bearing: Clearance C2-C5 (ISO)

Component Specifications

Definition

A roll bearing is a specialized anti-friction bearing designed to support radial and axial loads on rotating shafts in industrial roll applications. It consists of inner and outer rings with rolling elements (balls or rollers) separated by a cage, enabling smooth rotation with minimal energy loss through optimized contact mechanics and lubrication systems.

Working Principle

Roll bearings operate on the principle of replacing sliding friction with rolling friction. Rolling elements (balls, cylindrical rollers, or tapered rollers) circulate between inner and outer raceways, distributing loads evenly while maintaining precise shaft alignment. Lubrication reduces metal-to-metal contact, while cage separation prevents element collision and ensures uniform load distribution.

Materials

High-carbon chromium steel (AISI 52100/SUJ2), case-hardened steel, stainless steel (AISI 440C), ceramic (silicon nitride), or polymer composites. Rings and rolling elements typically use through-hardened or case-hardened steel with hardness 58-65 HRC.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Sealing	Contact/non-contact seals, shields
Clearance	C2-C5 (ISO)
Speed Rating	Up to 15,000 rpm (grease), 20,000 rpm (oil)
Load Capacity	Dynamic: 15-200 kN, Static: 10-150 kN
Precision Class	ABEC 1-9 (ISO P0-P2)
Temperature Range	-30°C to +150°C (standard), up to +350°C (special)

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 15, ISO 355, DIN 625, DIN 5412

Parent Products

This component is used in the following industrial products

Lower Roll Bank

The lower set of rolls in a straightener/leveler machine that provides the foundational support and pressure for material flattening operations.

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Engineering Analysis

Risks & Mitigation

Fatigue spalling
Corrosion damage
Contamination ingress
Lubrication failure
Thermal overload
Electrical pitting

FMEA Triads

Trigger: Inadequate lubrication
Failure: Increased friction leading to overheating and seizure
Mitigation: Implement automated lubrication systems with condition monitoring

Trigger: Contamination from process environment
Failure: Abrasive wear and surface damage
Mitigation: Use sealed bearing units with appropriate IP ratings

Trigger: Misalignment during installation
Failure: Uneven load distribution causing premature fatigue
Mitigation: Use precision alignment tools and follow installation procedures

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 492:2014 Class Normal/P6/P5, Radial runout ≤0.005mm

Test Method

Vibration analysis per ISO 15242, fatigue testing per ISO 281, dimensional verification per ISO 1132

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Manufacturers of Roll Bearing

Manufacturer profiles associated with Roll Bearing.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Seal Groove

Precision-machined groove in aluminum bearing housings designed to accommodate sealing elements for fluid containment and contamination prevention.

Frequently Asked Questions

What is the difference between roll bearings and plain bearings?

Roll bearings use rolling elements (balls/rollers) to reduce friction, offering lower starting torque and higher precision, while plain bearings use sliding surfaces with lubrication films, better for high-load/low-speed applications.

How often should roll bearings be lubricated?

Lubrication intervals depend on operating conditions: typically 3-12 months for grease-lubricated bearings in moderate environments, with continuous oil systems for high-speed applications.

What causes premature roll bearing failure?

Common causes include improper installation (25%), contamination (40%), inadequate lubrication (35%), misalignment, and overload beyond rated capacity.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Roll Bearing