Ball Bearings (for ball screws): Bore Diameter 6-100 mm

Component Specifications

Definition

Ball bearings designed for integration into ball screw or lead screw systems, which convert rotational motion into precise linear motion. These bearings support the screw shaft, handle axial and radial loads, and maintain alignment under operational stresses. They feature precision-ground races and high-grade balls to ensure minimal backlash, high rigidity, and extended service life in demanding industrial applications.

Working Principle

Operates on the principle of rolling contact between precision balls and hardened raceways. When the screw rotates, the balls circulate within the bearing, reducing sliding friction to near-zero levels. This allows efficient transmission of motion and force with high accuracy and repeatability, while distributing loads evenly to prevent localized wear.

Materials

Typically made from chrome steel (AISI 52100 or equivalent) for races and balls, with optional stainless steel (AISI 440C) for corrosion resistance. Cages may be constructed from pressed steel, brass, or engineered polymers (e.g., polyamide). Seals are often nitrile rubber or fluorocarbon for contamination protection.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Width	6-47 mm
Clearance	C0 to C3 (normal to loose)
Speed Limit	Up to 20,000 rpm
Bore Diameter	6-100 mm
Outer Diameter	19-215 mm
Precision Grade	ABEC 3 to ABEC 7 (ISO P0 to P4)
Static Load Rating	2.5-75 kN
Dynamic Load Rating	5-150 kN
Operating Temperature	-30°C to +120°C

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 492, DIN 625-1, DIN 5412

Parent Products

This component is used in the following industrial products

Ball Screw or Lead Screw

A mechanical linear actuator that converts rotational motion to precise linear motion with minimal friction.

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Engineering Analysis

Risks & Mitigation

Contamination from dust or debris leading to premature wear
Improper installation causing misalignment and vibration
Inadequate lubrication resulting in overheating and seizure
Overloading beyond dynamic rating causing fatigue failure

FMEA Triads

Trigger: Contaminant ingress due to damaged seals
Failure: Increased friction, pitting on raceways, noise, and eventual bearing lockup
Mitigation: Use sealed or shielded bearings, implement regular cleaning protocols, and operate in controlled environments

Trigger: Excessive preload during installation
Failure: Elevated operating temperatures, reduced lifespan, and potential cracking of races
Mitigation: Follow manufacturer torque specifications, use precision mounting tools, and verify alignment with dial indicators

Trigger: Corrosion from exposure to moisture or chemicals
Failure: Surface degradation, increased clearance, and loss of precision
Mitigation: Select stainless steel or coated bearings, apply corrosion inhibitors, and ensure proper storage conditions

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Radial runout ≤ 0.005 mm, axial play ≤ 0.002 mm per ABEC 5 standards; meets ISO 492 Class 6 for dimensional accuracy

Test Method

Vibration analysis per ISO 15242, load testing per ISO 76, endurance testing under simulated operational conditions, and coordinate measuring machine (CMM) verification of geometry

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

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CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Ball Bearings (for ball screws)

Manufacturer profiles associated with Ball Bearings (for ball screws).

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Frequently Asked Questions

What is the difference between ball bearings for ball screws and standard radial bearings?

Ball screw bearings are optimized for high axial load capacity and precision alignment, with tighter tolerances (e.g., ABEC 5 or higher) and often preloaded designs to minimize backlash, unlike standard radial bearings which prioritize radial loads.

How often should ball screw bearings be lubricated?

Lubrication intervals depend on operating conditions: typically every 3-6 months for general use, or more frequently in high-speed, high-load, or contaminated environments. Use grease compatible with bearing materials (e.g., lithium-based for steel).

Can these bearings be used in high-temperature applications?

Standard chrome steel bearings operate up to 120°C; for higher temperatures (up to 250°C), specify bearings with heat-stabilized materials like AISI 440C stainless steel or ceramic balls, and high-temperature lubricants.

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.

Ball Bearings (for ball screws)