INDUSTRY COMPONENT

Precision Bearing

High-precision bearing for accurate rotational positioning in industrial actuators

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Component Specifications

Definition
A precision-engineered rolling-element bearing designed to minimize friction and maintain exact rotational alignment in theta-axis actuators, featuring tight dimensional tolerances, optimized raceway geometry, and specialized lubrication for high-speed, high-accuracy applications in industrial automation systems.
Working Principle
Utilizes precisely manufactured balls or rollers between inner and outer rings to facilitate smooth rotation with minimal friction and radial/axial play, maintaining consistent contact angles and preload to ensure accurate angular positioning and load distribution in theta-axis motion systems.
Materials
Bearing rings: AISI 52100 chrome steel (HRC 58-62) or ceramic (Si3N4); Rolling elements: AISI 52100 steel, ceramic (Si3N4/ZrO2), or hybrid ceramic-steel; Cage/retainer: Glass-fiber reinforced polyamide (PA66-GF25), brass (CuZn39Pb3), or steel; Lubrication: Synthetic ester-based grease (ISO VG 32-68) or oil-mist systems
Technical Parameters
  • Width 9-23 mm
  • Speed Limit 15,000-30,000 rpm (grease), 40,000+ rpm (oil)
  • Inner Diameter 10-50 mm
  • Outer Diameter 30-90 mm
  • Precision Class ABEC 5/7/9 (ISO P4/P2)
  • Radial Clearance C2 to C0 (2-13 μm)
  • Static Load Rating 2.5-25 kN
  • Dynamic Load Rating 5-45 kN
  • Operating Temperature -30°C to +120°C
Standards
ISO 492, ISO 199, DIN 625, DIN 5412

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Precision Bearing.

precision bearing theta-axis actuator bearing industrial automation bearing high-speed bearing ABEC bearing rotary motion component Precision Bearing in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Theta-axis Actuator

A precision rotary actuator that controls the angular orientation (theta) of components during placement operations.

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Articulation Joints

Mechanical joints that enable multi-axis rotation and movement in CMM arms.

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Engineering Analysis

Risks & Mitigation
  • Incorrect preload causing premature wear
  • Contamination from improper sealing
  • Lubrication breakdown at high speeds
  • Misalignment during installation
  • Thermal expansion affecting clearance
FMEA Triads
Trigger: Inadequate sealing allowing contaminant ingress
Failure: Abrasive wear, increased friction, vibration, reduced accuracy
Mitigation: Use labyrinth seals or contact seals with appropriate IP ratings, implement clean installation procedures, regular maintenance checks
Trigger: Excessive preload during assembly
Failure: Overheating, accelerated fatigue, reduced service life
Mitigation: Follow manufacturer torque specifications, use calibrated tools, verify preload with dial indicators or torque meters

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Radial runout ≤ 5 μm, axial runout ≤ 3 μm per ISO 199 Class P4
Test Method
Vibration analysis per ISO 15242, dimensional verification per ISO 1132-2, endurance testing under simulated load conditions

Buyer Feedback

★★★★☆ 4.8 / 5.0 (26 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Precision Bearing meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Precision Bearing arrived with full certification."

"Great transparency on the Precision Bearing components. Essential for our Machinery and Equipment Manufacturing supply chain."

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Frequently Asked Questions

What distinguishes precision bearings from standard bearings in theta-axis actuators?

Precision bearings feature tighter dimensional tolerances (ABEC 5+), optimized raceway geometry, specialized materials, and controlled preload to minimize rotational error, vibration, and thermal expansion effects critical for accurate angular positioning.

How does bearing preload affect theta-axis actuator performance?

Proper preload eliminates internal clearance, increases stiffness, reduces deflection under load, and improves rotational accuracy but requires careful adjustment to avoid excessive friction, heat generation, and reduced bearing life.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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