Computer Cooling Fan Bearing Assembly

Product Specifications

Technical details and manufacturing context for Computer Cooling Fan Bearing Assembly

Definition

This bearing assembly is a precision mechanical component used in the manufacture of computer cooling fans. It provides smooth rotational support for the fan rotor shaft, minimizing friction and vibration while maintaining proper alignment under radial and axial loads. The assembly directly influences fan lifespan, noise levels, and thermal performance in computing systems. It is a key B2B supply chain component for fan manufacturers who integrate it into cooling solutions for servers, workstations, and consumer electronics. Industrial buyers specify these assemblies based on durability requirements and operating conditions. The assembly typically uses precision ball bearings or hydrodynamic surfaces, with materials such as stainless steel 440C, polyamide 66 (nylon), and lithium complex grease. Key parameters include bearing diameter (3–8 mm), axial load capacity (10–50 N), radial play (2–20 μm), operating temperature range (-20 to 70 °C), lubrication type (grease), expected lifespan (30,000–50,000 hours), noise level (20–30 dB(A) at 1 m), vibration grade (V1–V2), material grade (G10), and weight (1–5 g). These values are reference ranges and must be verified for the specific model and application. Standards such as ISO 15, ISO 76, ISO 5753, ISO 281, ISO 3744, ISO 15242, and ISO 683-17 are referenced for procurement and verification, but do not imply certification or compliance. Buyers should confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The bearing assembly provides low-friction rotational support for the fan rotor shaft. It uses precision ball bearings or hydrodynamic surfaces to maintain alignment while distributing radial and axial loads. The design minimizes friction and vibration, ensuring smooth rotation and reducing wear. The assembly is engineered to operate within specified temperature and load ranges, with lubrication provided by grease to reduce friction and dissipate heat. The bearing's internal clearance (radial play) is controlled to optimize performance and noise levels. The assembly is designed to handle axial loads up to a specified capacity and to operate for a defined lifespan under rated conditions. Proper installation and maintenance are essential to achieve the expected performance and longevity.

Common Materials

Stainless Steel 440C, Polyamide 66 (Nylon), Lithium Complex Grease

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bearing DiameterRequired	3–8 mm	Inner diameter of bearing raceISO 15
Axial Load CapacityRequired	10–50 N	Maximum axial force before failureISO 76
Radial PlayRequired	2–20 μm	Clearance between bearing elementsISO 5753
Operating Temperature RangeRequired	-20–70 °C	Minimum to maximum operating temperature
Lubrication Type	Grease text	Grease or oil specification
Expected LifespanRequired	30000–50000 hours	MTBF under rated conditionsISO 281
Noise Level	20–30 dB(A)	Measured at 1 mISO 3744
Vibration Grade	V1–V2	Low vibration for quiet operationISO 15242
Material Grade	G10	Bearing steelISO 683-17
Weight	1–5 g	Depends on size

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

Components / BOM

Inner Race Part
Interface with rotating shaft

Material: Hardened Stainless Steel
Outer Race Part
Stationary housing interface

Material: Stainless Steel
Ball Elements Part
Reduce friction between races

Material: Chrome Steel
Retainer Part
Maintain ball spacing and alignment

Material: Polyamide
Seal Shield Optional Part
Contain lubricant and exclude contaminants

Material: Rubber or Metal

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Computer Cooling Fan Bearing Assembly.

Manufacturers of Computer Cooling Fan Bearing Assembly

Manufacturer profiles associated with Computer Cooling Fan Bearing Assembly.

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Frequently Asked Questions

What materials are used in this bearing assembly?

The assembly may use stainless steel 440C for bearing components, polyamide 66 (nylon) for cages or housings, and lithium complex grease for lubrication. Material grades and specific compositions should be confirmed with the manufacturer.

What is the expected lifespan of this bearing assembly?

The expected lifespan is 30,000 to 50,000 hours under rated conditions, based on ISO 281. Actual lifespan depends on operating conditions, load, speed, and maintenance. Verify with the supplier for your specific application.

How does the bearing assembly affect fan noise?

The bearing assembly is designed to minimize vibration and noise. The noise level is specified as 20-30 dB(A) measured at 1 meter, per ISO 3744. Proper installation and lubrication are critical to achieving these levels.

What standards apply to this bearing assembly?

Relevant standards include ISO 15 for bearing dimensions, ISO 76 for load ratings, ISO 5753 for radial play, ISO 281 for lifespan, ISO 3744 for noise, ISO 15242 for vibration, and ISO 683-17 for material grade. These are references for verification, not certifications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric to 1.5 bar
other spec:	Max RPM: 3000, Vibration Limit: 0.5G, Noise Level: <25 dBA
temperature:	-10°C to +70°C