Should I connect to the motherboard or power supply?

Connect to the motherboard header for speed control (best with 4-pin PWM). Connecting to PSU Molex runs at full 12V speed but is noisier.

Why does the fan spin at 5V if the label says 12V?

The motor has a wide tolerance (5V-13V). It may not start below ~7V but will spin at 5V.

Does having more blades mean better performance?

More blades increase static pressure but may be louder. Fewer blades increase airflow and reduce noise. A balance of 7-9 blades is typical.

How do I know if the fan is dying?

Listen for clicking or grinding, check RPM with software (much lower than spec indicates issues), or manually check for wobble and stiffness.

18X18X4mm High Airflow Low Power Consumption Axial Flow Fan for Laboratory Equipment

Name: 18X18X4mm High Airflow Low Power Consumption Axial Flow Fan for Laboratory Equipment
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2157882112

Shanghai, ChinaFengxia Motor (Shanghai) Co., Ltd.

US$3.50

500-4,999 Pieces

US$2.80

5,000+ Pieces

Sample price:US$4.00/piece.Request sample

Product profile

Customization

Available

Material

Plastic-Iron-Copper-Magnet

Blade Material

PBT 94ulv

Model NO.

FD1804

Type

DC Axial Flow Fan

Electric Current Type

Mounting

Free Standing

Certification

RoHS, ISO, CE

Insulation Resistance

10mωor Over with at DC250V Megger

Ielectric Withstand Voltage

AC500V1s

Ambient Temperature

-10℃~+70℃(Operating) -40℃~+70℃(Storage)

Expected Life

+40° ,30000 Hours

Transport Package

Paper Box

Specification

Customized

Trademark

FUNSHARE

Origin

China

Production Capacity

100000 Pieces/Year

Key features

High Airflow & Low Power: 18x18x4mm design optimized for efficient cooling with minimal energy consumption.

Durable PBT Blade Material: Blades made from PBT 94ulv material for high heat resistance and long service life.

Extended Expected Life: Designed for up to 30,000 hours of operation under normal conditions.

Multiple Bearing Options: Available in sleeve, hydraulic, and double-ball bearings for varied noise and lifespan needs.

Full Customization Service: Supports OEM, ODM, and full customization from samples or designs.

RoHS & ISO Certified: Products meet international safety and quality standards including RoHS, ISO, and CE.

Versatile Application Scope: Suitable for lab equipment, UAVs, automotive, medical devices, and consumer electronics.

Company profile

Importers and ExportersHigh Repeat Buyers Choice

Fengxia Motor (Shanghai) Co., Ltd.

Shanghai, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 5 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤3.13h

AI-Powered supplier vetting

SummaryThe supplier demonstrates strong customization, R&D, OEM/ODM, quality-control, and complaint-handling capabilities. It reports new products within the past year, provides customization from samples and designs through full customization, and serves known brands through OEM. Production includes two lines, inventory capability, defined inspection procedures, and four QA/QC inspectors. However, important operational limitations exist: no available SDK, no overseas agents, branches, warehouse, or showroom, no offline trade-show participation, and only one experienced export-trade employee. Manufacturing controls also show gaps, including no ongoing quantity reconciliation for each batch and no standard operating procedure for outsourced manufacturing. Financial evidence is represented only by years rather than substantive indicators, so credibility cannot be determined. The supplier holds an ISO9001:2015 certificate, but the available information does not establish broader certification coverage.

Supplier typeThe supplier operates as a manufacturer with two production lines, provides OEM and ODM services, offers inventory capability, and accepts FOB and EXW quotations. It also provides full customization, but lacks overseas agents, branches, warehouses, and showrooms.

CertificationsThe supplier reports an ISO9001:2015 certificate. No additional specific certifications are identified in the provided information.

After-Sales capabilityThe supplier has documented and followed procedures for customer complaints and corrective/preventive actions, supporting an established service-response process. However, it has no overseas agents, branches, warehouse, or showroom, which limits demonstrated overseas service infrastructure.

R&D capabilityThe supplier reports new products in the past year, provides ODM services, and assigns R&D personnel to product development, design drawings, production support, and specifications. Nevertheless, it has no available SDK and no design input, output, review, validation, or confirmation documents available for audit.

Production capacityProduction evidence includes two production lines, inventory capability, one-month average lead times in both peak and off-season periods, four QA/QC inspectors, written finished-product inspection instructions, and multiple listed production machines. Controls are weakened by the absence of ongoing batch quantity reconciliation and a standard operating procedure for outsourced manufacturing.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, and full customization, with the same capability reported under both R&D and design services. This directly demonstrates broad customization coverage.