How do I know if the fan is dying?

Listen for clicking or grinding noises. Check RPM using software like HWMonitor; significantly lower RPM than spec indicates issues. Check if blades spin freely without wobble.

Can I connect the fan to the power supply?

Yes, connecting to a PSU Molex runs it at 12V full speed, which is simple but noisier. Motherboard headers enable speed control, best with 4-pin PWM.

Does more blades mean better performance?

More blades provide higher static pressure but are slightly louder. Fewer blades provide higher airflow and lower noise. A balance of 7-9 blades is typical.

18X18X4mm Low Noise High Quality Axial Flow Fan for Projector Cooling

Name: 18X18X4mm Low Noise High Quality Axial Flow Fan for Projector Cooling
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2154347502

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

Ultra-Quiet Operation: Designed for low noise performance, suitable for projectors and VR headsets.

High Durability: Double-ball bearings last 5-10 years; sleeve bearings last 2-3 years.

Wide Voltage Tolerance: Operates effectively within a 5V to 13V voltage range.

Customization Options: Supports full customization from samples, designs, and specific needs.

Multiple Bearing Types: Available in sleeve, hydraulic, and double-ball bearings for different needs.

Certified Quality: ISO9001 certified with FCC, CE, and ROHS compliance.

Versatile Applications: Ideal for notebooks, projectors, UAVs, and miniature electronic devices.

Flexible Control: Supports 3-pin DC voltage control and 4-pin PWM auto speed control.

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: ≤3.38h

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.

Product Q&A

Q:How can I reduce fan noise?

Check mounting screws for looseness, remove dust buildup, lower RPM via BIOS, or use rubber grommets instead of screws to reduce vibration.

Q:What is the difference between 3-pin and 4-pin fans?

3-pin fans use DC voltage control for fixed or stepped speeds. 4-pin fans use PWM for automatic, precise, and quieter speed control. A 4-pin fan on a 3-pin header runs at full speed.

Q:How long does the fan last?

Sleeve bearings last ~2-3 years. Hydraulic bearings last ~4-5 years. Double-ball bearings last 5-10 years and tolerate 24/7 operation.

Q:Which direction should the fan face?

Look for arrows on the frame. Front/side is usually intake (cool air in), and rear/top is exhaust (hot air out). Tower coolers push air toward the rear exhaust.

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

The motor has a wide tolerance range of 5V to 13V. It might not start below ~7V but will spin at 5V.