Should I connect to the motherboard or power supply?

Connect to the motherboard header for speed control (best with 4-pin PWM) or PSU Molex for full speed at 12V.

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

Most motors have a wide tolerance running from 5V to 13V, though they may not start below approximately 7V.

Do more blades mean better performance?

More blades increase static pressure but may be louder; fewer blades increase airflow with lower noise. 7-9 blades is typical.

How do I know if the fan is dying?

Listen for clicking/grinding, check RPM via software for significant drops, or manually spin blades to check for wobble or stiffness.

18184mm Square Motor Brushless Cooling Centrifugal DC Blower

Name: 18*18*4mm Square Motor Brushless Cooling Centrifugal DC Blower
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2236400795

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

18*18*4mm Square Motor Brushless Cooling Centrifugal DC Blower

US$2.50-3.00

1 Piece

Sample price:US$2.50/piece.Request sample

Product profile

Customization

Available

Material

Aluminum Fan

Blade Material

PBT 94ulv

Model NO.

1804 DC Blower

Type

DC Blower Fan

Electric Current Type

Mounting

Free Standing

Certification

RoHS, ISO, CE

Transport Package

Paper Box

Specification

18*18*4mm

Origin

China

Production Capacity

100000 Pieces/Year

Key features

Wide Voltage Compatibility: Operates reliably within a 5V to 13V voltage range for flexible power integration.

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

Full Customization Service: Supports customization from samples, designs, and offers full customization options.

Multi-Industry Application: Widely used in drones, automotive, medical, and industrial control equipment.

International Certifications: Products certified with RoHS, ISO, CE, and FCC for global market compliance.

High-Quality Materials: Constructed with Aluminum Fan and PBT 94ulv Blade Material for durability.

Professional Technical Support: Provides professional technical guidance and complete customization services.

Strict Quality Control: 100% visual and function inspection with ISO9001:2015 management system.

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: ≤3.87h

AI-Powered supplier vetting

SummaryThe supplier provides extensive customization options and has a strong research and development capability, including ODM services and new product development. However, they lack overseas warehouse and showroom capabilities, and do not have overseas agents or participate in trade shows. Their financial data is up-to-date and they hold an ISO9001:2015 certification. Despite having quality assurance processes, the manufacturing capacity seems limited with only two production lines and no ongoing volume reconciliation or outsourcing SOPs.

CertificationsHolds an ISO9001:2015 certificate, indicating compliance with quality management standards.

After-Sales capabilityHas clear procedures and records for handling customer complaints and implementing corrective actions.

Financial creditFinancial data is current, with information available up to the last three years, demonstrating financial stability.

R&D capabilityStrong R&D capabilities with evidence of new product development, though lacking in audit documentation.

Production capacityLimited production capability with only two production lines, and lacks ongoing volume reconciliation and outsourcing SOPs.

Customization capabilityOffers full customization services from samples and designs, with a comprehensive design service capability.

Client casesProvides OEM services for well-known brands, suggesting a history of working with reputable companies.

Product Q&A

Q:What causes fan noise and how to fix it?

Check for loose screws causing vibration, remove dust buildup, lower RPM via BIOS, or choose hydraulic bearings for a quieter operation.

Q:Which direction should the fan face?

Follow arrows on the frame: intake for front/side (cool air in) and exhaust for rear/top (hot air out).

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

3-pin uses DC voltage control with fixed speeds, while 4-pin uses PWM for automatic, quieter, and more precise speed variation.

Q:How long does the fan last?

Sleeve bearings last 2-3 years, hydraulic bearings 4-5 years, and double-ball bearings 5-10 years under 24/7 use.

Q:How can I make the fan quieter?

Use rubber grommets instead of metal screws, use a low-noise adapter to drop voltage, or adjust the BIOS fan curve.

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18184mm Square Motor Brushless Cooling Centrifugal DC Blower