How do I know if the fan is dying?

Listen for clicking/grinding, check if RPM is much lower than spec, or power off and flick the blade to check for wobble or stiffness.

Can I connect the fan to the power supply?

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

What certifications does the fan have?

The fan is certified with RoHS, ISO, and CE standards, ensuring quality and safety for various applications.

18X18X4mm High Pressure DC Blower Fan for CNC Machine Cooling

Name: 18X18X4mm High Pressure DC Blower Fan for CNC Machine Cooling
Brand: Fengxia Motor (Shanghai) Co., Ltd.
SKU: 2151538742

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

US$3.00

500-4,999 Pieces

US$2.50

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.

1804

Type

DC Blower 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 Durability & Long Life: Double-ball bearings last 5-10 years; sleeve bearings last 2-3 years.

Ultra-Quiet Operation: Hydraulic bearings offer a quiet middle-ground; PWM control ensures precise, silent speed adjustment.

Flexible Voltage Control: Supports 5V-13V operation; 4-pin PWM allows auto speed control for quieter performance.

Wide Application Scope: Suitable for CNC, UAVs, automotive, medical, and consumer electronics cooling.

Customization Available: Full customization from samples or designs; OEM/ODM services available.

Strict Quality Assurance: ISO9001 certified; 100% visual and function inspection before delivery.

Compact & Portable Design: High pressure DC blower fan designed for efficient heat dissipation in tight spaces.

Fast Delivery Service: Standard lead time of one month; competitive pricing and reliable supply chain.

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.

Product Q&A

Q:How can I reduce fan noise?

Use rubber grommets instead of screws to reduce vibration, lower voltage with a resistor, or adjust the BIOS fan curve to keep RPM low until temperatures rise.

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 auto speed control, allowing quieter and more precise operation.

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?

Check arrows on the frame: intake (cool air in) is usually front/side, and exhaust (hot air out) is usually rear/top.

Q:Why does the fan spin at 5V if it is labeled 12V?

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