35mm 3510 24V Mini 3D Printer Cooling Fan - Pack of 4

In this review the reviewer tested the 4 Pieces 35mm 35x10mm 3510 DC 24V 2Pin Mini 3D Printer Cooling Fan C49 to see whether it is a practical replacement fan pack for hobbyist and small-scale 3D printer builds. The bottom line: this pack is for builders who need a compact, higher-voltage cooling option in a tidy package, offering a long rated life and plug-and-play two-pin connectors. The reviewer found it most useful where space is tight and a 24V system is already in place, and notes its modest airflow and quiet sleeve bearings compared with larger fans.

Key Features

• 35x35x10mm compact size: Fits tight mounting points and direct mount positions on many small extruder assemblies and control boards.
• 24V rated voltage: Works natively with 24V driven printers and reduces the need for step-down wiring or adapters.
• Two-pin XH2.54 connector: Provides a simple plug-in installation without soldering for most controller boards that use standard two-pin headers.
• Long rated life: The listed 35000 hour life gives confidence for prolonged use in non-critical cooling roles.
• Lightweight at 10g each: Adds minimal weight to moving assemblies, which helps preserve print quality on lightweight carriages.

Who It's For

This pack is aimed at 3D printer tinkerers and small workshop builders who run a 24V system and need multiple identical replacement fans. It is a sensible choice for those replacing worn fans in hotends, compact part cooling ducts, or electronics bay ventilation where space and weight are constraints.

Users who require ultra-high airflow, precision ball bearings for continuous high-RPM duty, or a fan with an integrated tachometer should look elsewhere; the sleeve bearing design and modest airflow numbers suit moderate duty cycles rather than continuous heavy-load cooling.

Pros & Cons

Pros

• Very compact profile makes the fans easy to mount in constrained enclosures and on extruder assemblies.
• 24V compatibility avoids extra conversion for printers already on that bus voltage.
• Simple two-pin XH2.54 connector allows quick replacement and reduces installation time.
• Lightweight construction minimizes additional moving mass on print heads.

Cons

• Sleeve bearing design is quieter but less durable under continuous high-RPM use compared with ball bearings.
• Airflow and noise specs as listed are modest and may not meet demands for heavy-duty cooling applications.

Specifications

Our Verdict

The 35mm 3510 24V mini fan pack is a practical, cost-effective option for hobbyists and small workshop builders running 24V systems who need compact, lightweight replacement cooling. It represents good value when used in moderate-duty roles such as part cooling and electronics bay ventilation, but those needing maximum longevity under continuous heavy loads should consider fans with ball bearings and higher reported airflow.

Frequently Asked Questions

Are these fans plug-and-play on most 24V boards?
Yes, they use a two-pin XH2.54 connector that plugs into most 24V two-pin headers without soldering.

Will the sleeve bearings be noisy?
Sleeve bearings are generally quieter initially, but they are not as durable for continuous high-RPM duty as ball bearings.

Can I use these on a 12V printer?
They are rated for 24V; using them on 12V will reduce speed and airflow substantially and is not recommended for original performance.