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Square black 70mm frame 15mm thick three-pin case fan

BGears

BGears b-Blaster 70 70mm 15mm 4500 RPM 48 CFM 24 dBA 3-pin case fan

SKU CH-J1MS-8HD6M MPN b-Blaster 70

A 70 mm case fan with dual ball bearings spins at 4500 RPM to deliver 48 CFM airflow at 24 dBA noise

  • Fan Counts1 Fan
  • Fan ControllerNo Controller
  • TypeCase Fan
  • Fan Size70mm
  • Fan Thickness15mm
  • Bearing Type2 Ball
  • Extended lifespan from dual ball bearing design
  • High airflow of 48 CFM at 4500 RPM
  • Quiet operation at 24 dBA noise level
  • Standard 3-pin connector with speed signal
  • Compact 70mm by 15mm size fits tight spaces

Compact 70 mm case fan

The BGears b-Blaster 70 is a 70 mm by 15 mm case fan that spins at 4500 RPM and delivers 48 CFM of airflow at a rated 24 dBA. It uses a dual ball-bearing design and a standard three-pin connector with speed signal output. Four mounting screws are included for direct installation.

Upgrade from sleeve-bearing or slower 70 mm fans

This model replaces older 70 mm fans that use sleeve bearings or run at lower speeds, offering longer service life and higher static pressure for tight spaces. The jump is worth it when a chassis, power supply or CPU heatsink demands more airflow than a standard low-speed fan can provide.

Builders fitting 70 mm mounts in cases.

It suits anyone needing a high-speed 70 mm replacement with a three-pin header and ball-bearing reliability. Buyers who require PWM speed control, larger fan frames or lower noise levels should look at other options.

Highlights

  • Extended lifespan from dual ball bearing design
  • High airflow of 48 CFM at 4500 RPM
  • Quiet operation at 24 dBA noise level
  • Standard 3-pin connector with speed signal
  • Compact 70mm by 15mm size fits tight spaces

Specifications

BrandBgears
Modelb-Blaster 70
Fan Counts1 Fan
Fan ControllerNo Controller
TypeCase Fan
Fan Size70mm
Fan Thickness15mm
Bearing Type2 Ball
RPM4500 RPM
Air Flow48 CFM
Noise Level24 dBA
Power Connector3 Pin
Dimensions70.00 x 70.00 x 15.00 mm
Shipping weight0.05 kg
Package size112 × 99 × 18 mm

Questions about this item

Will the 70 mm by 15 mm frame and four included screws fit a standard 70 mm case mount?

Yes — the fan measures 70.00 x 70.00 x 15.00 mm and ships with four mounting screws that match standard 70 mm hole spacing.

How do I connect the 3-pin lead so the motherboard reads the 4500 RPM speed signal?

Align the three-pin connector with the motherboard header tab, press it straight on, then enable fan monitoring in BIOS so the tachometer wire reports the 4500 RPM speed.

When should I expect to replace the 2 ball bearing fan that runs at 4500 RPM?

The dual ball bearing design is rated for extended life at 4500 RPM; plan replacement when noise rises above the specified 24 dBA or airflow drops below 48 CFM.

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