BERSERKER VINDR Ultra-Performance 4010 Axial Fan 24V 4010A-24V-A 40x10mm

BERSERKER VINDR 4010 Axial Fan — 24V 9000 RPM, 3-Wire Tachometer, Class F 155°C, Ultra-Performance Hotend Cooling Fan

The BERSERKER VINDR 4010 Axial Fan is a purpose-sourced hotend cooling fan engineered to outperform every readily available 3D printer fan on the market. Tested against the leading performance fan in the same size class and benchmarked at 35% better airflow, this 40×10mm axial fan runs at 9000 RPM, delivers 8.4 CFM, and is rated for sustained operation in high-temperature enclosures with an Insulation Class F (155°C) rating — the class above the standard Class B that ships on most 3D printer fans. Built on dual ball bearings for service life, and wired with a dedicated tachometer line so Klipper can monitor RPM in real time and act on it.

⚠️ A diode may be required on the tachometer signal line depending on your board. If your board doesn't tolerate the tachometer signal directly, add a small signal diode on the line before connecting. If you have no spare signal pin, cut the tachometer wire and the fan operates as a standard 2-wire PWM fan with no other modification needed.
⚠️ High-temperature environment note: Sustained operation at elevated ambient temperatures increases bearing wear and reduces expected service life. Class F insulation extends the ceiling — it doesn't eliminate the tradeoff.

35% Better Than the Performance Fan — What That Means in Practice

The fan market for 3D printers is flooded with listings that recycle the same generic 4010 specification. West3D's BERSERKER team tested the VINDR head-to-head against what was considered the leading performance 4010 axial fan on the market and measured a 35% airflow improvement under the same load conditions. For a hotend cooling fan, airflow directly determines how effectively your heatsink stays cold — which determines how sharp your thermal gradient is between the hot and cold zones of your heatbreak. Better airflow means lower cold-end temperature, sharper gradient, and significantly reduced risk of heat creep during sustained high-speed printing where the hotend is under continuous thermal stress.

3-Wire Tachometer — RPM Monitoring and Proactive Failure Response

Most 3D printer fans are 2-wire — power and ground. Some premium options add an alarm line that sends a signal when the fan has failed completely. The VINDR goes further with a dedicated hardware tachometer line that reports actual RPM in real time to Klipper. The difference matters:

• Alarm-only fans: You find out the fan is dead — after heat creep has already destroyed a print or, worse, damaged the hotend
• VINDR tachometer: Klipper polls RPM continuously and can trigger a macro the moment RPM drops significantly — pausing the print, killing hotend power, and preventing thermal runaway before damage occurs

A fan that slows before it fails gives you a window to act. Real-time RPM monitoring turns that window into an automated safety response.

Insulation Class F — 155°C Rating for Enclosed Printers

Standard 3D printer fans use Class B insulation, rated to 130°C. In an enclosed printer running ABS or ASA at 60–70°C chamber temperature, with the fan mounted close to the heatblock, the winding insulation on a Class B fan is operating close to its ceiling. Insulation degradation is cumulative and invisible until it causes a failure. The VINDR uses Class F insulation rated to 155°C — a 25°C safety margin above Class B — giving the motor windings meaningful headroom in hot-chamber environments and significantly extending service life under sustained thermal load.

Dual Ball Bearings — Long Service Life Under Continuous Operation

Sleeve bearings are common in budget fans because they're cheap. They also develop wobble over time, generate increasing noise, and eventually fail. The VINDR uses dual ball bearings — the same bearing type used in industrial fan applications — for longer rated service life, consistent airflow performance throughout that life, and better tolerance of the orientation changes and vibration that come with a moving toolhead.

Specifications

Klipper Configuration

Add the following tachometer parameters to your [heater_fan hotend_fan] section in printer.cfg:

[heater_fan hotend_fan]
pin: # your fan pin
tachometer_pin: # your tachometer signal pin
tachometer_ppr: 2
tachometer_poll_interval: 0.0005

Once configured, Klipper exposes the fan's measured RPM via printer["heater_fan hotend_fan"].rpm, which you can use in macros to trigger a safe shutdown if RPM drops below a threshold during printing.

When Do You Need This?

Swap to the VINDR if you're running an enclosed printer, pushing sustained high speeds, or have experienced heat creep events that disrupted prints. It's also the correct upgrade when you want Klipper-level fan health monitoring — not just a dead-fan alarm, but live RPM data you can act on proactively. For any builder who has already tuned every other variable and wants the hotend cooling system to match the rest of the build's performance level, the VINDR is the correct fan.

Browse the full BERSERKER VINDR fan lineup — including 4010 blower, 5015 blower, and 3010 axial — at 3D Printer Cooling Fans, or explore all performance upgrades at 3D Printer Upgrades.