5015 12V Centrifugal Blower 50mm Radial Turbo Cooling Fan

Specifications

• Fan Size: 50mm x 50mm x 15mm 
• Operating Voltage: 12V DC 
• Current Rating: 0.15A - 0.28A 
• Connector Type: 2-Pin JST-XH (2.54mm pitch)
• Bearing Type: Oil/Sleeve Bearing
• Airflow Style: Radial / Centrifugal (Side Intake, 90° Outlet)
• Cable Length: ~15-20cm
• Noise Level: Moderate 
• Material: PBT Plastic (Black)

Applications

• 3D Printer Part Cooling: The go-to fan for popular duct upgrades like the "Hero Me," "Petsfang," or "Bullseye" on 12V printers (or 24V printers with a buck converter).
• CNC Spindle Cooling: Direct cool air onto the cutting bit to clear chips and reduce heat buildup.
• Smoke Extraction: High suction makes it excellent for pulling solder fumes away from a workspace through a small filter.
• Electronic Component Cooling: Force air through dense heatsink fins on motor drivers or power supplies.

Project Evolution:

The "High-Performance" Upgrade Path

• The Bottleneck: Your stock printer fan blows "around" the nozzle, not "at" the plastic. This causes sagging on bridges and rough surfaces on steep angles.
• The Upgrade: Installing dual 5015 blowers is a common pro-tier upgrade. This single 5015 unit moves significantly more air at higher pressure than a 4010 axial fan, allowing you to print faster without sacrificing quality.
• Effort Level: Intermediate. You may need to print a mounting bracket (duct) before installing this fan.
• Compatibility Check: This is a 12V fan.
  • ✅ 12V Printers: Direct drop-in (e.g., Older CR-10, Wanhao i3).
  • ⚠️ 24V Printers (Ender 3/Pro/V2): You MUST use a Buck Converter to step down 24V to 12V, or wire two 12V fans in series (advanced). Connecting this directly to 24V will destroy it instantly.

Wiring & Safety Guide

• Pinout:
  • Red: +12V DC
  • Black: GND (Ground)
• Probots Logic-Safe™ ⚡: Verified for standard 12V DC operation.
• PWM Note: While this is a 2-wire fan, it supports speed control via voltage modulation (PWM) from your printer's mainboard (fan port). Note: At very low PWM duty cycles (<20%), the fan may stall. Set a minimum speed in your firmware.

Package Includes:

• 1 x 5015 12V Centrifugal Fan Blower
  

Note: Mounting screws are not included

Frequently Asked Questions (FAQ)

• Will this work on my Ender 3 V2? The Ender 3 V2 is a 24V system. You cannot connect this 12V fan directly. You must use a Buck Converter (LM2596) to drop the voltage from 24V to 12V.
• Why is this better than the stock fan? Stock fans are "axial" (low pressure). This is a "centrifugal" blower (high pressure), which can push air through narrow ducts to cool the print nozzle directly.
• Is this fan loud? It moves a lot of air, so there is a "whoosh" sound at 100% speed. It is generally louder than a stock silent axial fan but offers far superior cooling.
• Can I use two of these together? Yes, many custom ducts use dual 5015 fans. You can wire them in parallel to a single fan port (ensure the port can handle ~0.5A).
• Does it have a connector? Yes, it comes with a standard 2-pin JST-XH connector (2.54mm pitch). You may need to splice wires if your printer uses a different plug.
• What happens if I plug this into 24V? It will spin extremely fast for about 2 seconds, emit magic smoke, and then die. Permanent damage will occur.
• Can I use this for a Voron printer? Voron designs usually specify 24V fans, but if you are running a 12V rail or have a 12V PSU, this will work. Check your BOM.
• What is the lifespan of this fan? With its oil-impregnated sleeve bearing, expect ~30,000 hours of runtime at room temperature.
• Does it support PWM speed control? Yes, your printer board controls speed by pulsing the power (PWM) to the 2 pins. It works with standard slicer fan settings (0-100%).
• Why does the fan whine at low speeds? This is often due to the PWM frequency of the mainboard, not the fan itself. Enabling "Soft PWM" in Marlin firmware can fix this.
• How do I mount this? It uses standard M4 screws. You usually mount it to a 3D printed duct or bracket.
• Is this fan brushless? Yes, it is a Brushless DC (BLDC) motor fan.
• Can I use this to cool a Raspberry Pi? Only if you have a 12V power source. Raspberry Pis run on 5V. Using this on 5V will result in very weak airflow, or it won't spin at all.
• What is the airflow rating (CFM)? Typical 5015 blowers are rated around 3.5 - 5.5 CFM, but the key metric here is static pressure, not just volume.
• Can I use this as a heatsink fan? Yes, if you have a shroud that directs the air into the heatsink fins. It is excellent for dense fin stacks.
• Is the polarity marked? Usually not in the case, but Red is always Positive (+), and Black is Negative (-).
• My fan isn't spinning, just vibrating. Why? Check your voltage. If you are feeding it 5V, it might not have enough torque to start. Or, your PWM setting is too low (<10%).
• Can I oil this fan? Technically, yes, peel back the sticker to access the bearing, but it's a sealed unit intended to be replaced when worn.
• Is this waterproof? No. Keep it away from water and conductive liquids.
• How long is the cable? The cable is approximately 15cm to 25cm long. You may need an extension cable for large printers.