WINSINN 50mm 5015 Blower Fan 24V, Brushless Cooling Turbine Hydraulic Bearing 2PIN (Pack of 4) Review (2026)

What this product is

This listing is a pack of four WINSINN 50mm 5015 blower fans rated for 24V operation, built as brushless units with a hydraulic bearing rather than a basic sleeve bearing. The 5015 designation refers to the fan's shape and size, roughly 50mm across and 15mm thick, which is the standard blower format used for part cooling shrouds on many hobbyist 3D printers including common Creality and similar Cartesian machines. Each fan connects through a 2-pin lead rather than the 3-pin or 4-pin connectors found on some fans that report tachometer speed back to the mainboard.

Bearing type and expected lifespan

Hydraulic bearing fans generally run quieter and last longer than basic sleeve bearing fans, since the bearing design reduces friction and wear over long duty cycles, though they typically cost a little more than the cheapest sleeve bearing alternatives and usually run a bit louder than premium dual ball bearing designs. For a part cooling fan that may run continuously during long prints, bearing quality matters more than it does for fans that only run intermittently, since part cooling fans accumulate significant runtime over the life of a printer. A hydraulic bearing is a reasonable middle ground between cost and durability for this role.

Why buy a four-pack

Buying four fans at once makes sense for anyone running multiple printers that all use the same 5015 blower format, or for anyone who wants spares on hand before a fan fails mid-print and stalls a job. Since blower fans are a common wear item, especially in printers that run frequently, having replacements ready avoids waiting on a single-unit order when one fails. For someone with only one printer and no plan to keep spares, a four-pack may be more fans than needed, though the per-unit cost is typically lower than buying single fans repeatedly.

Connector and duct compatibility

The 2-pin connector on this fan is a simple, common style, but not every 3D printer mainboard uses the same connector shape or pin spacing for its part cooling fan header, so some installs may need to cut and re-terminate the connector or use an adapter cable. Buyers should check their printer's stock fan connector before ordering rather than assuming a plug-and-play fit. Likewise, the 5015 blower shape needs a duct or shroud designed around that specific footprint, so a printer using a 4010 axial fan or a different blower size in its stock cooling setup will need a compatible duct change alongside the fan swap.

Where this fits in a 3D printing setup

Part cooling fans like this one direct airflow onto freshly extruded plastic to solidify overhangs, bridges and fine details quickly, which is especially important for PLA prints that rely on rapid cooling to hold shape. A failing or underpowered part cooling fan often shows up as sagging overhangs, poor bridging, or blobby fine details even when the rest of the printer is dialed in correctly, making this a common upgrade or replacement part for anyone troubleshooting print quality. Since the fan is a standard 5015 blower, it is also a reasonable upgrade choice for printers shipped with a weaker stock cooling fan. Keeping a spare from this pack on the shelf means a sudden fan failure interrupts a print queue for minutes rather than days spent waiting on a replacement to arrive.

Frequently asked questions