140 mm to 120 mm Fan Adapter

Description

Overview

The other direction: a 120 mm fan on a 140 mm mounting. Less about acoustics, more about logistics — 120 mm is the size the world actually stocks, in every speed, bearing type and static-pressure rating you could want.

What it fits

Standard 140 mm mounting pattern on one face, standard 120 mm on the other, with a shaped transition between the apertures. Useful on Whatsminer-class hardware and anything else built around 140 mm fan positions.

Measure before you order. Fit dimensions in this line are derived from published fan and chassis geometry and are not yet validated against measured production hardware. Check your flange size and the clearance around your machine against the footprint in the specifications below. If something does not fit, tell us — that is how the next revision gets better.

How it is used

Fit it where a 140 mm fan lives, mount a 120 mm fan to the outer face. The usual reasons are availability — a 140 mm replacement is not in stock and the machine needs to run today — or specification, because you want a specific high-static-pressure 120 mm fan that has no 140 mm equivalent.

Why it helps

The 120 mm fan market is enormous and the 140 mm market is not. Being able to fall back to 120 mm means a fan failure does not idle a machine while you wait for a part, and it means you can choose from the full range of industrial-grade options rather than whatever the 140 mm shelf happens to hold. Expect to run the smaller fan faster to match the airflow, with the noise that implies.

• Standard 140 mm pattern on one face, 120 mm on the other
• Opens up the much larger 120 mm fan market for repairs and upgrades
• Access to high-static-pressure 120 mm fans with no 140 mm equivalent
• Single continuous body, no assembly

Specifications

Open source — print it yourself, or buy it finished

Every shroud D-Central designs is released as an open file. The geometry for this part is free to download from our 3D models download center: use it, modify it, remix it, run it in your own shop, sell what you make from it. There is no licence to buy and no design gated behind a purchase. Shared knowledge is the whole reason this industry has open hardware at all, and we are not going to be the ones who stop passing it on.

This listing is for the finished part: made to order in PETG and shipped from Montreal, Quebec. If you would rather have it in your hands than spend an evening making one, buy it here — that is what pays for the next design in the line. You can also support the open-source work directly through D-Central’s fund page.

Works with

• 120 mm to 140 mm Fan Adapter
• 120 mm Intake Filter Ring
• Whatsminer 140 mm Fan to 8″ Duct Shroud
• Universal Single 120 mm Fan to 6″ Duct Shroud

See the full D-Central shroud and ducting system for the compatibility matrix and sizing guide.

Frequently asked questions