120 mm to 140 mm Fan Adapter

Description

Overview

Puts a 140 mm fan on a 120 mm mounting. A bigger fan moving the same air spins slower, and a slower fan is a quieter fan — which is the single most effective noise change available to most home miners that does not involve building a box.

What it fits

Mounting holes match the standard 120 mm fan pattern on one face and the standard 140 mm pattern on the other, with a shaped transition between the two apertures rather than a flat plate.

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 to the 120 mm fan position on your chassis, mount a 140 mm fan to the outer face, and run the larger fan at a lower speed for the same airflow. It also lets you standardise a mixed fleet onto one shroud size — put adapters on the 120 mm machines and buy only 140 mm shrouds.

Why it helps

Fan noise scales steeply with tip speed. Moving the same volume of air with a larger, slower fan is genuinely quieter in a way that does not cost you cooling, unlike simply turning the stock fan down. It is also cheap. The catch is depth: you are adding the thickness of the adapter plus the new fan, so check your clearance first.

• Standard 120 mm pattern on one face, 140 mm on the other
• Shaped transition rather than a flat plate with a hole
• Lets a mixed fleet standardise on one shroud size
• 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

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

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

Frequently asked questions