$38.99 CAD
Threaded duct collar shroud for the Antminer S19 and S21: a screw-on 6-inch joint that also takes a blank-off cap when the machine is idle. Wide 260 mm mounting plate, receiver and cap sold separately. PETG, made to order in Montreal, Quebec.
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Use the S21 cluster to connect current-generation specs, buying options, chip-level parts, troubleshooting, and repair support.
A threaded duct collar turns the duct connection into a screw joint. This shroud hoods both 120 mm exhaust fans of an Antminer S19 or standard S21 into one plenum, and ends in a printed male thread instead of a plain collar. The matching 6-inch threaded duct receiver carries your 6-inch duct and screws straight onto it — hand tight, no band, no driver.
The thread earns its keep twice. Its second job is the threaded collar cap: when a machine comes down for service or sits idle through a warm month, the receiver comes off and the cap screws on in its place, sealing the machine out of a shared duct run so the miners still working do not push air back through a dead one.
The shroud on its own ends in a thread, so plan on ordering a mate with it. For duct straight onto a collar, take the plain wide-base 6-inch shroud. If the joint needs to come apart in one movement rather than several turns, the wide-base bayonet shroud is quicker. The same thread on the 250 mm flange is the standard-base threaded shroud.
A screw thread is a wedge wrapped around a cylinder, and that is why it holds: turning it converts a small hand force into a large axial pull that draws the two faces together and keeps them there. A hose clamp does something different — it squeezes radially and relies on friction to resist a pull along the axis. For a joint made and unmade regularly the thread has better manners: engagement spreads over many turns instead of one band, and it lands at the same depth every time.
| Fits | Antminer S19 series and standard S21, and any dual 120 mm exhaust face on the same pattern |
|---|---|
| Intake | Dual 120 mm fan capture — 120.0 mm fan pitch, 105 mm screw square, 6.40 × 5.00 mm mounting slots |
| Outlet | Printed male thread for the 6-inch threaded duct receiver or the blank-off cap (both sold separately) |
| Footprint (mm) | 260 × 170 × 160.2 |
| Material | PETG |
| Colour | Black or orange PETG |
| Construction | Single-piece print, no seams or fasteners in the airway |
| Design files | Open source under CC BY-SA 4.0 — 3D models download center |
| Download | STL, licence and installation guide (ZIP) — listed on the model card |
| Fulfilment | Made to order in Montreal, Quebec |
| SKU | ALT-D120-6-THR |
An interface is only useful when other people can build to it, so D-Central Technologies publishes this one. The threaded shroud, its receiver and its cap are our designs, released under CC BY-SA 4.0 at the 3D models download center — free to print, adapt and sell, thread form and all. This model’s card links the ZIP, with the STL, the licence and the installation and safety guide inside.
This listing covers the finished shroud, made to order in PETG, black or orange, in Montreal, Quebec. The D-Central fund page backs the open release work.
A receiver on every live drop and a cap in the toolbox is how a multi-machine room stays sealed while machines come and go. See the whole D-Central shroud and ducting system.
Yes. The shroud finishes in a thread rather than a duct collar, so it needs the 6-inch threaded duct receiver to take 6-inch duct, or the threaded collar cap to close it off. Both are separate parts. For flex duct pushed straight on with no mate to order, buy the plain wide-base 6-inch shroud.
Not at all. The thread form, fan pitch and screw square are shared with the 250 mm standard-base threaded shroud, so a receiver or cap fits either. The only difference is the plate: 260 mm of flange against the exhaust face instead of 250 mm, which is what you want when the duct hangs and the machine sits on rails.
Hand tight, and no further. Turn it on until it stops and leave it. Printed threads are strong in the direction they are asked to work and unhappy under a wrench, and the many turns of engagement do the holding.
Machines that share a duct run. When one miner is down, its open shroud lets the others push warm air back through the dead machine and into the room. The cap closes that path, and keeps dust off hashboards while a machine sits.
The dual 120 mm face shared by the S19 generation and the standard S21 and T21 — 120.0 mm between fan centres on a 105 mm screw square. The 140 mm machines, S21 Pro and S21 XP among them, need the S21 Pro dual 140 mm shroud family.
| Weight | 384 g |
|---|---|
| Dimensions | 26 × 16.02 × 17 cm |
| Colour | Black, Orange |
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