$38.99 CAD
Bayonet quick-release shroud for the Antminer S19 and S21: the 6-inch duct joint twists apart by hand, with no clamp and no tools. Wide 260 mm base; pairs with the 6-inch bayonet duct receiver, 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 bayonet twist-lock duct adapter is for the operator whose machines do not stay put. Hashboard swaps, fan replacements, seasonal rerouting, a rack shuffle — each one means breaking the duct joint, and doing that with a hose clamp means a nut driver, a dropped screw and a duct end that gets a little more chewed every time. This shroud hoods both 120 mm exhaust fans of an Antminer S19 or standard S21 and finishes in bayonet tabs instead of a plain collar: the joint twists apart by hand, with nothing to loosen and nothing to lose.
It works as a pair. The 6-inch bayonet duct receiver stays on your 6-inch duct run, the shroud stays on the machine, and the break happens between them. The tabs stand wider than plain 6-inch duct and are not meant to take it directly — the receiver is the mating half, sold separately so a shop can keep one per duct drop.
If you would rather not add a second part to the order, the plain plain wide-base 6-inch shroud takes flex duct straight onto its collar. For a joint that is tool-free but holds on a thread rather than a quarter turn, look at the wide-base threaded shroud. The same bayonet on the 250 mm flange is the standard-base bayonet shroud.
Every duct connection has a part that takes the abuse of being made and unmade. On a clamped joint that part is the duct itself: the band bites the same spot each time, the spiral wire deforms, and eventually the end has to be cut back. A bayonet moves that wear into two printed faces that are cheap and orderable, and the joint lands in the same place every time it is made — a clamped duct is only as square as whoever tightened it last.
| 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 | Bayonet twist-lock tabs for the 6-inch bayonet duct receiver (sold separately); not a plain-duct collar |
| Footprint (mm) | 260 × 168 × 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-BAY |
A twist-lock is only useful if both halves agree, so D-Central Technologies publishes both. The bayonet shroud and its receiver are our designs, released under CC BY-SA 4.0 at the 3D models download center, where anyone can take the interface, build around it and sell the result. The card for this model links the ZIP: STL, licence, installation and safety guide.
This page is for the finished shroud, printed to order in black or orange PETG in Montreal, Quebec. The files stay free; the order, or the D-Central fund page, is what pays for the next interface.
Order the receiver with the shroud — on its own, the shroud has no duct interface. See the whole D-Central shroud and ducting system.
No. The bayonet tabs stand wider than 6-inch duct and are shaped to engage a receiver, not to be gripped by a band. Order the 6-inch bayonet duct receiver with it, or choose the plain plain wide-base 6-inch shroud if you want duct straight onto a collar.
Twisting a joint apart puts torque into the mounting flange, and the 260 mm plate spreads that across the exhaust face, which is why this is the version to reach for if the duct comes off often. The standard-base bayonet shroud is for racks where 250 mm is all the width the machine spacing allows.
One per duct drop, not one per machine. The receiver lives on the run, so a rack position can accept any machine wearing a bayonet shroud, so shops usually end up with more shrouds than receivers.
The tabs engage on ramps and lock against a shoulder, so the joint carries load in shear rather than on friction. As with any shroud in this line, support the duct at its first bend rather than hanging a whole run off the machine face.
Anything presenting two 120 mm exhaust fans 120.0 mm apart on a 105 mm screw square: the S19 generation, the standard S21, the T21. Machines that moved to 140 mm fans, including the S21 Pro and S21 XP, use the S21 Pro dual 140 mm shroud.
| Weight | 377 g |
|---|---|
| Dimensions | 26 × 16.02 × 16.8 cm |
| Colour | Black, Orange |
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