$38.99 CAD
Bayonet twist-lock shroud for the Antminer S19 and standard S21: dual 120 mm fans into 6-inch duct, connected and released with a quarter turn and no tools. Pairs with the 6-inch bayonet receiver. One-piece PETG, made in Montreal, Quebec.
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A quarter turn on, a quarter turn off. This bayonet twist-lock duct shroud puts a locking collar on the Antminer S19 and standard S21 dual 120 mm body, so the 6-inch duct connects and releases by hand: no clamp, no driver, no crawling behind a rack with a torch in your teeth.
It exists for a specific kind of install. Benches where machines rotate through. Heaters redirected between a workshop and a greenhouse when the weather turns. Rooms where intake filters get pulled and rinsed on a schedule. Anywhere the duct comes off often enough that a band clamp has become a small recurring argument.
Intake is the rear 120 mm fan pair on the Antminer S19, S19 Pro, S19j, S19j Pro, S19k Pro, S19 XP and the standard S21, on stock fan screws. The outlet is a 6-inch bayonet collar rather than a plain or grooved barrel, and it takes the matching Bayonet Duct Receiver 6-Inch — Twist-Lock Duct Adapter, which is the piece your duct clamps to once and then leaves alone.
If the duct goes on once and stays for a year, you do not need this: the plain Antminer S19 / S21 Dual 120 mm to 6" Duct Shroud is simpler and cheaper. The S21 Pro, S21+ and S21 XP use a 140 mm fan pair and take the Antminer S21 Pro Dual 140 mm to 6" Duct Shroud. The same twist-lock on a broader base is the Antminer S19 / S21 Dual 120 mm to 6-Inch Bayonet Quick-Release Shroud — Wide Base.
Clamp the bayonet receiver to your duct once, at the bench, where it is comfortable to work. From then on the duct engages with a push and a quarter turn and releases the same way. The lugs carry the load, so nothing depends on how hard anyone remembered to tighten a band.
Maintenance you dread is maintenance you skip. If pulling the duct means finding a nut driver and wrestling a clamp behind a hot machine, the intake filter does not get cleaned this month either, and the miner slowly chokes on its own dust. Access is not a luxury feature; it decides whether the rest of the maintenance actually happens. A bayonet is the oldest quick-release in engineering for good reason: the lugs engage across a wide area, the lock is positive rather than frictional, and the motion that connects it is the motion that seats it.
| Fits | Antminer S19 series and standard Antminer S21 — rear 120 mm fan pair |
|---|---|
| Intake | 2 × 120 mm fans |
| Outlet | 6″ bayonet-lock collar |
| Mount style | Bayonet twist-lock — quarter-turn engage and release |
| Mates with | Bayonet Duct Receiver 6″ (RCV-BAY-6) |
| Footprint | 250 × 168 × 160.2 mm |
| Material | PETG |
| Colour | Black or orange PETG |
| Construction | Single continuous body — no assembly, no fasteners, no glued joints |
| Design files | Open source, CC BY-SA 4.0 — free to download, modify and redistribute |
| Download | STL, licence and installation guide (ZIP) — listed on the model card |
| SKU | DC-SHR-BAY-D120-6 |
An interface only earns its keep if other people can build to it, so the bayonet profile is published like everything else D-Central draws: open source under CC BY-SA 4.0 at the 3D models download center, free to download, modify, print and sell. Cut the same lugs into your own fittings and they will land on this collar.
The lug geometry is D-Central Technologies’ own work, published so other people can build to it. The model card and the ZIP carry the STL, the CC BY-SA 4.0 licence and the installation and safety guide.
This listing is the finished shroud, made to order in black or orange PETG and shipped from Montreal, Quebec: the fastest way to get a twist-lock exhaust onto a machine. Orders, and D-Central’s fund page, pay for the next part in the system.
All five mount styles, both duct sizes and the matching receivers are listed in the D-Central shroud and ducting system.
The 6-inch bayonet duct receiver. You clamp that to your duct once and it becomes the half that stays on the line; from then on the connection is a quarter turn between the receiver and this collar. The lug profile also ships with the open files if you would rather cut it into a fitting of your own.
A clamp seated in a groove is the stronger joint and the right pick for a vertical run or heavy insulated duct hanging on the collar. The bayonet trades a margin of that holding force for access time. Choose by which you use more often: raw grip, or getting the line off in a second.
The lock is a quarter turn against lugs, not a friction fit, so the duct has to be rotated deliberately to release. Fan vibration pushes and pulls along the duct axis rather than rotating it. Keep the duct supported at the wall so its weight is not hanging on the collar and the joint stays put.
Intake filters need rinsing, hashboards need pulling, machines rotate through a bench, and in a house the same exhaust often heats a workshop in January and goes out a window in July. Each of those is a disconnection. The dual 120 mm intake filter ring is the other half of that habit.
If the duct goes on once and stays, buy the plain dual-120 shroud and a clamp; no reason to pay for a mechanism you will use twice. If the line comes off monthly or seasonally, the twist-lock pays for itself in avoided annoyance. Same fans, same duct size, same envelope either way.
| Weight | 357 g |
|---|---|
| Dimensions | 25 × 16.02 × 16.8 cm |
| Colour | Black, Orange |
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