Bitcoin accepted at checkout | Ships from Montreal, QC, Canada | Expert support since 2016
$38.99 CAD
A worm-drive band clamp on a smooth collar will slide if the duct gets pulled. This version cuts a dedicated seat into the collar so the clamp has something positive to sit in, with a reinforcing band around the groove so the collar does not become the weak point.
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A worm-drive band clamp on a smooth collar will slide if the duct gets pulled. This version cuts a dedicated seat into the collar so the clamp has something positive to sit in, with a reinforcing band around the groove so the collar does not become the weak point.
Same rear 120 mm fan pair intake as the rest of the dual-120 family — Antminer S19 series and standard S21. Not for the S21 Pro or XP. The 6-inch collar carries a circumferential groove sized for a standard worm-drive duct clamp.
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.
Slide the duct over the collar, seat the band clamp in the groove, tighten. The clamp cannot walk off the end and the duct cannot creep under load, which matters if the run is vertical, if it gets bumped, or if anyone is ever going to move the machine while it is still connected.
Ducting fails at its joints, and it fails at the joints because someone tugged the flex duct while carrying the machine. A groove turns a friction joint into a mechanical one. The reinforcing band exists because cutting a groove into a wall thins it — this revision puts the material back.
| Fits | Antminer S19 series and standard Antminer S21 — rear 120 mm fan pair |
|---|---|
| Intake | 2 × 120 mm fans |
| Outlet | 6″ collar with band-clamp groove |
| Footprint | 250 × 157 × 165 mm |
| Material | PETG |
| Construction | Single continuous body — no assembly, no fasteners, no glued joints |
| Design files | Open source — free to download, use, modify and redistribute |
| SKU | DC-SHR-CLG-D120-6 |
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.
See the full D-Central shroud and ducting system for the compatibility matrix and sizing guide.
A standard worm-drive duct clamp sized for 6-inch duct. Any hardware-store band clamp in that range will seat in the groove; you do not need anything proprietary.
At the joint, yes — a clamp seated in a groove is a mechanical stop rather than pure friction. The groove itself is reinforced with a band of extra material so cutting it does not weaken the collar.
| Weight | 270 g |
|---|---|
| Dimensions | 25 × 15.7 × 16.5 cm |
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