Bayonet Duct Receiver 6-Inch — Twist-Lock Duct Adapter

Description

Bayonet duct receiver for 6-inch duct — the twist-lock half

This 6-inch bayonet duct receiver is the duct-side half of D-Central’s twist-lock connection, and it exists for one job: getting the duct off a miner without touching a clamp. One end is a bayonet socket that drops onto the collar of a D-Central 6-inch bayonet shroud and locks with 60 degrees of rotation. The other end is the flex-over spigot used across the whole ducting line — clamp land at 150.4 mm, retention bead crest at 152.4 mm, 145.6 mm through-bore.

Everybody who runs an ASIC at home learns the same lesson the first time a fan dies: the duct is in the way. Tape comes off, a clamp gets backed out, and the run sags while the machine is on the bench. The receiver is set up once, clamped to the duct, and left there. After that the machine leaves the run with a quarter turn by hand.

Both bayonet shrouds in the line carry geometrically identical collars, so one receiver serves either of them — entry, lock angle and pull-off engagement are the same part to part.

What it fits — bayonet shroud collars and 6-inch flex duct

• The collar of the Antminer S19 / S21 Bayonet-Lock Shroud — Dual 120 mm to 6″.
• The collar of the Antminer S19 / S21 Dual 120 mm to 6-Inch Bayonet Quick-Release Shroud — Wide Base. One receiver serves both mounts.
• 6-inch flex duct, which slips over the spigot and clamps on the 150.4 mm land.
• Any 6-inch rigid run downstream, once the flex is on the spigot.

A bayonet shroud does not take plain duct on its own. The locking tabs on its collar are shaped to catch this receiver and nothing else — that is the whole point of a quick-disconnect. Shroud and receiver are designed as a pair and bought as a pair. If you would rather screw the duct on than twist it, the Threaded Duct Receiver 6-Inch — Screw-On Duct Adapter does the same job on a thread. If you do not want a quick-disconnect at all, the Antminer S19 / S21 Dual 120 mm to 6″ Duct Shroud carries a plain flex collar you clamp to directly.

How it installs

1. Slide your 6-inch flex duct over the spigot end until the core passes the retention bead.
2. Seat a worm clamp on the 150.4 mm land, behind the bead, and tighten. That clamp is now permanent.
3. Present the receiver square to the shroud collar, push it home against the tabs, and twist 60 degrees to the stop.
4. To take the machine out of the run, twist back and pull. The duct, the clamp and the rest of the run never move.

Why the twist-lock earns its place

A hose clamp is a fine permanent joint and a poor removable one. Every cycle of loosening and retightening bites the flex core in the same place, and the clamp screw ends up on the wrong side of the duct against a wall. The bayonet moves the removable joint off the duct entirely and puts it on a rigid printed interface designed for repeated cycling: a straight entry, a helical ramp that pulls the two halves together as you rotate, and a detent at 60 degrees that holds the joint under the pull of a hanging duct. The clamp still does what clamps are good at — sealing flex to a spigot, once.

• Disconnect a ducted miner by hand, with no tools and no tape.
• Keep one clamped flex connection for the life of the run instead of re-clamping every service.
• Serve either bayonet shroud with a single part — the two collars are geometrically identical.
• Land on the same flex-over spigot as the rest of the line, so your clamps and duct stock carry straight over.
• Hold the joint under load through a positive 60-degree detent, not friction.
• Resist ASIC exhaust heat in PETG, which stays stiff where PLA goes soft.

Specifications

Open source — print it yourself, or buy it finished

D-Central Technologies designed this receiver in-house. The socket, the helical ramp and the 60-degree detent are our geometry, drawn here and open-sourced here — not a remix of anyone else’s file — and it is released under CC BY-SA 4.0 through the 3D models download center, free to download, modify, remix and sell. Its own card is the 6-inch bayonet receiver model. We would rather the whole mining world had a working quick-disconnect than that we owned one.

The file itself is dual_120_to_6in_bayonet_receiver.zip, holding the STL, the CC BY-SA 4.0 licence and the installation and safety guide. This listing is the finished part instead, made to order in PETG and shipped from Montreal, Quebec, in black or in D-Central orange. The download is free today and stays free; buying the printed receiver, or giving through D-Central’s fund page, is what pays for the next design in the line.

Works with

• Antminer S19 / S21 Bayonet-Lock Shroud — Dual 120 mm to 6″
• Antminer S19 / S21 Dual 120 mm to 6-Inch Bayonet Quick-Release Shroud — Wide Base
• 6″ Duct Coupler
• 6″ 90° Duct Elbow (Compact)
• 6-Inch Flex Duct Window Vent Port

Browse the whole run, shroud to window, in the D-Central shroud and ducting system.

Frequently asked questions