How it connects
The flexible fabric cuff slips over the cylindrical male spigot or flange of an exhaust fan or blower, and the integrated drawstring is pulled tight and knotted or clamped to secure and seal it by radial friction.
Male and female halves
Female socket sleeve; slips over an external rigid cylindrical male spigot or flange (blower port or duct connector).
Usually connects to
- utility blower spigot
- portable ventilator exhaust/intake collar
- round duct end collar
- blower fan shroud
Common sizes
- Typically 6 in to 24 in (150 mm to 600 mm) inner diameter, matching standard portable utility blower and industrial ventilator spigots.
Where it is used
confined space ventilationportable exhaust blowerstemporary HVAC and dryingindustrial and construction ventilationmining air ducting
Variations
- Drawstring cuff with eyelets
- Integrated hem cinch rope
- Belted cuff (with adjustable strap and buckle)
- Zipper cuff
How to recognise it
Identified by an unreinforced, flexible fabric or PVC sleeve extending past the duct wire helix, featuring an end hem or eyelets through which an adjustable cord or drawstring passes.
Often confused with
| Confused with | How to tell them apart |
|---|---|
| Circular Duct Female | Circular Duct Female is a rigid sheet-metal female sleeve meant to receive a crimped sheet-metal duct, whereas a drawstring cuff is soft, flexible coated fabric that cinches around a spigot. |
| Belted Duct Cuff | Belted cuffs use an integrated heavy-duty strap with an adjustable buckle or ratchet rather than a rope drawstring or cinch cord. |
Also called
drawstring cuffcinch cuffsoft cuff with adjustable ropeblower duct cinch collar
Good to know
Commonly found on portable PVC flexible ducting used with industrial axial fans and utility blowers. Often paired with an end ring, zipper, or belt on the opposite end.
Design with real parts
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