Automatic O-Ring Seal Feeding and Assembly Machine for Pipe Fittings WM-9318

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The WM-9318 seats an O-ring on a pipe fitting in one cycle, rated by the factory at one piece per cycle in under 1.5 seconds. The ring side is fully automatic — a vibratory bowl inside the cabinet orients loose O-rings and queues them along a feed rail, pneumatic jaws stretch each ring open, and a mist of oil is applied before the ring goes on. The fitting side is manual: the operator presents each body to the lower chuck, which is why the factory classifies the machine as semi-automatic. It is a closed floor-standing cabinet on four levelling feet with key-locked service doors, a front pressure gauge, an emergency stop and a touchscreen piece counter, and it runs on shop air at a constant 0.8 MPa or more.

Specifications

Key features

• The ring is handled entirely by the machine — oriented in the bowl, queued on the rail, stretched open by the jaws and lubricated in the same cycle, so nothing depends on how carefully an assembler picks and rolls a ring on by hand
• Oil mist before fitting is a separate function on the screen, not a bolt-on drip — a wetted ring slides over the shoulder instead of dragging, which is where scrap comes from when rings go on dry
• One piece per cycle in under 1.5 seconds keeps the machine waiting on the operator rather than the other way round, so the loading rhythm is the only thing you have to plan around
• Closed cabinet with key-locked side doors — the bowl, the rail and the pneumatics sit behind sheet steel instead of open on a bench, and levelling feet let it stand on an uneven shop floor
• Touchscreen counter with reset, a manual mode and single commands for ring feed and oiling — enough to set the machine up, prove a part and train an operator without a laptop
• Runs on nothing but clean shop air at 0.8 MPa and up; no hydraulics and no fixture change between shifts once the tooling is set for the part family

What it processes

• Metal pipe and quick-connect fitting bodies that need an O-ring seated in a groove — as pictured, zinc-plated connector bodies with a black ring behind the head
• Small metal bodies outside plumbing as well — as pictured, lock cylinders supplied with keys, each carrying a sealing ring in a turned groove
• Job-shop and mixed-batch work where several part numbers share one bench and a fully automatic cell cannot be filled by a single part
• Benches where rings are still fitted by hand and the scrap is rolled, twisted, nicked or missing rings

Suited for: putting an O-ring on a metal pipe fitting one piece at a time, with the ring fed, oiled and seated by the machine and the fitting loaded by hand, in a closed cabinet that stands on the shop floor and needs only clean air at 0.8 MPa.

Not suited for: running unattended. As soon as the fitting bodies themselves have to be fed, this is the wrong class of machine — the WM-9312 automatic O-ring assembly machine with O-ring oiling station bowl-feeds bodies and rings onto a rotary indexing turntable at around 3,600 pcs/hour and unloads defective parts by itself, and where the part needs a second assembly operation after the ring, the five-station WM-9311 fully automatic O-ring assembly machine is the platform instead. Also not suited for: sealing a thread with PTFE tape rather than a rubber ring — that is the WM-461 automatic PTFE thread seal tape winding machine, which wraps ZG and NPT threads from 1/8 to 2 inch; and rubber seals that slide onto a wire before crimping belong to the WM-377 double-end wire seal insertion and crimping machine.

Where the WM-9318 sits next to the benchtop WM-9314

Both machines leave the part in the operator’s hands and do the ring themselves, so the choice is about the cabinet, the lubrication and the cycle, not about the principle.

The WM-9314 semi-automatic O-ring assembly machine is a benchtop box, 500 × 460 × 300 mm, that plugs into a 220 V socket and is rated by its factory at about 1,000 pieces an hour with a peristaltic pump wetting the ring. It goes on the bench beside the assembler and moves when the work moves.

The WM-9318 is a floor cabinet. Its rating is written as a machine cycle rather than an hourly output — one piece per cycle in under 1.5 seconds — and its ring is lubricated by an oil mist that is fired before the ring is pushed on. The two ratings are not measured the same way, so we will not tell you on paper that one is faster than the other; what we will do is time your own fittings on both and give you the two figures.

Pick the WM-9318 when the machine is going to stand in one place on a production floor, when the fittings are metal bodies rather than bench-scale adapters, and when you want the ring lubricated as a spray rather than a dosed drop. Pick the WM-9314 when bench space, a wall socket and portability matter more.

Two things the factory has not published for this model: overall dimensions and the electrical supply. We do not print numbers we have not been given — ask for them in your enquiry and they come back confirmed, along with the trial-run result on your own fittings and rings.