Description
Every 3D printing failure has a cost, and the cost is rarely the filament. It is the twelve hour print that stopped at eighty percent, the spool that ran out at hour nine, the colour change you talked yourself out of because re-threading the whole PTFE path sounded like a twenty minute job. The waste is time, and time is the only material a print farm cannot buy back.
The Splice Line is a 37mm PTFE connector with a 1.8mm inner diameter and a 2.6mm outer diameter: the exact bore that 1.75mm filament passes through without drag and without play. You cut the PTFE tube, seat a connector, and join two lengths of filament or two lengths of tube in a straight line. No re-threading the extruder. No scrapping a part that was already six hours into a nine hour print. The 3DSWAY branding matters here because bore tolerance is the whole product: a connector that runs two tenths of a millimetre wide introduces wobble at the melt zone, and wobble shows up as surface artefacts on the finished part.
Sold in trays of 100 or 200, these are consumables in the honest sense. Print farms keep a bin of them next to the spool rack, because the moment you need one is the moment you cannot wait for one. The PTFE body is chemically inert and heat stable, so it does not degrade against the hot end the way a printed or generic plastic splice would.
A print that finishes is worth more than a filament that is cheaper.
What The Bore Tolerance Buys You
- ✦ 1.8mm inner diameter matched to 1.75mm filament with no drag and no play
- ✦ 2.6mm outer diameter that seats in standard PTFE tube fittings
- ✦ 37mm body length for a straight, aligned splice
- ✦ PTFE construction: chemically inert and stable against hot end temperatures
- ✦ Joins filament ends or repairs a cut PTFE tube without re-threading the extruder
- ✦ Tight bore tolerance to avoid wobble at the melt zone
- ✦ Supplied in 100 piece and 200 piece trays as a working consumable
- ✦ Restores a paused print instead of scrapping it
Technical Specifications
- Brand: 3DSWAY
- Type: PTFE filament connector / tube joint
- Inner diameter: 1.8mm
- Outer diameter: 2.6mm
- Length: 37mm
- Material: PTFE
- Filament compatibility: 1.75mm filament
- Pack sizes: 100 pieces, 200 pieces
- Function: Filament splice and PTFE tube repair
- Application: Bowden and direct drive extrusion paths
Who Keeps Them In Stock
Print farms use them as spool-change hardware: splice the tail of one spool to the head of the next and keep printing. Hobbyists use them to salvage the last metre of a colour they will not buy again. Maintenance technicians use them when a Bowden tube has been cut too short during a hot end swap and a replacement tube is days away, which is the scenario where a two dollar part saves a week of downtime.
Printer Questions
What filament diameter does this fit?
1.75mm filament. The 1.8mm bore gives clearance for the filament without the play that a wider bore would introduce.
Can I use this to join two PTFE tubes?
Yes. It is a straight connector for both filament splicing and tube repair, and the 37mm length keeps the joint aligned.
Will the splice pass through my extruder?
A spliced filament joint can pass through most paths, but feed it by hand through the extruder gears rather than letting the motor pull a cut end into the drive. Trim the filament ends square before joining.
Is PTFE safe at hot end temperatures?
PTFE is stable well beyond the operating range of standard hot ends, which is why it is the material used for tube liners in the first place.
How many should I keep on hand?
Print farms keep a hundred in stock. A single spool change can consume one, and the cost of not having one is a failed print.
Are these reusable?
They are consumables. A connector that has been used to join filament can be reused for a tube repair, but treat them as stock rather than as a tool.






The EastSupplier Promise
We buy the way a workshop buys: one supplier, one standard, no surprises at the port. Every listing is inspected before it is packed, documented in English, and shipped with a real person on the other end of the message. If a piece arrives wrong, damaged, or simply not as described, we replace it or refund it. You are not buying a lottery ticket with a tracking number.
Questions on bulk quantities, mixed pallets, or recurring supply? Write to us and a human answers within one business day.
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