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Adapter: Euro RB to Uni UMR-109 (Adjustable Length 3d printed

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Red Processed Versatile Plastic
Adapter: Euro RB to Uni UMR-109 (Adjustable Length 3d printed
Adapter: Euro RB to Uni UMR-109 (Adjustable Length 3d printed

Not a Photo

Adapter: Euro RB to Uni UMR-109 (Adjustable Length

Ships as soon as 9 days
3D printed in pinkish red, richly colored nylon plastic with a smooth finish.

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Product Description
I present my pen refill adapter, for use in pens that take the Euro Rollerball type refill. It allows such pens to use Uni UMR-109 refills (not included) or other similar 98-99mm long plastic tube type refills instead.
The Euro RB refill is around 111mm long and 6.3mm in diameter. The Uni UMR-109 refill is around 99mm long and 3.1mm in diameter.

The Euro Rollerball refill doesn't have a well-defined standard size and different manufacturers make their refills in slightly different lengths. This refill has been designed to be adjustable, using an M3 x 6mm long socket screw (not included), inserted into the adapter's tail.

Other suitable refills include:
Ohto - G-95NP, No.99(X)NP
Pilot - BVRF-(X)

Uni - SXR-89-(XX), UMR-109-(XX)
Zebra - EK-(XX), NJK-(0.X)

I appreciate that the Uni UMR-109 refill is generally a less practical refill, compared to the Euro RB, in terms of ink volume and manufacturer diversity. Especially considering that the popular Pilot G2 gel refill is close enough in size to often be interchangeable with the Euro Rollerball refill. However, these 98-99mm refills also come in many more varieties of ink, from oil-based, to gel, emulsion and hydrid, so this adapter exists to hopefully provide flexibility, between your favourite pens and refills.

The adapter needs to be printed in the polished white or coloured plastics, as the smooth polished finish is functionally desirable. The refill is held in place, by the adapter, using friction. The holes around the side of the adapter are present to help with the removal of unbonded plastic powder from the core, when being polished. However, some powder may still need to be removed, with a pin or thin metal rod, before inserting the refill.

Due to the very varied nature of pen design, I cannot guarantee that this adapter will work with any specific pen, although I've made every effort to make it as universal as possible.  The neck of the Uni UMR-109 refill is wider than the Euro RB (3.1mm vs 2.5mm), so this may be an issue in some pen bodies.

I plan to make as many refill types compatible with as many host pens as possible, so If you have any suggestions on refill adapters, please let me know and I can hopefully make it available, depending on the relative sizes involved. I have now created dimensioned drawings of over 80 standard and obscure ballpoint, gel and rollerball refill types, so I like to think that I have a fair idea of what is and isn't possible.
What's in the box:
Euro RB To Uni UMR-109 Adapter 02b
0.62 x 8.57 x 0.62 cm
Switch to inches
0.24 x 3.37 x 0.24 inches
Switch to cm
Success Rate:
First To try.
What's this?
Mature audiences only.


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