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Printing worthy of an Oscar

Here is Oscar3D: The nozzle with the red ruby and highest precision bore for excellent premium printing. Especially suited for ambitious end users. Oscar3D is the latest innovation from Oskar Moser, the specialist for glittering technology and customised precision nozzles. What can we develop for you?

Precision by the metre

Oscar3D is impressive in every respect: with excellent inner and outer values.

  • High precision: Nozzle bore with 10 µm tolerance
  • Super fast: Ultra heat-conductive brass
  • Optimum flow: Nozzle channel free of turbulence
  • Highly heat-resistant and durable: Form-fitting ruby bezel
  • Clean & easy to maintain: Exquisitely polished surface
  • Connector-friendly: Suitable for E3D-Hotend

No replacing. No fumbling. No compromise: Oscar3D

24 variants for true 3D printing versatility

Oscar3D stands for versatility: There are two product lines: ECO with wide tip for large material application. And VARIO with fine tip for filigree prints. The two lines both include many variants, so that the premium nozzle Oscar3D really masters all situations and requirements. Oscar3D is always suitable.

ECO-Line

The ECO line is ideal for robust and stable printing results. An optimal ironing effect is achieved with the wide tip.

Available in the following configurations:

Hot-End connection:
Short Stroke (E3D Standard)
Long Stroke (E3D Volcano)

Filament diameter:
Ø 1,75mm
Ø 2,85mm

Nozzle diameter:
0,4mm
0,6mm
0,8mm

Oscar3D ECO technical drawing

VARIO-Line

The VARIO line has a very fine tip that makes it particularly suitable for small contours and precise printing results.

Available in the following configurations:

Hot-End connection:
Short Stroke (E3D Standard)
Long Stroke (E3D Volcano)

Filament diameter:
Ø 1,75mm
Ø 2,85mm

Nozzle diameter:
0,4mm
0,6mm
0,8mm

Oscar3D VARIO technical drawing

Knowledge makes everything even better

The topic of FDM 3D printing is very complex – here is an in-depth look at the technical details.
Not just for freaks and nerds!

FDM 3D printing may seem trivial, but in reality it is very complex…
We are focused on nozzles each and every day, and therefore know that the technical details and the associated knowledge make all the difference! That is why we want to share our accumulated experience with you below and also provide you with tips on how to handle Oscar3D ruby nozzles. We hope that this will answer a lot of the questions that may arise prior to use and also offer a better understanding of the nozzle's technology.

Ruby. It is a gemstone and one of the world's hardest materials.
Thanks to these outstanding technical properties, this material is extremely resistant to wear and therefore ideally suited to meet the challenges presented by printing abrasive materials, such as filaments filled with metal or carbon. While "regular" brass or steel nozzles evaporate following just a few hundred grams of abrasive material, the ruby tip from Oscar3D holds firm. No wear can be detected at the nozzle tip even after several kilograms, which means that neither the nozzle distance to the heated bed has to be adjusted nor does the nozzle have to be replaced.

  • Guaranteed nozzle diameter
    For each nozzle, we guarantee the most precise nozzle diameter (featuring a tolerance of just +10µm to the nominal size) available on the market. Even the hardest available printing materials do not widen it, which ensures that your printing quality is consistent.
  • Adapted design
    An Oscar3D is comprised of just two parts: The ruby tip and a brass nozzle body. A special characteristic is that the nozzles do not feature a modular design. Instead, we have a separately adapted nozzle body for each variant – from the stroke and the filament diameter to the nozzle diameter. That requires a large economic cost because we have to store more so-called variant parts for each model. However, the technical benefits outweigh the expenditure: There are no fluidic dead spaces and isolated air chambers caused by joints between the components within the nozzle. In addition, there is a more stable thread cross section at the connecting thread.
  • Optimal thermal flow
    There is no question that ruby serves as an insulator. That is why the ruby of the nozzle was reduced to a minimal size. Together with the design referenced above and a tightly entwined rim inside of the nozzle body, this results in an optimal thermal flow all the way to the nozzle tip.
  • Polished nozzle tip
    With the help of a diamond grinding paste and a soft cotton polishing wheel, each nozzle tip is highly polished, cleaned, degreased and placed in the packaging by hand using gloves. That allows the nozzle to be cleaned externally using a paper towel and it also minimises material deposits.
  • Proven quality
    We place a major emphasis on craftsmanship. Defined processes ensure safety and our 100% outgoing goods inspection guarantees that each nozzle meets our high quality standards.

These are models that describe the structure of the Oscar3D VARIO SS 1.75 0.4 and reflect our underlying design.

Isometric view of schematic cut-away model
Isometric view of schematic cut-away model
Schematic cut-away model with simulation of the flow speed of a filament
Schematic cut-away model with simulation of the flow speed of a filament
Half-section of a schematic cut-away model
Half-section of a schematic cut-away model
Schematic cut-away model of the half-section of the nozzle tip
Schematic cut-away model of the half-section of the nozzle tip
Excerpt of a flow speed simulation
Excerpt of a flow speed simulation

Generally, there are two Oscar3D versions: ECO and VARIO.
ECO has a wide tip, which slips over adjacent print webs when printing and prevents the material flow, which bulges in all directions, from going up. This forces the material to spread out to the sides and to more intensively connect with the adjacent webs. In addition, the webs are traversed from above. This leads to an increased component strength.

The downside is that it is more difficult to print the first layer because, due to the larger surface of the nozzle tip, it is more likely to stick to it and can detach from the heated bed more easily. Due to the friction between the wide nozzle surface and the print webs, a printed image is created that is generally more uneven. We recommend ECO for technical prints that are less about optics and more about mechanical strength.

The VARIO features a more "classic", pointed design with a regular nozzle. We recommend using VARIO for optical prints that are less about mechanical strength and more about beautiful designs.

Below you will see the results of a tensile test. Here, using the same settings, samples were printed and then examined with regard to their strength. First using an ECO and then a VARIO. In this case, an average increase of strength of approx. 6% was achieved.

It should be noted here that the objective was merely to establish the difference between ECO and VARIO prints with regard to the increase of their component strength when using the same settings. The ECO can definitely achieve higher component strength increases if the printing parameters are optimised in that regard. For example, this can be achieved by changing the so-called "extrusion multiplier", which can be used to further increase the material flow and allows print webs to bond better.

Below you can see images of test components created by both nozzle variants from different vantage points. The differences of the printed images of an ECO and a VARIO can be easily recognised.

Photo of the tensile specimens for the test (VARIO in front and ECO in the back)
Photo of the tensile specimens for the test (VARIO in front and ECO in the back)

Printed image comparison, top (VARIO below/ECO above)
Printed image comparison, top (VARIO below/ECO above)

Printed image comparison, lateral wall (VARIO below/ECO above)
Printed image comparison, lateral wall (VARIO below/ECO above)

Basic parameters of the test:
Printer: PRUSA I3 MK3
Material: ColorFabb XT CF-20
Nozzles: Oscar3D ECO SS 1.75mm 0.4mm
Oscar3D VARIO SS 1.75mm 0.4mm

Heated bed temperature 90°C
Print head temperature 275°C
Layer thickness 0.15mm
Filling 100%

Tensile test according to DIN EN ISO 527-2:2012-06
Test specimen Type 1B
5 specimens for each nozzle variant

ECO: 30.3 MPa, 76 MPa according to the manufacturer
VARIO: 28.9 MPa, 76 MPa according to the manufacturer

Professional users can download the material data sheet, the complete test report, the model of the tensile test and all print parameters using G-code:

We recommend using a torque wrench with a hexagon socket bit, a wrench size of 7 and a tightening torque of 2Nm +/-0.5Nm. A moderate tightening by hand also does not pose a problem: an Oscar3D is tough enough for that as well!

The Oscar3D is designed for the so-called "E3D-Hotend", which has established itself as a key standard. You can find a detailed technical drawing here:

Oscar3D ECO technical drawing
Oscar3D VARIO technical drawing

Generally, the nozzle can also be installed in printers without an original E3D-Hotend. In these cases, it may be possible that small changes to the printer, such as offsetting the Z-stop sensor, have to be made or that the nozzle has to be adapted manually, for example on a lathe.

Printing enhanced (and in particular fibre-filled) filaments poses a special challenge because the nozzle tends to be clogged in these cases or does not supply the desired printed image. The reason is that the filament contains special additives!

Printing fibre-filled filaments is especially tricky, because, for example, the length, thickness, quantity, distribution and quality of fibres in the filament string influence the flow behaviour in the liquefied filament in the nozzle a lot. It is possible that the flow behaviour appears to be inhomogeneous or that the nozzle clogs completely.

That is why we recommend that you initially proceed with care when printing using fibre-filled filaments and, after installing an Oscar3D, that you first use conventional materials such as PLA or PETG to gain some experience.

It is the same as with any new purchase, whether it is a new PC, the new home cinema or a new car: You don't go full throttle right away or don't open all programs at once. Instead, you carefully try out the new technology.

Ideally, in a second step, you can experiment with a metal-filled filament. Due to the spherical shape of the additive, metal-filled filaments (as opposed to fibre-filled filaments) tend not to clog as much and are therefore better suited to slowly work toward the printing of enhanced filaments.

Then, as a final step, you can try fibre-filled filaments. Whenever possible, we tend to recommend the use of larger nozzle diameters (from 0.6 mm) to avoid material flow problems from the start. The important thing here is the relative ratio between fibre size and nozzle diameter: The larger the nozzle bore is, the less susceptible it is to the possible influences of the fibres contained in the material. The nozzle is less likely to clog and the material flow is more homogeneous. Finally, you should not skimp on the filament itself. While quality and price are not always linear, the chance of getting high-quality filaments is much higher in the case of more expensive products.

Generally, due to the insulating effect of the ruby, we suggest to operate the nozzles at a temperature of 10°C – 20°C higher than the melting point recommended by the manufacturer of the filament. In addition, the print speed during the first attempts should not be greater than 40 mm/s in order to ensure a good fusing of the material.

Should the nozzle clog anyway, we recommend cleaning it using the so-called "cold-pull process", which consists of the chemical loosening of the material, or via chemical cleaning with special cleaning needles. Since ruby is a very spry material, in order to prevent spalling at the tip of the nozzle, the utmost care is required when carrying out mechanical cleaning using a needle. We do not ever recommend applying an open flame to the nozzle.

We hope that we were able to help you to a certain degree and that we answered some queries or solved problems ahead of time. If you still have questions, suggestions, criticism or maybe even want to offer praise, we are always available at info@oskar-moser.de! Otherwise, we wish you a lot of fun when printing in the future – and an Oscar-worthy result!

Order directly – we have the right variant for you!

Oscar3D is ready for you: Open up new opportunities today with excellent premium printing.

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