Opus Conical Burr Grinder Gear Guide

Ready to grind with Opus? Check out our Gear Guide.

Included with the Opus Conical Burr Grinder is the Get to Know You Guide that walks through all of the grinder’s features. Cleaning and maintenance instructions are found in the Safety Manual.

Watch Nick T., VP of Hardware and R&D at Fellow and Certified Q Grader, walk through how to clean and maintain Opus here.

Exterior: We recommend using a non-abrasive damp cloth to wipe down the exterior and load bin of Opus.

Exit Chute/Anti Static: The anti static technology will work best for about 60 cycles before it needs to be cleaned to operate at its peak performance. To clean it, remove the catch cup, and use the Fellow cleaning brush (or another cleaning brush such as a clean makeup brush or a clean paint brush) and “swipe” around the inside of the exit chute (where the coffee grounds come out). This will clean the chute and help the anti-static mechanisms work well. 

Burrs: Take the load bin off, remove the outer burr, and brush the burrs with the Fellow cleaning brush (or another cleaning brush such as a clean makeup brush or a clean paint brush).

Opus arrives with:

• Safety manual & use guide
• Get to Know You Guide
• Opus
• Load bin lid
• Catch cup
• Catch cup insert for portafilter dosing

Watch an Opus unboxing video, featuring Andrew H., Product Design Manager at Fellow!

By default, the power button on Opus comes with a timed auto stop. This means that Opus will stop automatically.

How to use the default timed auto stop: Single short press to grind for 30 seconds, double short press for 60 seconds, and triple short press for 90 seconds. Long press to grind for a full 2 minutes. When finished, Opus turns itself off automatically.

If you’d like to deactivate the timed auto stop feature, you can activate manual mode. This means that, with one press of the power button, Opus will continue to run for two full minutes (120 seconds) unless you stop it manually by pressing the power button again.

To activate Manual Mode:

• Unplug Opus. 
• Hold the power button while plugging Opus back in. 
• You will hear three short beeps, indicating that the Opus is in Manual Mode. 

To deactivate Manual Mode (go back into Standard Mode):

• Unplug Opus. 
• Plug Opus back in without holding down the power button. 
• You will hear one short beep, indicating that Opus is in Standard Mode.

Opus has 41 settings on the outer adjustment ring, which can be seen when looking directly at Opus. This ring can adjust between numbered settings from 1 to 11. Between each numbered setting are 4 minor increments, allowing you to set your grind setting by increments of 0.25. With this setup, there are technically 120 positions on Opus.

Underneath the load bin is a blue ring that allows you to get between the 4 minor increments in the outer ring. That’s what we mean by “41+”!

Learn more about the inner adjustment ring and how to use it here.

This is the inner adjustment ring! Learn more about how to use it here.

Opus has 2 grind adjustment rings: an outer ring and an inner ring. Use these rings to set your optimal grind size. To see what settings we recommend for common brew methods, see the grind guide inside of Opus’s load bin lid. You can also find the grind guide in the Get To Know You Guide and your Opus Gear Guide.

The outer ring

The outer ring can be seen when looking directly at Opus. This ring can adjust between numbered settings from 1 to 11. On this outer ring, 1 is the finest setting and 11 is the coarsest. Between each numbered setting are 4 minor increments, allowing you to set your grind setting by increments of 0.25. 

The inner ring

Inside Opus, there is a second inner adjustment ring. You can access the inner ring by removing the load bin. Use the inner ring to:

• Enable micro adjustments on the outer ring. By adjusting the inner ring by one notch, you shift the range of the outer ring by 2/3 (.667) of a notch. Because the outer ring is measured by increments of 1/4 (0.25), utilizing the inner ring enables Opus to get between those increments by 1/6 of a measure.

If you really want to geek out: One outer ring adjustment is equivalent to 50 microns of burr height movement. With the inner ring design, you can split those outer adjustments into 3rds, allowing for 16.7 microns of burr adjustment throughout the range.

• To expand the grind range on Opus. By adjusting the inner ring all the way to the one end or the other, you enable the outer ring to reach setting “0” (1 full setting finer than 1) and “12” (1 full setting coarser than 11). This is because there are a maximum of 6 notches on the inner ring, and 6 inner notches is equivalent to 1 full outer setting.

• To calibrate Opus as the burrs wear down. With prolonged use, the burrs may start to output coarser grinds. To adjust for this, you can slowly shift the inner ring to a finer setting. Though the burrs are built to last for the lifetime of the product, burr wear is natural.

How to adjust the inner ring:

• Ensure the load bin is empty.

• Rotate the outer ring until it is centered at setting 6.

• Remove the load bin by twisting it counterclockwise until it unlocks from the grinder, then lift away. The blue inner ring should now be visible.

• With your thumb and index finger, press down with even pressure on the two exposed tabs of the calibration ring to compress the spring-loaded mechanism. Keep pressing until you feel the ring bottom out.

• With the inner blue ring pressed down, use your other hand to rotate the outer ring in either direction, which will change where the arrow is pointing on the inner ring scale (counterclockwise towards the “-” is finer, clockwise towards the “+” is coarser).

• Each notch on the inner ring is equivalent to 2/3 of a minor increment on the outer ring. Each minor increment is 0.25, so each inner ring notch is equivalent to ⅔ * ¼ = ⅙ of a numbered setting. There are a total of 6 notches on the inner ring in either direction.

• When you’ve reached the desired setting, release the calibration ring so it springs back up and engages with the grind adjustment ring. Rotate the grind adjustment ring to ensure the calibration ring rotates with it again.  

•Finally, reinstall the load bin.

Watch Hardware Product Manager Andrew walk through how to install and calibrate your new burrs here.

Walk through how to grind for espresso with Opus in the Get To Know you Guide.

In order to register your Fellow electric product, please submit this form. Registering your Opus Conical Burr Grinder will extend your warranty by one additional year.

Registration is only eligible for products purchased in the United States on or after June 29, 2021.

The anti-static technology will work best for about 60 grinding cycles before it needs to be cleaned to continue to operate at its peak performance. 

To clean it, remove the catch cup, and use the Fellow cleaning brush (or another cleaning brush such as a clean makeup brush or a clean paint brush) and “swipe” around the inside of the exit chute (where the coffee grounds come out). This will clean the chute and help the anti-static mechanisms work well. 

Watch Nick T., VP of Hardware and R&D at Fellow and Certified Q Grader, walk through how to clean and maintain Opus here.

Yes! Opus can grind for all brew methods, from the finest espresso for a true 9-bar shot all the way to the coarsest coffee for cold brew. Learn more about the recommended grind ranges for different brew methods on our Gear Guide and in the Get to Know You Guide found in the box.

Opus is made to grind for all brew methods, from espresso to cold brew. Ode is built to dominate brewed coffee, which means that Ode is not suitable for espresso.

No, parts from Opus and Ode are not interchangeable and are not cross-compatible.

Opus was made with sweat, tears, hundreds of pounds of coffee beans, and an incredible amount of tenacity by the entire Fellowship. Opus does not contain PFAS or Teflon. All materials in the coffee grinding/food path are food-safe and FDA approved.