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Mueller Ultra-Grind Conical Burr Grinder Professional Series, Innovative Detachable PowderBlock Grinding Chamber for Easy Cleaning and 40mm Hardened Gears for Long Life


  • Highest quality and newest technology on the market
  • Hardened alloy steel conical burr for perfect control over grind size
  • Large capacity, producing 30-32 cups of coffee
  • Gear reduction motor for slow, quiet grinding
  • Made with hardened alloy steel burrs for long-lasting use
  • Easy to clean with removable top burr and embedded cleaning brush
  • One button touch operation with auto-stop feature
  • Manufacturer’s mission to deliver superior products
Last updated on April 13, 2024 3:50 pm Details
SKU: B0833F31MS Tag:


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Buying Guide – Mueller Ultra-Grind Conical Burr Grinder Professional Series


Welcome to our buying guide for the Mueller Ultra-Grind Conical Burr Grinder Professional Series. Here, we will walk you through the essential features and benefits of this high-quality grinder, allowing you to make an informed purchasing decision.

Key Features

  • Highest Quality
  • Large Capacity
  • Precision Grinding
  • Easy To Clean
  • Mueller’s Mission

Highest Quality

The Mueller Ultra-Grind Conical Burr Grinder is designed with the highest quality and latest technology. Its hardened alloy steel conical burrs provide excellent control over grind size, ensuring uniform grinding and full coffee flavor.

Large Capacity

This grinder features a generous coffee bean hopper and a removable grounds container, allowing you to produce 30-32 cups of delicious coffee at a time. No need to worry about constantly refilling the grinder!

Precision Grinding

With its gear reduction motor, the Mueller Ultra-Grind grinds coffee slowly and quietly, preserving the rich flavor of the beans. The hardened alloy steel conical burrs, typically found in more expensive commercial machines, ensure long-lasting and trouble-free use.

Easy To Clean

Cleaning the Mueller Ultra-Grind is a breeze thanks to its innovative detachable PowderBlock grinding chamber. You can easily remove the top burr for effortless cleaning, while the embedded cleaning brush simplifies the process. Additionally, the One Button Touch operation provides convenience, with an auto-stop feature at the end of each grinding cycle.

Mueller’s Mission

Mueller Austria is dedicated to delivering superior products that enhance people’s lives. The Ultra-Grind Conical Burr Grinder is a testament to their commitment to quality and customer satisfaction.


  • Color: Black
  • Brand: Mueller Austria
  • Style: CG900-BLACK
  • Capacity: 8.5 Ounces
  • Recommended Uses: Grinding
  • Specific Uses: CG900-BLACK
  • Product Dimensions: 9″L x 4.5″W x 13.5″H
  • Item Weight: 8 pounds
  • Department: CG900-BLACK
  • Manufacturer: Mueller Austria
  • Item Model Number: CG900-BLACK
  • Discontinued By Manufacturer: No
  • Date First Available: December 24, 2019
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Set Alert for Mueller Ultra-Grind Conical Burr Grinder Professional Series, Innovative Detachable PowderBlock... - $59.99

Price History for Mueller Ultra-Grind Conical Burr Grinder Professional Series, Innovative Detachable PowderBlock...


Current Price $59.99 April 18, 2024
Highest Price $124.00 December 19, 2023
Lowest Price $53.71 November 8, 2023
Since October 20, 2023

Last price changes

$59.99 January 26, 2024
$69.99 January 24, 2024
$74.11 January 21, 2024
$91.58 January 17, 2024
$92.28 January 16, 2024

Specification: Mueller Ultra-Grind Conical Burr Grinder Professional Series, Innovative Detachable PowderBlock Grinding Chamber for Easy Cleaning and 40mm Hardened Gears for Long Life



Mueller Austria




8.5 Ounces

Specific Uses For Product


Product Dimensions

9"L x 4.5"W x 13.5"H

Item Weight

8 pounds




Mueller Austria

Item model number


Is Discontinued By Manufacturer


Date First Available

December 24, 2019

4 reviews for Mueller Ultra-Grind Conical Burr Grinder Professional Series, Innovative Detachable PowderBlock Grinding Chamber for Easy Cleaning and 40mm Hardened Gears for Long Life

4.5 out of 5
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  1. S. Bové

    Bought it during the height of the pandemic at twice the price. Many stores had no grinders available at the time. The few times we used it we were very satisfied – the cleaning is not such a joy but that’s the way with coffee and its oiliness. Now it’s not used as much but just found out there’s a court case against the company for using the Austrian flag (I checked my user manual and it says on top Müeller and Austria (in small letters) under it. The Austrian flag is right next to Müeller heading. Not sorry of purchase, just of price we paid at the time.

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  2. titolindo

    Going from a portable blade grinder that I’ve used for several years and looked for something to keep on my counter that had a bean hopper. Looked at many grinder reviews online and on Amazon for both types of burr grinders: burr edge and spherical conical. Conical burr is the type used by high end grinders.

    Common complaints in Amazon reviews are:

    Jammed coffee- designs with grind chamber at the top with a chute to the collection cup. Designs that have a chute tend to clog with ground coffee.

    Grind chamber location- designs that have the grind chamber in the main body had problems with grinds getting into the main body where the motor is housed, in worst cases filling up the main body which is bad for the unit and a waste of grinds. This design usually involves a chute too and serviceability of the chamber is not good as it is not fully removable.

    Durability- home units are not meant to grind a 2 lb bag of beans at once. Save that for the commercial grind machines at the store where you bought the beans. Home units are slower and the motors are not meant to run for more than a few minutes. They will also be made of some plastics and not all metal like a commercial unit.

    Static cling mess- I don’t consider this an issue really. I don’t think there exists a grinder that doesn’t have sone sort of mess. Stick with pre-ground coffee if you don’t want to deal with some cleanup.

    Price- you tend to get what you pay for but for the same $ the other factors can matter.

    Why I chose this grinder:
    1. Design- has the grinder away from the main body with grinds falling directly into the collection cup. No chute to clog and grinds can’t get in the motor. Only place that can clog is the opening where the beans leave the bean hopper and drops into the grind chamber. This happened once since I’ve had it which was easily resolved by removing bean hopper and grind chamber. Probably could have cleared it by tapping the unit to free the beans.
    2. Grind chamber- is fully removable for cleaning. Hefty feeling part with only concern is plastic gears to drive it. I bought this for less than $40, a really good deal at half of what it’s selling for only a month later in mid-Feb ‘23, so I bought the warranty plan if I run into problems and figured this into my buying decision.
    3. Grind timer- grinding time can be up to 90 seconds with 4 electronic settings before that. The amount doesn’t matter to me as I am using refillable pods in my Keurig.
    4. Manual grind button for espresso- it comes with an adapter that allows you to grind directly into your espresso holder. The adapter snaps onto the lower unit and pushes on a button that manually runs the grinder. I was able to use a pin to push the button so I’m thinking that if the timer or button control fails then I may be able to use the manual grind button as a backup. Again I have the Asurion warranty if needed.
    5. Price- brand name with designed by Austrian company. Brands get bought by other companies all the time so this isn’t a real factor but it can only help. Some brand names on grinders are just plain weird which to me is a negative.
    6. Width- to save counter space I preferred a narrower unit of less than 6” wide. It is a taller unit but not an issue with fitting under cabinets.
    7. A real user manual- I was pleasantly surprised it has a very good manual that is written in English with no grammar or spelling issues. The packaging was good too. There is some assembly required but the manual explains what to do.
    8. Bean holder lid has a place to hold a nice sturdy coffee scoop and cleaning brush.
    9. Static cling- after grinding I tap the sides of the grin chamber and wiggle the collection cup before removing it to cause the grinds to fall. I think this is a non issue when dealing with tiny bits of coffee or anything for that matter.
    8. Noise level- I measured it at 76db which is not too loud. It’s not quiet enough to sleep next to, so if that’s a concern then you could try grinding the night before.

    After a month of use I’m happy with this grinder and do think that the reviews are a bit underrated. I work in technology and try to DIY almost anything so I do not expect everything to work perfectly. I also have my portable blade grinder so I won’t be without coffee if something fails. I try to expect the worst and hope for the best.

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  3. titolindo

    I’m a serious espresso maker. My primary home grinder is a Mazzer that cost ~$1k, is built like a tank and has already lasted 20+ years without a single issue. This Meuller was purchased for a home-office coffee station.

    – The Austrian design is modular and unique – very cool.
    – Key components of the burr module (burrs, internal housing and bracing) is built out of metal and appears to be very well engineered.
    – Grind fineness setting wheel is large and easy to adjust – this is great!
    – When set on finest grind level, it produces perfect espresso made in a top quality espresso machine from a variety of top quality beans.
    – For the price (here on Amazon, less than $100), assuming it lasts a year or three, it is a TOTAL BARGAIN and easily competes with grinders costing multiple $hundreds.
    – Grind time for a normal double espresso-size porta-filter load ~13 seconds, a bit slower than the Mazzer, but perfectly acceptable.
    – It has a switch below the grinder head that enables activation of the motor simply by pressing the porta-filter into position (really great!).
    – The design allows grinding straight into a porta-filter without using a bin & dosage lever (as in the old style Mazzer). This means every dose is freshly ground on the spot with no mixing with old grind in the hopper. This is 100% excellent for low-volume home situations.
    – The design enables a typical porta-filter to be held right up against the base of the exit port, so nearly 100% of the grind goes INTO the porta-filter – nearly zero waste. Love this!
    – Bonus: it’s pretty quiet and the noise is a lower-rumbling as opposed to the higher pitch often associated with smaller grinders. Very easy on the ears.

    – The external case sections made of plastic do not inspire long-term confidence…but for the price, what can one expect. Just don’t drop it or knock it over.
    – The tall lean/clean design is cool, but may be a bit taller than some will like for under-cabinet positions.
    – The narrow base is also cool in terms of space use; however, as anyone who grinds knows, coffee gets out/around the area below *any* grinder feeding into a porta-filter, so…this one will make some mess outside the base area. Small issue.
    – The plug wire is kind’a short (~2 feet). Can see how this could be great in some installations where a short cord is desired; however, in others this could force use of a small extension cord.
    – The hopper docking mechanism is interesting but has a flimsy spring loaded locking system that must be treated with kid gloves. One of the two screws holding this mechanism together vibrated out in a few days of use (I found it while doing a quick inspection of the hopper chute between coffee reloads). The threads were stripped, so I just left this out for now and was able to re-dock the hopper without it, but will probably put it back in and secure it with lock-tite. If this screw had somehow gone into the burrs, it would have caused major damage. Fortunately, this is NOT something you will need to interact with regularly…in fact you may never have to remove the hopper once you assemble the machine.

    Meuller has a great product here. In future versions they could really up the game by:
    – fixing the hopper docking screw problem – this is obviously an easy fix.
    – making a more expensive version with an all-metal housing – for $200 it would be worth every penny.
    – the linkage between the motor and the burrs is indirect (either geared or belt driven) from the upward facing motor in the metal-housed rear base. This linkage could, over time, be a problem, but so far seems solid. In a Mazzer or other super-high-end grinder this linkage is always direct due to high torque being transferred to the burrs. In this design, direct linkage was impossible and the benefit was extremely compact & convenient ergonomics (burrs feed direct into porta-filter without a “chute”)…So, just make sure the linkage between the motor and the burrs is built to last (it may be already)!

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  4. Caracu

    This grinder is a tank and has been working daily for about 3 years. Feels solid – much more so than other consumer brands.

    Only made a weird noise once, cleaned it, and back to normal operations without having to take apart the housing. Hopefully, it’ll work for several more years. It’s not a vintage Singer metal sewing machine or KitchenAid blender, that lasts forever with simplistic assembly and disassembly for maintenance.

    Amazon sent out an email of a class action settlement. The case was about an Austrian flag deceiving consumers. I recall that the description stated this grinder was designed in Austria. As far as I’m concerned if a product works this well, it could be made by prisoners in a Siberian gulag. Unfortunately, these lawsuits may cause the price to go up. The current price is still fairly affordable.

    If the grinder ever does fail and can’t be repaired, I wouldn’t hesitate to buy another. The other grinders I’ve tried were several levels below the quality and reliability of this one at a similar price point.

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    Mueller Ultra-Grind Conical Burr Grinder Professional Series, Innovative Detachable PowderBlock Grinding Chamber for Easy Cleaning and 40mm Hardened Gears for Long Life
    Mueller Ultra-Grind Conical Burr Grinder Professional Series, Innovative Detachable PowderBlock Grinding Chamber for Easy Cleaning and 40mm Hardened Gears for Long Life


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