Frequently Asked Questions
Grinder Design & Materials
What are the grinders made of?
Our grinders are built from high-quality, durable materials. The body and internal components are primarily aluminum, while the burrs come in two standard options: stainless steel, or stainless steel with a red titanium coating for smoother, more consistent grinds. The grind chute and cup are food-safe plastic. We also offer our exclusive metal dosing cup available in two sizes to fit the most common portafilters: 54 mm (fits most Breville machines) and 58 mm (most other espresso machines). Bellows are made of silicone, and lids is wood. Every material is chosen for durability, performance, and safety.
What burr options are available, and what are the differences?
Most of our grinders come with two standard burr options: stainless steel and Red Titanium burrs. The stainless steel burrs offer excellent all-around performance and clarity, while the Red Titanium coating provides added durability, smoother grinding, and more consistent particle distribution.
For 64mm burr platforms (like the DF64 or DF64V), we also offer SSP burrs - premium aftermarket burrs known for their precision machining, unique geometry, and distinct flavor profiles tailored to espresso or filter brewing.
What’s the difference between flat and conical burr grinders?
Flat and conical burrs grind coffee differently, leading to distinct flavor profiles and preferences:
- Flat burrs (used for example in the DF54, DF64, and DF83) produce a very uniform particle size, resulting in high clarity, separation of flavors, and a clean, balanced cup. They’re often preferred for light to medium roasts and specialty for “third wave” coffee styles.
- Conical burrs (coming soon with the DC63) create a wider particle distribution, which tends to emphasize body, sweetness, and a more blended flavor profile. This style often appeals to those who enjoy traditional espresso or darker roasts.
Both designs can produce excellent espresso and filter coffee. The best choice depends on your taste preference and roast style.
What are the differences between different burr sizes (54 mm, 64 mm, and 83 mm), and how do they affect grinding?
Burr size affects grind speed, consistency, and heat management. These are all crucial for getting the most out of your coffee:
- 54mm burrs (DF54): The perfect entry-level option for home users. Compact and efficient, they grind quickly and consistently, handling espresso, filter, and a wide range of brewing styles with ease.
- 64mm burrs (eg DF64): A versatile and popular home platform. The larger burr diameter provides improved grind consistency and clarity across all brew styles. The 64mm platform also supports a wide variety of aftermarket burrs from brands like SSP and LeBrew, allowing users to tailor the grind profile and flavor characteristics to their preferences.
- 83mm burrs (eg DF83V): Large-format burrs deliver the highest possible grind quality and consistency for home use. The increased cutting surface means the burrs spend more time cutting and less time mashing, producing a cleaner, more uniform grind. Larger burrs also generate less heat during grinding, reducing the risk of heat degradation and preserving more of the coffee’s delicate aromatics and flavor notes. The 83mm platform also has numerous high-end burr options available and are perfect for home users who want to extract the absolute best from their beans.
Overall, as burr size increases, grind quality, consistency, and speed all improve, while heat generation decreases, protecting bean quality. Smaller burrs are ideal for entry-level users and frequent grind adjustments, the 64mm burrs offers the best blend of performance and flexibility, and 83mm burrs deliver top-tier grind precision and flavor clarity for enthusiasts chasing the highest cup quality possible.
Do I need to season my burrs?
Burr seasoning isn’t strictly required, but it can help your grinder reach optimal performance faster. New burrs have microscopic machining marks that smooth out over time as coffee passes through. After grinding a few pounds of beans (or running seasoning beans through), the burr edges settle, leading to slightly faster grinding, lower retention, and more consistent particle size.
Why do some grinders retain coffee grounds, and how is this one different?
Many grinders trap leftover coffee inside the burr chamber or chute, a problem known as retention. This leftover coffee can mix with fresh grounds, leading to inconsistent dosing and stale flavors. Our grinders are designed for near-zero retention, featuring a short, direct chute, a tilted burr chamber that naturally helps grounds exit the grinder, and a bellows system that pushes out the last remaining particles. The result: what you grind is exactly what you brew, ensuring freshness and consistency every time.
Grind Quality & Performance
Can I use the grinder for both espresso and filter coffee?
Absolutely! All of our grinders can handle both espresso and filter coffee. By default, they come with a more espresso-focused (but still versatile) burr, ideal for fine, precise espresso grinding. For those who primarily brew filter coffee, we also offer “brew” burrs specifically designed to produce a more unimodal grind distribution, optimizing extraction for pour over, drip, or immersion methods. All our grinders feature stepless adjustment, making fine-tuning your grind size quick and intuitive. Plus, they are designed primarily as single-dose grinders, so you can switch between espresso and filter settings without having to clear the grind chamber, perfect for experimenting or frequent grind changes. For guidance on setting the perfect grind size for your brewing method, check out our grind size guides.
Why spend $300 or more on a coffee grinder when cheaper options exist?
The main difference is grind quality and consistency. High-end burr grinders produce precise, uniform coffee particles that allow for even extraction and better flavor clarity - essential for espresso. Cheaper grinders, like blade grinders or entry-level conical burr models, often create uneven particle sizes and excessive fines, leading to bitter or sour-tasting coffee. Many of them also can’t grind fine enough for true espresso, no matter how long you run them. Premium grinders offer stronger construction, better burr alignment, smoother operation, and long-lasting performance making them a worthwhile long-term investment.
Is the Ross Droplet Technique (RDT) safe for my grinder?
Yes! When done correctly, the Ross Droplet Technique (RDT) is safe for your grinder. Lightly misting beans, adding a couple of drops of water and shaking, or making the palm of your hand damp and covering the container while shaking helps reduce static and clumping. In general, shaking to evenly distribute the water after applying it is the most effective approach.
A few tips to ensure safety:
- Apply water to the beans, not the grinder - always treat the beans in a separate container before adding them to the hopper. Never add water directly into the grinder itself.
- Use only a small amount of water – the beans should be slightly damp, not wet.
- Feed beans slowly – as with normal use, this helps prevent overloading the burrs and motor.
RDT can be a helpful routine adjustment to improve your coffee experience without harming your grinder.
How do I keep my grinder working in optimal condition?
To keep your grinder performing at its best:
- Clean it regularly – Remove and clean the hopper, burrs, and grind chute regularly to prevent coffee oil buildup and clogs. Use a soft brush or cloth and avoid harsh chemicals.
- Routine – Small adjustments can make a big difference:
• Feed beans slowly to avoid overloading the burrs and motor (this also improves consistency).
• “Hot start” the grinder by turning it on and letting it reach full speed before adding beans to help prevent jams.
• Use the Ross Droplet Technique to reduce static and clumping. - Deep Clean Occasionally - Depending on usage, run grinder cleaning pellets or perform a full deep clean to remove residual grounds from hard-to-reach areas.
- Proper Placement - Keep your grinder on a kitchen countertop or other stable surface that is dry and not subject to major fluctuations in temperature or humidity. This helps protect the components and maintain consistent performance.
For troubleshooting tips, see below or reach out to our support team.
Ordering, Shipping & Returns
What can I expect for order processing and shipping times?
We strive to pack and ship all orders within 1 to 2 business days of purchase. This can rarely be impacted during special circumstances. Most deliveries arrive within 2–7 business days, depending on factors like location and shipping volume. Please note that delivery times may be impacted by weekends and holidays. If you have any concerns about your shipment or it hasn’t arrived within the expected timeframe, we’re always here to help - please reach out to our support team.
Where do you ship from?
All orders are shipped from our Mississauga, Ontario warehouse. Orders typically leave within 1–2 business days, and shipping times vary depending on your location. We use reliable domestic couriers, regularly track shipments and audit our couriers for late or lost packages to keep them accountable and minimize any shipping issues.
Can I return my grinder if I change my mind?
Yes. New, unopened grinders can be returned for a full refund within 365 days of delivery, and opened items can be returned within 60 days, provided they’re clean, complete, and in good condition. Return shipping costs are the responsibility of the customer.
To start a return, email support@dfgrinders.ca with your order number and item details - please wait for authorization before sending anything back. If you’re unsure whether a grinder is right for you, don't hesitate to reach out before purchasing - we’re happy to help you choose the best fit.
For full and up-to-date details on return eligibility, restocking fees, and non-refundable items, see our Returns & Refunds Policy.
Do grinders come with a warranty?
Yes! All of our grinders come with a standard 1-year warranty covering manufacturing defects and mechanical failures under normal home use. We handle all warranty support directly, so you won’t have to deal with overseas manufacturers.
For extra peace of mind, we also offer the Premium Protection Program, which extends your warranty to 2 or 3 years. If you run into any issues, simply make a warranty claim with your order number and we’ll help troubleshoot or arrange a repair or replacement as needed.
For details, see our coverage Terms and Conditions.
Single Dose Grinding
What is a “Single Dose Grinder”?
A single dose grinder is a grinder designed to grind only the exact amount of coffee you plan to use immediately, rather than storing beans in a hopper for extended periods. This approach has several benefits:
- Fresher coffee - Grinding only what you need preserves the coffee’s flavor and aroma.
- Better consistency - You can adjust grind settings for each dose without old beans affecting the results.
- Easier dialing in - With no beans retained in the hopper, adjusting between grind sizes is simpler and more precise.
- Reduced retention - There are fewer leftover grounds in the grinder, making cleanup easier and reducing waste.
Single dose grinders are popular among home baristas and specialty coffee enthusiasts who want maximum control over grind quality and freshness.
What is the best workflow for using a single dose grinder?
For optimal results with a single dose grinder, follow this workflow:
- Measure your beans - Weigh the exact amount of coffee you need using a scale.
- Turn on the grinder - Give it a few seconds to reach full speed before adding beans.
- Add beans - We recommend feeding the beans slowly into the grinder for consistent grinding.
- Pump the bellows - With the grinder still running, use the bellows to help move grounds through.
- Transfer grounds - Once all beans have been ground, transfer the coffee from the dosing cup to your portafilter, filter or other brewing device.
- For espresso: distribute, tamp, and brew - Evenly distribute the grounds, tamp, and brew your coffee.
Following this workflow ensures consistent extraction, minimal retention, and optimal flavor.
What are the most important accessories for single dose grinding?
For single dose grinding, the only essential accessory is a coffee scale that measures to 0.1 g, ensuring you dose coffee accurately for each shot.
Other recommended accessories to make your workflow smoother and more consistent include:
- Tamp mat - Protects your countertop and provides a stable surface for tamping.
- Metal dosing cup - Further reduces static and makes it easier to transfer grounds from the grinder to your portafilter.
- Distribution tools (for espresso) - Options include WDT (Weiss Distribution Technique) tools, leveler distributors, or other devices to help evenly distribute grounds before tamping.
Using these accessories helps improve consistency, reduce waste, and streamline your single dose workflow.
What is the bellows for, and do I need to use it every time?
The bellows is designed to clear any remaining grounds from the grind chamber and chute, reducing retention and ensuring every dose is accurate. We recommend using it every single time you grind, even for single shots. Just a few quick puffs after each grind keeps your grinder clean, maintains consistent dosing, and makes switching grind sizes easier.
Why should I use a shaker cup to shake my espresso grounds after grinding?
Shaking your espresso grounds after grinding is one of the simplest and most effective ways to improve extraction consistency. By evenly redistributing the grounds before tamping, shaking helps create a puck with uniform density and resistance to water flow - reducing channeling and leading to a more balanced, even-tasting espresso.
You can check out our dosing cups that include a lid shaker lid, designed specifically for this purpose, here.
What is “hot starting” my grinder, and why does it help?
“Hot starting” is a simple routine adjustment that can reduce clogs and improve grind consistency. It means turning on your grinder and letting it reach full speed before adding beans.
Why it helps:
- Prevents jams - When the burrs are already spinning at full speed, beans feed more smoothly and are less likely to jam the motor.
- Improves consistency - Beans are ground evenly because the burrs are at optimal speed from the first bean.
- Reduces stress on the motor - Avoids overloading the grinder with a sudden bean load when starting from zero speed.
How to hot start:
- Turn the grinder on without adding beans.
- Wait 1–2 seconds (until it reaches full speed).
- Add your measured dose of beans slowly.
What is “hyper alignment” and is it necessary?
Hyper alignment refers to aligning the grinder burrs so that they are perfectly parallel to one another. The goal is to ensure the burrs meet evenly across their entire surface, which can improve grind consistency. In short:
- Most grinders are manufactured with burrs already close to parallel, and slight deviations rarely affect everyday espresso or brew performance.
- Hyper alignment is mostly of interest to enthusiasts or professionals who are grinding at the very limits of precision and consistency.
- For typical use, keeping your grinder clean, dosing correctly, and performing routine maintenance is more important than hyper alignment.
- Attempting hyper alignment can risk damaging burrs or the adjustment mechanism if done incorrectly.
Bottom line: Hyper alignment is not required for normal home or cafe use; it’s an advanced tweak for those seeking maximal precision.
Troubleshooting
My grinder won’t start or only makes a humming noise.
- Confirm the outlet works and the breaker hasn’t tripped.
- Try setting the grind coarser. Sometimes beans left in the chamber can jam the motor.
- If the grinder has been used heavily, let it cool for 15–30 minutes before trying again.
- Check for clogs in the chute and perform a full cleaning to clear out compacted grounds if necessary.
My grinder runs, but nothing comes out.
- Turn the dial coarser and pulse the motor to clear jams.
- Check for clogs in the chute and perform a full cleaning to clear out compacted grounds if necessary.
The adjustment dial is stuck or very hard to turn.
- Run the grinder while gently moving the dial back and forth to free trapped coffee.
- If that doesn’t help, remove the collar/dial, clean the threads, and apply food-safe grease before reassembling.
- Be careful to ensure that the threads properly align when reassembling. It should not require force to get the threads started.
- Contact support if the dial remains stuck.
I’m seeing a lot of retention (grinds left behind).
- Pump the bellows after each grind session while the motor is still running.
- Brush out the chute regularly.
- If buildup continues, remove and clean or replace the declumper.
My grinder clogged.
Clogging usually happens when grounds build up in the chute or burr area. Here’s how to clear it and prevent it in the future:
Clearing An Existing Clog
- Remove any compacted grounds, especially in the chute. Clumps often form in a specific area. You can follow this guide for instructions. Use a skewer or brush to gently break up clumps and thoroughly clear the chute.
- For a deeper clean, follow this video. If your grinder is already clogged, skip the grinder cleaner step initially. After cleaning, you can run grinder cleaner through the machine, followed by some beans to clear any residue.
- If you don’t have grinder cleaner, 20–30 g of dry rice can be used in the same way to remove buildup.
Preventing Clogging
Clogs are usually caused by a combination of factors including beans, cleaning, and routine. Here are a few tips:
- Beans - Darker roasts and flavored coffees are oilier and more prone to clumping.
- Cleaning - Brush the chute and ionizer probes weekly. You can also pump the bellows while running the grinder empty, or vacuum the chute to remove buildup.
- Routine adjustments:
• Feed beans slowly to avoid overloading the burrs.
• “Hot start” the grinder by letting it reach full speed before adding beans.
• Use the Ross Droplet Technique to reduce static and clumping.
By following these steps, most clogging issues can be resolved and prevented.
My grinder is messy with too much static and clumps.
- Static is more common in dry climates and with lighter roasts.
- Brush out the chute - blocked ionizer probes will not reduce static properly.
- Try the Ross Droplet Technique (RDT): lightly wet beans with water before grinding. You can use a spray bottle with 1-2 sprays, stirring the beans with a damp spoon or wetting the palm of your hand and shaking them in a container.
- Feed beans in slowly instead of dumping them all at once.
Why doesn’t the zero mark on my dial match the actual burr touch point?
Slight variations in manufacturing can account for differences in the “true zero” or burr touch point. The DF54 comes with a fixed dial indicator arrow and the numbers on the dial act as reference points to adjust from one grind size to another. If you would like adjustability in your indicator arrow, you can purchase our Premium Dial Indicator as an upgrade for your DF54.
I hear scraping or “burr rub.”
- Move the dial slightly coarser from zero.
- Clean out any coffee trapped between burrs and make sure the burr carrier is seated evenly.
- Tighten burr screws, be careful about not to over-tighten.
My shots are inconsistent or my grind quality seems uneven.
- New burrs can take about 5–10 lbs of coffee to season. Consistency improves with use.
- Be sure not to pump the bellows while the coffee is actively grinding. Instead pump them with the grinder still running, but once you hear all of the coffee has run through.
- Retention or static may be the culprit. Purge with the bellows, clean the chute, and try the Ross Droplet Technique (RDT).
- Very high-volume use or hitting a stone can dull or chip burrs - inspect and replace if needed.
- Burr alignment is rarely required, but some users shim or adjust if they want the absolute most precise grind. For instructions on hyper alignment, you can find tutorials online. If done properly, this process will not cause any damage to the grinder, however, please note that we do not take responsibility for any damage to your grinder from attempting this.
I can’t grind fine enough for espresso.
- Find the “true zero” or burr contact point by turning the grinder on and slowly adjusting the grinder finer until you hear the faint chirping from the burrs making contact. Then back off and use our Grind Size Guides to estimate your espresso range from true zero.
- Clean and re-seat the burrs to ensure they arre flat.
- Use the Ross Droplet Technique (RDT) with oily or very light roasts to improve feed.
- Double-check your basket size, dose, bean age, and tamping technique - grind size is not the only factor in extraction.
I can’t grind coarse enough for pour over or French press.
- If you are using espresso burrs, expect extra fines. For clarity in pour over, consider brew-specific burrs.
- Check the declumper. A clogged or bent declumper can slow output and cause fines.
My grinder moves on the counter while grinding.
Movement usually comes from dust or coffee under the feet. Clean the counter and the rubber feet so the grinder sits firmly.