Wheels for a 3D printer are a small but critical part on which the print quality, positioning accuracy and durability of the entire device depend. Many users pay attention to the extruder, nozzle or firmware, forgetting that worn or unsuitable wheels can cause layering, layer displacement, and even printer failure. The problem is especially pressing for models with open kinematics (for example, Prusa i3, Ender 3 or Anet A8), where the wheels are in direct contact with the aluminum profiles.
In this article, we will look at what types of wheels there are for 3D printers, how to choose them correctly for a specific model, when it’s time to change them, and how to replace them yourself - without making mistakes that lead to new problems. You will also find out what materials and coatings wheels cope better with vibrations, and why cheap analogues can result in expensive repairs.
If your printer begins to “walk” along its axis, makes a squeaking sound, or leaves marks on the profiles, the wheels are most likely to blame. But don’t rush to change them: sometimes the problem is solved by simply adjusting the eccentrics or cleaning the guides. We will tell you how to diagnose a malfunction and avoid common mistakes.
Types of wheels for 3D printers: what they are and how they differ
All wheels for 3D printers are divided into three main types in design and material. The choice depends on the kinematics of the printer, budget and requirements for printing accuracy.
The most common - V-shaped wheels (or V-slot wheels). They are designed to work with aluminum profiles like V-slot (for example, 2020, 2040). Their key advantage is self-leveling due to the wedge shape, which reduces backlash and vibration. However, such wheels require precise adjustment of the eccentrics, otherwise the printer will “bounce” when moving.
Second type - flat wheels (or flat wheels). They are used in printers with smooth guides (e.g. Creality CR-10 or Tevo Tarantula). Their main advantage is ease of installation and low price, but they cope less well with lateral loads, which can lead to layer displacement at high printing speeds.
Third option - linear bearings (or linear bearings). These are not wheels in the classical sense, but they perform the same function. Bearings provide minimal friction and high precision, but require perfectly straight guides and regular lubrication. Most often they are installed on printers with rail guides (for example, HIWIN or THK).
- 🔹 V-shaped wheels: best choice for V-slot profiles, but require configuration
- 🔹 Flat wheels: budget option for smooth guides, but less precise
- 🔹 Linear bearings: maximum accuracy, but difficult to maintain
Also the wheels differ in material: Polyurethane wheels with metal rim (PU wheels) are considered the optimal solution for most printers - they are silent, wear-resistant and do not scratch profiles.
Cheap plastic analogues wear out quickly and can become deformed at high temperatures (for example, if the printer is located next to a heating table).
How to determine when it's time to change your wheels: 5 signs of wear
Many users wait until the printer stops printing smoothly, but this is a mistake. Worn wheels not only spoil the print quality, but also accelerate the wear of the guides, extruder and even stepper motors. Here are the key symptoms that it’s time to think about replacement:
1. Vibrations and "jitter" of the printer when moving along the axes. This is a sign that the wheels have lost their round shape or the eccentrics have become loose. Especially noticeable at high print speeds.
2. Creaking or strange sounds when moving the carriage. Most often caused by friction between worn plastic and metal.
3. Layer Offset during printing, even if all belts are tensioned. This occurs due to play in the wheels, which is not compensated by the eccentrics.
4. Visible marks on profiles (scratches, grooves or metal dust). This means that the wheels no longer slide, but “cut” the guides.
5. Uneven wear wheels - one wears out faster than others. This indicates frame misalignment or incorrect eccentric adjustment.
⚠️ Attention: If deep grooves appear on the profiles, replacing the wheels alone will not be enough - grinding or replacing the guides will be required. Otherwise, the new wheels will quickly become unusable.
To check the condition of the wheels, remove the carriage from the axle and spin each wheel by hand. If you feel backlash, unevenness or wheel jams - It’s definitely time to change it. Also inspect the surface: high-quality wheels should not have cracks, chips or bald spots.
How to check eccentrics?
If the wheel is difficult to spin even after the eccentric is loosened, the problem may be a deformed profile or contamination. Try cleaning the guides with alcohol and lubricating them with silicone grease (DO NOT use WD-40 - it attracts dust!).
Dimensions and compatibility: how to choose wheels for your printer model
One of the most frequently asked questions: "Which wheels are suitable for my printer?". The answer depends on three key parameters:
1. Guide type (V-slot, smooth, rail).
2. Profile size (for example, 2020, 2040, 1515).
3. Wheel diameter and width (usually specified in the format diameter × width, for example, 20×8 mm).
Below is a compatibility table for popular printer models:
| Printer model | Guide type | Recommended wheels | Size(D×W) |
|---|---|---|---|
| Creality Ender 3 / Ender 3 Pro | V-slot 2020 | V-shaped PU | 20×8 mm |
| Prusa i3 MK3S+ | V-slot 2020 | V-shaped with metal rim | 20×10 mm |
| Creality CR-10 | Smooth guides | Flat PU | 16×8 mm |
| Anet A8 | V-slot 2020 | V-shaped plastic | 16×8 mm |
| Tevo Tornado | Smooth + rail (Z-axis) | Flat PU+linear bearings | 16×8 mm / LM8UU |
If your model is not in the table, measure:
- Groove width on the profile (for V-slot).
- Diameter old wheel (you can use a caliper).
- Thickness guide (for example, at a profile 2020 wall thickness - 2 mm).
Please note fastener: Most wheels are fixed to eccentric bushings (for example, MR105ZZ or 624ZZ). If the bushing is worn, it will also have to be replaced. Some Chinese printers use non-standard mounts - check this before purchasing.
When purchasing wheels for Ender 3 or CR-10 take a set with a reserve - often a set includes 4 wheels, but for a complete replacement on both axles you need 8 pieces.
Step-by-step instructions: how to replace wheels on a 3D printer
Replacing wheels is not a complicated process, but it requires care. Errors at this stage can lead to carriage skew, increased play or even breakage of the guides. Follow the instructions and check each step.
What you will need:
- 🔧 A set of hexagons (usually
2 mmand2.5 mm) - 🔧 Pliers or eccentric wrench
- 🔧 Silicone grease (for example, Super Lube)
- 🔧 Wipes and alcohol for cleaning profiles
Step 1: Removing the old carriage
1. Turn off the printer and disconnect all cables from the carriage (endstops, fans, extruder).
2. Loosen the belt (if it is in the way) and carefully remove the carriage from the guides.
3. Place it on a flat surface to avoid losing small parts.
Step 2: Removing old wheels
1. Loosen the eccentric nuts (usually they are marked with red or blue plastic).
2. Pull out the hub with the wheel. If the wheel is stuck, WD-40 will help (but then be sure to clean the profile with alcohol!).
3. Check the condition of the eccentrics - if the threads are worn out, replace them.
Step 3: Install new wheels
1. Place the new wheel onto the hub and secure it with the circlip (if equipped).
2. Insert the bushing into the carriage and lightly tighten the eccentric (not all the way!).
3. Repeat for all wheels.
Step 4: Adjusting the Cams
1. Place the carriage back on the guides.
2. Adjust the eccentrics one by one until smooth running without play:
- The wheel should easy to rotate by hand.
- The carriage should not “dangle” when rocking.
3. Check the travel along the entire length of the axle - if it sticks somewhere, loosen the eccentric and repeat the adjustment.
Step 5: Final Check
1. Turn on the printer and manually move the carriage along the axes (via the menu or Pronterface).
2. Listen: there should be no squeaks or knocks.
3. Run a test print (for example, cube 20×20×20 mm) and check for layering.
⚠️ Attention: If, after replacing the wheels, the printer begins to “walk” more than before, check parallelism of guides. It is possible that the profile shifted when removing the carriage. Use a square or laser level for leveling.
☑️ Checklist before the first print after changing wheels
Wheel materials and coatings: which is best for precision and durability
Not only their service life depends on the material of the wheels, but also print quality. Cheap plastic wheels may seem like a good savings, but in practice they wear out quickly, accumulate dust and require frequent replacement. Let's look at the main options:
1. Plastic wheels (POM, Delrin)
- ➕ Cheap, lightweight, do not scratch profiles.
- ➖ They wear out quickly (especially under high loads), and can become deformed from heat.
- 🔹 Suitable for budget printers with low print speeds (for example, Anet A8).
2. Polyurethane wheels (PU)
- ➕ Silent, wear-resistant, dampen vibrations well.
- ➖ More expensive than plastic ones, they can “stick” to profiles in high humidity.
- 🔹 Optimal choice for most printers (e.g. Ender 3, Prusa i3).
3. Wheels with metal rim
- ➕ Maximum strength and accuracy, do not deform.
- ➖ Heavy (increase the load on the engines), can scratch aluminum if configured incorrectly.
- 🔹 Used in professional printers (for example, Voron).
4. Rubber wheels
- ➕ Soft, silent, well absorbent.
- ➖ They wear off quickly and can leave marks on profiles.
- 🔹 Suitable for lightweight carriages (for example, in delta printers).
Selection advice:
If your printer operates in high humidity or dusty environments, give preference to PU wheels with metal core - they are less susceptible to deformation. For high speed printing (over 100 mm/s) avoid plastic wheels - they cannot cope with loads.
Polyurethane wheels with metal rim (PU + Aluminum) is the best balance of price, durability and accuracy for most FDM printers.
Common mistakes when changing wheels and how to avoid them
Even experienced users sometimes make mistakes that ruin all efforts to replace wheels. Here are the most common mistakes and ways to prevent them:
1. Uneven tightening of eccentrics
- If one wheel is tightened more than the others, the carriage will be skewed. This leads to uneven wear and vibrations.
- ✅ Solution: Tighten the eccentrics one by one, checking the carriage movement after each.
2. Using the wrong lubricant
- WD-40 or machine oil attracts dust and quickly turns into an abrasive.
- ✅ Solution: Use silicone grease (for example, Super Lube) or dry Teflon.
3. Ignoring the state of the guides
- If the profiles are bent or grooved, new wheels will wear out quickly.
- ✅ Solution: Before replacing wheels, check the guides square and, if necessary, sand with fine sandpaper (P1000).
4. Buying wheels without taking into account the load
- Wheels for Ender 3 not suitable for heavy type printer CR-10 S5 - they will simply break.
- ✅ Solution: Check maximum load on the wheel (indicated in the specifications).
5. They forget about calibration after replacement
- New wheels may shift the position of the carriage slightly, which will lead to misalignment of axes.
- ✅ Solution: After replacing, be sure to run auto calibration (if available) or check manual axis calibration.
- 🚫 Do not use wheels from unknown brands - they often have inaccurate geometry.
- 🚫 Do not lubricate wheels with lithol or grease - these lubricants thicken over time.
- 🚫 Don't ignore creaking after replacement is a sign of incorrect settings.
If, after replacing the wheels, the printer begins to print in waves, check the tension of the belts - they may have become loose when removing the carriage.
Alternatives to Wheels: When to Consider Linear Guides
Wheels are not the only option for moving the carriage. In some cases it is advisable to switch to linear guides (for example, HIWIN or MGN12). This is relevant if:
- Your printer runs at high speeds (> 150 mm/s).
- You are printing at high resolution (0.1 mm and thinner).
- Wheels wear out too quickly (for example, during 24-hour printing).
Advantages of linear guides:
✔ Minimal play and vibration.
✔ Last longer without maintenance.
✔ Better cope with lateral loads.
Cons:
✖ More expensive than wheels (a set of guides for Ender 3 will cost 3000–5000 ₽).
✖ They require a perfectly flat frame (otherwise they will jam).
✖ More difficult to install (new holes need to be drilled).
If you decide to upgrade, consider:
- For axis X guides are usually used MGN12 (12 mm).
- For axis Y — MGN9 or HIWIN HGR15.
- Will be required new fasteners for the carriage (often sold complete with guides).
Example of transition to linear guides:
On Creality Ender 3 it is popular to replace wheels with MGN12 for X axis and HIWIN HGR20 for the Y axis. This increases accuracy, but requires modification of the frame (strengthening the fastenings).
⚠️ Attention: When installing linear guides on a printer with a plastic frame (such as Anet A8) be sure to reinforce it with metal corners. Otherwise, the frame may become deformed under the weight of the carriage.
FAQ: Answers to frequently asked questions about wheels for 3D printers
🔹 Is it possible to use wheels from furniture or office chairs?
No. Furniture wheels are not designed for precise work and high loads. They wear out quickly, have a lot of play and do not fit standard 3D printer profiles. An exception is some models with bearings 624ZZ, but they will still have to be modified.
🔹 How often do you need to change your wheels?
Service life depends on the material and intensity of use:
- Plastic wheels: 3–6 months during active printing.
- PU wheels: 1–2 years.
- Wheels with metal rim: 2–3 years and more.
Signs for replacement: vibrations, squeaking, visible wear or shifting of layers during printing.
🔹 Why do new wheels squeak?
The squeak is usually caused by one of three reasons:
1. The eccentrics are too tight - loosen them until the wheel begins to rotate freely.
2. Dirt on the profiles - Clean the guides with alcohol.
3. Incompatibility of materials — some PU wheels “stick” to aluminum in high humidity. Try lubricating with silicone grease.
🔹 Is it possible to print without wheels, on bearings alone?
Technically yes, but this is fraught with problems:
- Bearings without wheels profiles wear out faster (especially aluminum ones).
- Increases backlash, which leads to displacement of layers.
- The load on stepper motors increases as friction is higher.
If you want to give up wheels, it’s better to immediately switch to linear guides (HIWIN or MGN).
🔹Which wheels are best for Creality Ender 3 V2?
For Ender 3 V2 optimal choice:
- V-shaped PU wheels 20×8 mm with a metal rim (for example, Misumi or OpenBuilds).
- Alternative: wheels with double bearings (for example, 624ZZ) for greater rigidity.
Avoid cheap plastic wheels - they wear out quickly on this printer due to the high print speed.