Voron Extruder Comparison — CW1 vs CW2 vs Galileo 2 vs Orbiter vs Sherpa

Extruder Comparison Toolhead

Choosing the right extruder for your Voron is almost as important as choosing the hotend. The extruder directly controls how much force is applied to your filament, how quickly it can retract, and how reliably it feeds material through the hotend. With five major extruder families — Clockwork 1, Clockwork 2, Galileo 2, Orbiter v2.0, and Sherpa Mini — all widely used in the Voron ecosystem, it's easy to feel overwhelmed.

Last updated: May 2025. In this guide, we break down every Voron-compatible extruder in terms of gear ratio, weight, torque, reliability, Klipper configuration, filament compatibility, and price. All prices reflect China-direct sourcing via our mini-program where applicable.

At a Glance — Extruder Spec Sheet

Clockwork 1 — The Original Afterburner Extruder

The Clockwork 1 (CW1) was the default extruder for the Afterburner toolhead on the original Voron V2.4 and Trident builds. It uses a 7:1 gear reduction driven by a standard NEMA14 pancake stepper motor. The design is a direct-drive BMG-geometry setup — dual drive gears (one driven, one idler) that grip the filament from both sides.

Pros: Proven design with thousands of builds. Simple to assemble with printed parts. Good grip on PLA, ABS, and PETG. The BMG gear geometry is well-understood and reliable. Replacement gears are cheap and widely available (~$5-10 per set).

Cons: Heavy compared to modern alternatives. The 7:1 ratio delivers adequate torque for standard printing but struggles with high-speed retractions above 50 mm/s or flexible filaments below 85A shore hardness. The integrated design means you can't swap extruders without swapping the entire toolhead. The printed idler arm can wear over time, introducing backlash.

Klipper rotational_distance: 22.678 (standard BMG gearset with 7:1).

Best for: Legacy Voron builds (V2.4r1, Trident with Afterburner) and budget builds where the toolhead is already printed. The CW1 is still perfectly capable for standard-speed printing (80-150 mm/s).

Clockwork 2 — The Stealthburner Standard

The Clockwork 2 (CW2) is the stock extruder for the Stealthburner toolhead. It's an evolution of the CW1 design with a few key improvements: an integrated idler arm with a captured bearing, a more rigid body, and optional 10:1 gear ratio via a different gearset.

Pros: The integrated idler is a significant improvement over the CW1 — it eliminates the printed idler arm wear issue and provides more consistent filament tension. Available in two gear ratios (7:1 standard, 10:1 high-torque). The 10:1 option provides noticeably better torque for flexibles and high-speed retraction. Compatible with all Stealthburner hotend options. Widely documented in Klipper configs and Voron documentation.

Cons: At ~160g, the CW2 is the heaviest extruder in this comparison. The additional mass on the toolhead reduces maximum acceleration for input shaper tuning — expect to lose 2,000-5,000 mm/s² in acceleration compared to a Galileo 2 or Sherpa Mini setup. The molded gears can wear over extended use, especially with abrasive filaments like carbon fiber PLA. Replacement gear sets cost $10-15.

Klipper rotational_distance: 7:1 ratio = 22.678; 10:1 ratio = 31.900 (or 3.1900 depending on stepper model — verify with your gearset).

Best for: Standard Voron V2.4r2 and Trident builds with Stealthburner. The CW2 is the default for a reason — it's reliable, well-supported, and works out of the box with no toolhead mods required.

Galileo 2 — The Lightweight Torque Monster

The Galileo 2 is an ingeniously designed extruder that takes the Sherpa Mini gear train (developed by the Annex Engineering team) and repackages it into an even smaller, lighter package specifically for the Stealthburner. It uses a 10:1 planetary gearset driven by a tiny NEMA14 pancake motor, delivering exceptional torque in an incredibly compact footprint.

Pros: At ~90g, it's the lightest full-performance extruder on this list — nearly half the weight of a CW2. The 10:1 gear ratio provides excellent torque for flexibles and high-retraction-acceleration scenarios. The planetary gearbox design is remarkably backlash-free. Steps perfectly into the Stealthburner toolhead as a drop-in replacement for the CW2. The low mass allows higher input shaper accelerations (12,000+ mm/s² on a well-tuned V2.4).

Cons: More expensive than the CW2 at $35-50. The planetary gearbox requires careful assembly and lubrication — if you buy a pre-assembled unit, verify it's properly greased. Idler tension adjustment is more critical than on the CW2 — too loose causes skipping, too tight causes gear wear and excess motor current draw. Some users report the idler arm can flex under high extrusion force when printing with a 0.8mm+ nozzle at high flow rates.

Klipper rotational_distance: 31.900 (10:1 ratio with standard BMG gears).

Best for: Speed-oriented builds where every gram on the toolhead matters. The Galileo 2 is the clear choice for high-acceleration Voron builds (300+ mm/s, 15k+ acceleration) and for users who print flexible materials regularly.

Orbiter v2.0 — The Lightweight Remote Extruder

The Orbiter v2.0 from Moons Industries (formerly LDO) is a unique entry — it's a standalone extruder that mounts separately from the toolhead. This makes it ideal for CANBus toolhead setups where you want to minimize toolhead mass while maintaining direct-drive performance.

Pros: At ~130g, it's lighter than the CW2 and can be mounted on the gantry or frame, further reducing moving mass on the X-axis. The 7:1 gear ratio uses metal spur gears that are extremely durable and backlash-resistant. The extruder body includes an integrated motor mount and a clear filament path that makes loading filament simple. Excellent for CANBus builds — the extruder can be mounted near the electronics, keeping the toolhead clean. The gearset is enclosed, so it's less prone to dust and debris than open-gear designs.

Cons: Because it mounts remotely from the toolhead, you lose the "direct drive" integration that makes toolhead-changed extruders simple. You'll need a filament guide tube between the extruder and toolhead. The 7:1 ratio limits torque for flexibles compared to 10:1+ designs. Some users report jamming with soft TPU (85A or below) due to the filament path geometry. At $35-55, it's one of the more expensive options. Requires toolhead-specific mount adapters.

Klipper rotational_distance: 7.710 (standard Orbiter v2.0 gearset).

Best for: CANBus builds, toolhead mass minimization, and users who prefer a modular setup where the extruder and toolhead can be independently upgraded.

Sherpa Mini — The V0.2 Legend

The Sherpa Mini, developed by Annex Engineering, is a dual-drive geared extruder with an 11:1 gear ratio. It was originally designed for the Voron V0.2 and remains the most popular extruder for that platform, though mounts exist for the Stealthburner as well.

Pros: The 11:1 gear ratio is the highest on this list, delivering exceptional torque — it can drive filament through even the most restrictive hotends without skipping. Extremely reliable with proper assembly — the gear train is simple and robust. The dual-drive BMG-style gears provide excellent grip. At ~105g, it's reasonably light. Kits are very affordable at $18-28 China-direct. Widely available and well-documented.

Cons: Not a drop-in for the Stealthburner without a printed mount adapter (the MiniSB mount exists but adds height to the toolhead). The 11:1 ratio means lower maximum extrusion speed — you can't feed filament as fast as a 7:1 extruder with the same stepper motor RPM. For high-flow hotends (Rapido UHF, Goliath), the Sherpa Mini can become the bottleneck. The printed gears (in the original design) can wear over time, though metal gear replacements are available.

Klipper rotational_distance: 30.152 (11:1 ratio with standard BMG gears).

Best for: Voron V0.2 builds, builds with high-torque requirements (flexibles, large nozzles), and budget-conscious builders who want maximum reliability.

Weight, Flow and Extrusion Force Comparison

Weight is the most immediately measurable difference between these extruders because it directly limits your acceleration. On a Voron V2.4 with Stealthburner, here's what each extruder weighs:

• Galileo 2: ~90g — allows 12k-18k mm/s² acceleration with input shaper
• Sherpa Mini (with MiniSB): ~105g — allows 11k-15k mm/s²
• Orbiter v2.0 (mounted separately): ~130g on gantry, ~40g on toolhead — allows 14k-20k mm/s²
• Clockwork 1: ~155g — allows 8k-12k mm/s²
• Clockwork 2: ~160g — allows 7k-11k mm/s²

Max flow rate depends primarily on your hotend, not the extruder. A Galileo 2 paired with a Dragon SF will bottleneck at ~20 mm³/s because of the hotend, not the extruder. However, with a high-flow hotend like the Rapido UHF (50 mm³/s), the extruder becomes the limiting factor. The CW2 and Galileo 2 can both feed a Rapido UHF at its maximum flow rate. The Sherpa Mini's 11:1 ratio means its maximum feed rate is about 30% lower than a 7:1 extruder at the same motor RPM.

Gear material matters for longevity. The Orbiter v2.0 uses all-metal spur gears that last essentially forever. The Sherpa Mini and CW2 use molded (sintered or cast) gears that wear gradually — expect 1-3 years of regular use before replacement is needed. The Galileo 2 uses a planetary gearbox with metal gears that are more wear-resistant than molded gears.

Flexible Filament Performance

For TPU and other flexible materials, gear ratio is the single most important extruder specification. Higher gear ratios provide more torque at the drive gears, which means the extruder can push and pull flexible filament without it buckling or slipping in the gears.

• 11:1 (Sherpa Mini): Best for soft TPU (75A-85A). Minimal slipping even at high retraction speeds.
• 10:1 (Galileo 2, CW2 option): Excellent for TPU. Handles 85A and above without issue.
• 7:1 (CW1, CW2 standard, Orbiter): Adequate for harder TPU (90A+) and TPE. Soft TPU may slip or buckle on retractions above 30 mm/s.

Direct drive vs Bowden: All extruders in this comparison run in a direct-drive configuration (extruder mounted close to the hotend). This is essential for flexible materials — Bowden setups cause buckling because the filament has too much unsupported length between the extruder gears and the hotend. The Orbiter v2.0 is a borderline case: mounted on the gantry with a short (~30-50mm) PTFE tube to the toolhead, it can still handle 90A+ TPU, but softer materials are problematic.

Reliability and Common Issues

Clockwork 2 gear wear: The molded gears in the CW2 are the most common failure point. With regular use (500+ hours), the drive gear teeth can develop grooves from filament friction. This gradually reduces extrusion consistency. Replace the gearset every 500-1000 hours for optimal performance. Symptoms: intermittent underextrusion, clicking sounds during retraction.

Galileo 2 idler tension: The Galileo 2 uses a spring-loaded idler arm that requires careful adjustment. Set the tension too loose and the filament will skip during high-flow printing. Set it too tight and the motor draws excess current (can cause overheating on long prints). The sweet spot is just tight enough that you can't push the filament through the gears by hand when the extruder is disengaged. Check tension every 50-100 hours.

Orbiter v2.0 jamming: The Orbiter's filament path uses a curved PTFE guide tube that can cause jamming with soft or worn filament. This is most common when transitioning from filament to filament or when using filament with high diameter variance. The fix is to ensure the PTFE guide is clean and properly seated, and to use high-quality filament with consistent diameter.

Sherpa Mini gear skipping: With the 11:1 ratio, the Sherpa Mini generates very high torque. If the idler tension is too loose, the gears will skip. If too tight, the motor will stall. The Sherpa Mini is very sensitive to proper assembly — follow the Annex Engineering documentation carefully.

Klipper Configuration — Calibration Steps

Each extruder requires accurate Klipper configuration for proper extrusion. Here's the step-by-step calibration procedure that works for all five extruders:

Step 1: Set rotational_distance

Use the values listed in each section above as your starting point. Add the following to your printer.cfg:

[extruder]
step_pin: ...
dir_pin: ...
enable_pin: ...
microsteps: 16  ; or 32 if your driver supports it
rotation_distance: 22.678  ; adjust per extruder
gear_ratio: 7:1  ; or whatever your extruder uses
full_steps_per_rotation: 200  ; standard NEMA14

Step 2: Verify with the "extrude" command

Mark the filament 100mm from the extruder entry point. Send EXTRUDE=100 via the Klipper console. Measure how much was actually fed. If the mark moved 97mm, your rotational_distance needs to be adjusted: new_value = current_value * (100 / actual_extruded).

Step 3: Set pressure advance

Use the TUNING_TOWER command for pressure advance. Start with a value of 0.020 for direct-drive setups and run the test pattern from the Klipper documentation. A well-tuned pressure advance value is typically 0.020-0.060 for these extruders depending on your hotend and filament type.

Step 4: Retraction calibration

Run retraction test towers starting at 0.3mm increments up to 2.0mm for direct-drive setups. The ideal retraction distance minimizes stringing without causing filament grinding or clicking. Typical values: CW1/CW2/Orbiter: 0.5-1.5mm; Galileo 2: 0.8-1.5mm; Sherpa Mini: 0.6-1.2mm. Retraction speed: 30-50 mm/s.

Price Comparison

Which Extruder Should You Choose?

For a speed-focused V2.4 or Trident build (300+ mm/s, 15k+ accel): Choose the Galileo 2. The weight savings alone are worth the price premium. You'll get higher accelerations, less ringing, and better print quality at speed.

For a standard Voron build (100-200 mm/s, 5k-10k accel): Choose the Clockwork 2. It's the stock extruder for Stealthburner for a reason. It's reliable, well-documented, and works perfectly for standard-speed printing.

For a V0.2 build: Choose the Sherpa Mini. It's the most popular extruder for the V0.2 for good reason — the 11:1 ratio provides excellent torque in a very small package.

For a CANBus build or maximum modularity: Choose the Orbiter v2.0. The ability to mount the extruder separately from the toolhead opens up build possibilities that the integrated extruders can't match.

For a budget build on Afterburner: The Clockwork 1 is cheap, proven, and still works perfectly for standard-speed printing. Don't feel pressured to upgrade if your CW1 is working fine.