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Gweike · Fiber
Gweike G2 Fiber · 20W
Desktop fiber marker for metal and select plastics
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Last updated How we evaluate
Released June 2023
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Showing specs for: 20W
TL;DR
Gweike G2 packages a 20W fiber galvo in a desktop form factor. Solid option if you want metal marking with Gweike ecosystem familiarity from their CO₂ lines.
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Best for
What makes this machine stand out
Hardware and workflow features worth understanding before you buy : not just wattage on a label.
Lowest entry price in the G2 line
At $1,349 with the 150 mm lens and electric lift (October 2026), the 20W costs about $450 less than the same G2 Pro configuration. The difference pays for the $129 roller rotary and part of a fume extractor.
Gentle power for fine marks
Lower power makes it easier to mark plated items, anodized layers and plastics without over-burning, and test grids converge quickly. Gweike lists a 0.1 mm minimum character size for the G2 series.
Our verdict
Ideal if you
Gweike G2 Fiber 20W fits shops that mark stainless, aluminum, and tools daily without a CO₂ bay. A solid bench option for jewelry, tags, and small batches.
Skip if you
Skip if wood, leather, or cast acrylic pay your bills. Deep metal cutting and large industrial panels often need more fiber headroom (30W or 50W) or a different machine class.
Pros
- Cheapest way into the G2 line: $1,349 with the 150 mm lens and electric lift (Gweike US store, Oct 2026)
- Light enough to move around (about 6.5 kg per Gweike) and usable handheld for parts that do not fit under the head
- Enough power for surface marking of steel, brass, anodized aluminum and many plastics
Cons
- Slowest of the line for depth: about 2.1 mm in brass after two hours of passes in Gweike's own test
- Thin-sheet cut-outs are slow: 11 trips over a 0.5 mm brass sheet at 10 mm/s (Gweike demo)
- Q-switched source, not MOPA: limited colour control on stainless steel
What this machine is for
Entry fiber marking on small metal parts
Desktop fiber marking for jewelry-scale and test jobs
Laser spot size
~0.02 mm spot
Motion precision: 0.01 mm
Sample engrave job
~4–9 min
10 × 10 cm (4 × 4 in)
Sample cut job
Not a cutter
Reference benchmark: same job size on every machine so you can compare times fairly. Times are estimates for the reference job above; your design complexity and settings will change them.
Materials
- · Stainless steel
- · Aluminum
- · Brass
- · ABS
- · Some coated metals
Accessories & add-ons
Typical inclusions and add-ons for this profile : confirm your SKU.
- Optional
Enclosure / cabinet
Third-party enclosure improves smoke control and safety
- Recommended
Laser safety glasses
~450 nm diode: OD rated for your wavelength
- Recommended
Fire extinguisher
Editorial guidance : not a live parts list. See also: Ventilation setup · Safety basics
Practical notes
Beginner notes
This profile is the 20W SKU on Gweike G2 Fiber. Read the TL;DR and benchmarks above, then compare other power options via the chips before buying.
Pro tips
Fix parts firmly; start with low power test squares on scrap metal. Rotary adds complexity: budget time to learn indexing.
Pro / technical specsRaw numbers for experienced users comparing machines.
- Max speed (spec)
- 7,000 mm/s
- Avg engrave speed
- 500–2,000 mm/s marking
- Avg cut speed
- N/A
Common questions
How deep can the G2 20W engrave into brass?
In Gweike's comparison video, two hours of repeated passes at 1,000 mm/s reached about 2.1 mm in brass, and one hour reached about 1.7 mm in slate. Everyday marking (serial numbers, logos, QR codes) only needs a few hundredths of a millimetre, which the 20W does quickly; millimetre-deep relief is slow at this power.
Can the G2 20W cut thin metal sheet?
Only very thin stock, and slowly. Gweike's demo cuts 0.5 mm brass at 10 mm/s in 11 passes. Treat it as an occasional cut-out tool for small tags and blanks, not as a sheet cutter.
Is the 20W enough, or should I pay more for the G2 Pro?
The 20W lists at $1,349 with the 150 mm lens and electric lift on Gweike's US store (October 2026); the manual-lift 110 mm version at $1,299 was sold out. It covers pet tags, tumblers, tools and anodized aluminum. If you expect deep engraving, coins or regular thin-sheet cut-outs, the Pro saves a lot of passes. Neither is a MOPA source, so colour marking on steel stays limited.
Alternatives to the Gweike G2 20W Fiber
Machines in the same space, picked from our database by type, price, and score.
ComMarker · Fiber · $1,399 – $1,632
The ComMarker B4 is a popular entry-level fiber galvo engraver for jewelry, tools, and metal gifts. Marks stainless, aluminum, and brass without spray. Small marking field: not a cutter for wood or acrylic.
Monport · Fiber · $2,440 – $2,690
Monport GT 30W brings split-cabinet fiber marking with autofocus: useful for varying part heights. Strong alternative to Gweike G6 in the same class.
Sculpfun · Fiber · $1,499
The Sculpfun G20 is a 20W 1064 nm fiber galvo on an open stand, launched in August 2026. It marks and engraves stainless, aluminium, brass, gold and titanium over a 150 × 150 mm field, with a motorized Z column, dual red-dot focusing and Wi-Fi. Sculpfun claims 10,000 mm/s, a 0.01 mm spot, engraving up to 1.5 mm deep and colour marking on stainless and titanium. No independent review yet; the open frame means you handle 1064 nm safety yourself.