If you’re considering a 20W fiber laser, one of the first questions you’ll ask is: how deep can it actually engrave on metal?
Using the Gweike G2 Plus 20W Fiber Laser Engraver as a real-world example, this guide breaks down what you can expect in terms of engraving depth, performance, and practical results.
Table of Contents
What Is a 20W Fiber Laser Engraver?
A 20W fiber laser uses a 1064nm wavelength, which is ideal for marking and engraving metals.
Machines like the G2 Plus are designed for:
- Stainless steel
- Aluminum
- Brass and copper
- Gold and silver
They excel at precision engraving, not deep cutting.
How Deep Can a 20W Fiber Laser Engrave?
Most standard 20W fiber lasers are typically limited to shallow engraving. However, newer machines like the Gweike G2 Plus 20W Fiber Laser Engraver push those limits further with improved beam quality and galvo performance.
Realistic Engraving Depth
With a modern 20W fiber laser like the G2, you can expect:
- 0.01 – 0.1 mm (0.0004” – 0.004”) per pass
- 0.1 – 0.3 mm (0.004” – 0.012”) typical multi-pass depth
- Up to ~1.0–1.5 mm (0.04” – 0.06”) maximum depth with optimized settings
Important: What “Up to 1.5 mm” Actually Means
The ~1.5 mm (0.06”) depth is achievable, but not in a single pass and not on all materials.
To reach this depth, you’ll need:
- Multiple passes (often 20+ depending on material)
- Slower speeds
- High power settings
- Proper cooling between passes
This is best suited for deep engraving projects, not fast production work
Material Matters (A Lot)
Depth varies depending on the metal:
Engraving depth with a fiber laser depends heavily on the metal’s properties, such as hardness, reflectivity, and thermal conductivity.
- Aluminum → Easy to engrave, achieves deeper results quickly
- Brass → Moderate difficulty, good depth with multiple passes
- Stainless steel → Harder material, requires more passes for depth
- Copper → Highly reflective, more challenging to engrave deeply
- Titanium → Better for color engraving than deep cutting
- Gold → Soft metal, engraves easily and can achieve good depth quickly
- Silver → Soft but highly reflective, engraving is smooth but may require careful settings for depth
In general, softer metals (like gold and aluminum) engrave deeper and faster, while harder or highly reflective metals (like stainless steel and copper) require more time, tuning, and multiple passes
Gweike G2 Advantage
The Gweike G2 Plus 20W Fiber Laser Engraver is an excellent option for deep engraving thanks to:
- [8K HD & 15000mm/s] - GWEIKE G2 Plus 20W 1064nm fiber laser engraving machine uses high-speed precision galvanometer to provide unparalleled accuracy and versatility, achieving engraving speeds up to 15000 mm/second. GWEIKE G2 Plus offers three different engraving resolution options (2k, 4k, 8k) , the engraving accuracy is 0.001 mm, ensuring that highly detailed engraving effects can be easily obtained.
- High-speed galvo system (up to 15,000 mm/s)
- Stable beam output for consistent multi-pass engraving
- Improved heat control for deeper, cleaner results
This allows it to reach 1 mm+ (0.04”+) depth, while many older 20W machines struggle beyond ~0.3 mm (0.012”)
Deep Engraving vs Standard Engraving
Type | Depth (mm) | Depth (inches) | Use Case |
|---|---|---|---|
Surface engraving | 0.01–0.05 mm | 0.0004”–0.002” | Logos, markings |
Standard engraving | 0.05–0.3 mm | 0.002”–0.012” | Text, branding |
Deep engraving | 0.3–1.5 mm | 0.012”–0.06” | Jewelry, molds, industrial parts |
Key Takeaway
A 20W fiber laser is no longer limited to light marking.
With machines like the Gweike G2 Plus 20W Fiber Laser Engraver, you can achieve:
- Precise, detailed engraving
- Moderate depth for most applications
- Deep engraving up to ~1.5 mm (0.06”) with proper setup
20W vs 30W vs 50W Fiber Laser Engravers (Comparison)
Choosing between 20W, 30W, and 50W fiber lasers comes down to depth, speed, and workload. Here’s a clear side-by-side comparison using machines like the Gweike G2 20W, 30W, and 50W Fiber Laser Engravers.
Feature | 20W Fiber Laser | 30W Fiber Laser | 50W Fiber Laser |
|---|---|---|---|
Typical Depth (multi-pass) | 0.1–0.3 mm (0.004”–0.012”) | 0.3–0.6 mm (0.012”–0.024”) | 0.5–1.0+ mm (0.02”–0.04”+) |
Max Depth (optimized) | ~1.0–1.5 mm (0.04”–0.06”) | ~1.5–2.0 mm (0.06”–0.08”) | ~2.0–3.0 mm (0.08”–0.12”) |
Engraving Speed | 15,000 mm/s | 15,000 mm/s | 15,000 mm/s |
Passes Needed for Depth | High (many passes) | Moderate | Low |
Detail Precision | Excellent | Excellent | Very good (slightly less fine at high power) |
Best For | Fine engraving, jewelry | Balanced work | Deep engraving, production |
Metal Cutting Ability | Very limited | Slightly better | Can cut thin metal (with setup) |
Heat Control | Easier | Moderate | Requires more tuning |
Cost | Lowest | Mid-range | Highest |
Bottom Line
If you need precision, detail, and flexibility, a 20W fiber laser is more capable than ever.
For most users, the G2 proves that 20W can handle both fine engraving and deeper material removal—as long as you’re willing to trade speed for depth when needed.
Frequently Asked Questions
What materials can a 20W fiber laser engrave?
A 20W fiber laser can engrave most metals and some hard plastics with excellent precision. Common materials include:
Stainless steel, aluminum, brass, copper
Titanium, gold, silver (for surface marking)
ABS, polycarbonate, and other engineered plastics
Painted or anodized metals
It can also mark on rubber, leather (synthetic), and some coated woods, but it’s not suitable for glass, clear acrylic, or organic materials like paper or fabric.
Can a 20W fiber laser cut metal?
Technically yes, but it’s not designed for cutting. If you plan to cut metal regularly, a 500 – 1000W fiber laser or Plasma machine is recommended.
What kind of software is used with a 20W fiber laser?
Most 20W fiber lasers use EZCAD2, which is free and widely supported. Some machines (like those using BJJCZ motherboards) may also work with LightBurn (in beta for fiber lasers). The software allows you to:
Import vector (AI, SVG, DXF) and raster files (JPG, PNG)
Adjust laser power, frequency, and speed
Add serial numbers, barcodes, QR codes
Is a 20W fiber laser suitable for starting a business?
Yes, it’s ideal for small businesses and makers looking to engrave custom items like:
Metal tumblers
Jewelry
Industrial tags
Branding tools (logos, barcodes)
It offers high precision, decent speed, and low maintenance, making it a budget-friendly entry point into metal laser engraving. However, if your business requires cutting or deep engraving, a higher-wattage machine may be more efficient in the long run.