xTool F1 Specifications & Fiber Laser FAQs: What a Purchasing Admin Wants You to Know

I'm the office administrator for a 30-person machine shop. I handle every purchase over $50—which last year added up to about $140,000 across 11 vendors, from safety gloves to our laser equipment. Colleagues ask me about xTool constantly, and the same questions come up every time. So, here are the answers I give them—the ones I've learned through purchase orders, spec sheets, and a few hard knocks.

• What are the exact xTool F1 laser engraver specifications?
• Is a fiber laser engraver the same as a CO2 for stone engraving?
• Who actually makes the fiber lasers inside xTool machines?
• Can the xTool F1 engrave on stone? What do I need to know about fiber laser stone marking?
• What should I look for in a laser welder—and is xTool's worth it?
• Are xTool machines only for big factories? Or do they take small customers seriously?
• Why does xTool keep talking about "Bragg grating" in its fiber laser patents?

1. What are the exact xTool F1 laser engraver specifications?

According to xTool's official product page (xtool.com/f1, as of early 2025), the original F1 combines a 20W diode laser and a 2W fiber laser in one chassis. The F1 Ultra—released in 2024—bumps that to a 20W diode plus 6W fiber. Working area is roughly 150 × 150 mm (just under 6 × 6 inches) with the lid closed, and less if you're using the rotary attachment. It uses a 1064nm fiber source and a 455nm diode source, which is why you get both metal marking and wood/acrylic cutting in a single unit.

But don't get too attached to those numbers. xTool updates specs pretty often, and "as of" is the key phrase. The way I see it, the exact pulse frequency matters less than the fact that the F1 is a dual-laser system—you're getting two tools for the price of one. For a workshop that does mixed materials, that's the real spec that matters.

2. Is a fiber laser engraver the same as a CO2 for stone engraving?

No. Not even close. CO2 lasers (the 10.6µm wavelength) work great on wood, acrylic, leather—anything organic. Fiber lasers operate at 1064nm, a wavelength that metal and some stone surfaces absorb better. For stone, a fiber laser doesn't "cut" the way a CO2 cuts wood. It heats the surface and produces a frosted, light mark on dark granite or slate. Want a deep, carved channel in a rock? You're looking at a rotary tool or sandblasting, not any desktop laser.

The misconception I had to unlearn: "fiber laser stone engraving" means deep engraving. It doesn't. It's a surface marking process. For headstones or tombstone markers, that's exactly what you need. Personal preference: I'd take a diode laser with good air assist over a cheap fiber laser for stone, because diodes handle smooth surfaces more forgivingly. But for production runs on polished granite, fiber wins on speed and contrast.

3. Who actually makes the fiber lasers inside xTool machines?

This is one of the first questions I asked when I saw the spec sheets. xTool designs the system, writes the software, and has patents on the beam-combining architecture—but the fiber laser source itself is typically supplied by established industrial manufacturers like JPT and Raycus. That's not a knock on xTool. That's how the laser industry works: almost nobody makes every component. Even big brands source diodes from Osram or Sharp and fiber lasers from JPT or Raycus.

What xTool adds is integration, safety features, and the software that makes the machine usable for non-physics majors. For instance, their dual-core fiber laser design uses an internal fiber Bragg grating to stabilize the output—that's the patent they mention in marketing. I assumed all fiber lasers were the same once the wattage was equal. Turned out, the pulse stability and focus consistency matter just as much. I learned that one after comparing markings from two lasers with identical advertised wattage. One looked crisp, the other looked charred. Both were "fiber lasers." Different integration.

4. Can the xTool F1 engrave on stone? What do I need to know about fiber laser stone marking?

Yes, but with caveats. The F1's fiber laser (or diode laser, for that matter) can mark dark, polished stones like granite or slate. The mark is a pale frosted area that shows up because the laser removes the tinted surface layer. On light stones like marble, that same process leaves almost no visible contrast unless you use a marking agent—a liquid or spray that darkens where the laser treats it. I keep a bottle of LMM (laser marking material) around for white marble projects.

One thing I wish someone had told me early: keep the air assist on. I skipped it once to reduce dust blowing around, and the stone dust recrystallized on the lens. That little mistake cost me $200 for a new lens. (Note to self: never skip the air assist.) Also, scan speed and power are a balancing act. On granite, I run about 80% power and speed around 1000 mm/s, then adjust from there. If the mark looks too dark, slow down—but you're actually melting the stone, which is not what you want on a fine marker.

5. What should I look for in a laser welder—and is xTool's worth it?

We haven't bought one yet, but I've reviewed quotes and spec sheets for hand-held laser welders in the 150W–200W range. The critical specs are: peak pulse power (that's what actually melts the metal), the fiber core diameter (finer = finer weld bead), and whether the unit has internal water cooling or needs an external chiller. A 150W welder might look cheap, but if it needs a separate $1,000 chiller, the "cheap" price disappears.

I nearly made that mistake last year: saw a "budget" 200W welder, low price, and started the paperwork. Then I checked the spec sheet—it listed "external cooling required" in tiny print. The total landed cost was within $300 of a more reputable model with integrated cooling. So I went with the other one. As for xTool's welder, they released one in 2024, but I don't have enough field experience with it yet. The advice I give my team is the same: look at the cooling system, the pulse width range, and the service network. Wattage alone is marketing.

6. Are xTool machines only for big factories? Or do they take small customers seriously?

I'm glad you asked, because this one matters. Our first xTool order was a $1,200 engraver for a one-off client project. Their sales rep answered my questions for a week without ever asking about our annual volume. That's why, two years later, when we needed a fiber laser, I put xTool on the shortlist. We ended up spending about $20,000 with them. Small orders are not a nuisance—they're a test drive. Any supplier that treats a $200 order like a potential $20,000 relationship will earn my business.

The way I see it, if a quote comes with a "minimum order" that feels like a polite way to say "go away," that's a red flag. I'm not saying vendors can't have MOQs; I'm saying don't tolerate being ignored because your quantity is small. xTool, in our experience, treats small shops like customers, not annoyances. That's rare and worth paying for.

7. Why does xTool keep talking about "Bragg grating" in its fiber laser patents?

Good question—I had to look it up. A fiber Bragg grating is a microscopic periodic pattern written into the core of the fiber. It acts like a wavelength-specific mirror, letting the laser source deliver a more uniform pulse. In xTool's dual-core design, the grating helps stabilize the beam and gets rid of power spikes that can make engravings look scorched. That's why they mention it in marketing: it's a real technical differentiator, not just a buzzword.

Will it matter to your day-to-day? If you're engraving metals with fine detail, yes. A stable pulse means less haze, sharper edges, and fewer rejects. If you're just cutting wood, you probably won't notice. The reason I bring it up is so you can read a spec sheet and understand why two lasers with the same watts might perform differently. It's not magic—it's optics. Period.