Genmitsu PROVerXL 4x4 vs PRONAX Forge: A Bigger Bed or Automatic Tool Changes?

Quick answer: at $3,599 each (our prices at publish time, subject to change), these two Genmitsu machines spend the same money on opposite upgrades. The Genmitsu PROVerXL 4x4 buys you bed area: a 1300 × 1300 mm work area that takes a full 4 × 4 ft sheet, but no spindle and no tool changer. The Genmitsu PRONAX Forge 8080 with the NAX5 bundle buys you automation: a smaller 800 × 800 mm bed, a 2.2 kW spindle in the box, and a five-slot automatic tool changer. Choose the 4x4 if your parts are big. Choose the Forge if your jobs use several bits.

Most comparisons stack machines by size or by price. This one is useful precisely because the price is the same, so the only question left is what kind of bottleneck your shop has.

Table of Contents

1. Side-by-Side Specifications
2. What $3,599 Actually Buys on Each Machine
3. Work Area: What Fits on Each Bed
4. Automation: Why the ATC Changes the Math
5. Motion System, Spindle and Speed
6. Floor Space, Setup and Availability
7. Verdict: Choose the PROVerXL 4x4 If / Choose the PRONAX Forge If
8. Frequently Asked Questions

Side-by-Side Specifications

PROVerXL 4x4 work area, Z travel and the spindle requirement are taken from SainSmart's product page, which describes a 1300 × 1300 mm work area and lists a 65 mm trim router or spindle under "what you need to provide."

What $3,599 Actually Buys on Each Machine

The sticker prices match, but the boxes do not. Before comparing, put both machines on the same footing: ready to cut.

Once you add a spindle and a spoilboard, the PROVerXL 4x4 costs more than the Forge bundle. That does not make it worse value; you are paying for more than 2.6 times the cutting area. It does mean the honest comparison is "4x4 plus spindle" against "Forge with everything," not $3,599 against $3,599. Our router vs spindle guide explains the 65 mm options, and our real cost of a CNC setup covers the rest of the shopping list.

Work Area: What Fits on Each Bed

This is the PROVerXL 4x4's whole argument. At 1300 mm (51.2") square, it takes a full 4 × 4 ft sheet with room to clamp, and half of a 4 × 8 sheet in one setup. The Forge tops out at 31.5" square.

Jobs that need the PROVerXL 4x4

• Tabletops, bench seats and headboards over 32"
• Large signage, such as 48" business signs and real estate sign panels
• Cabinet sides and full-height doors cut from sheet goods
• Big nested batches, cutting dozens of parts from one sheet in a single run

Jobs the PRONAX Forge handles just as well

• Signs and plaques up to 31.5" in either direction
• Cutting boards, trays, coasters and decor
• Cabinet doors up to about 30" tall
• Inlays, jewelry boxes and small furniture parts

If you are not sure which group your work falls into, our CNC size guide walks through it product by product. The short version: measure your largest routine part plus about 2" of clamping margin on each side.

Automation: Why the ATC Changes the Math

The Forge's case is time, not size. With the NAX5 rack loaded, a job that uses a roughing end mill, a V-bit and a profile cutter runs start to finish without you. On the PROVerXL 4x4, each of those changes means stopping, swapping the bit with wrenches, re-zeroing and restarting.

For a one-off tabletop, that hardly matters. For a batch of 20 three-bit signs, it is 40 manual changes. At a conservative 3 minutes each, that is two hours of standing at the machine per batch. Our guide to automatic tool changers lays out the full payback math, including when an ATC is not worth it.

The 4x4 has a different route to throughput: it supports a second Z axis, so you can run two spindles and cut two identical parts at once. That doubles output on repeat single-bit work, such as cutting out shapes, but it does not help with multi-bit jobs, because both spindles still need manual changes.

Based on the calls our team fields every week, buyers often treat bed size as the default upgrade when their real bottleneck is babysitting the machine. Before choosing, count how many bit changes your last ten jobs needed.

Motion System, Spindle and Speed

Rigidity

The PROVerXL 4x4 runs linear rails on every axis with 20 mm ball screws on X and Y, and Genmitsu rates it at ±0.05 mm accuracy. The Forge uses rails on X and Z but a 20 mm hardened round shaft on Y. On paper, the 4x4 has the stiffer motion system. In practice both use closed-loop motors that correct missed steps, and both are well inside what woodworking and sign making need.

Spindle power

This is where the Forge pulls ahead. Its 2.2 kW spindle runs 0–18,000 RPM on 110 V or 0–24,000 RPM on 220 V, and holds speed in hardwood and aluminum. The 4x4's power depends on what you mount. A 710 W trim-router-class spindle is fine for wood and plastics but will need lighter passes in dense hardwood and aluminum. Genmitsu lists 1.5 to 2.2 kW water-cooled spindles as options for the 4x4 if you want to match the Forge, at extra cost. See our aluminum CNC guide for what that means in metal.

Speed

The Forge's rapid moves reach 6,221 mm/min on X and Y against 5,000 mm/min on the 4x4. That shaves a little time off jobs with lots of travel between features, but it is a smaller difference than either bed size or automation.

Floor Space, Setup and Availability

Footprint: the Forge measures 1168 × 1125 mm (46.0" × 44.3") and weighs 68.5 kg (151 lb), so it fits on a large workbench. The PROVerXL 4x4's frame has to clear a 51" square work area, so plan for a dedicated table and floor space well beyond 51 × 51 inches, plus room to load sheets from the front.

Assembly: the Forge ships as three semi-assembled modules. The PROVerXL 4x4 is modular too, but its larger frame typically takes a few hours to assemble and square.

Availability: at publish time the PROVerXL 4x4 is in stock and ships now. The PRONAX Forge is on pre-order with an estimated December 2026 ship date. If you need to fill orders this month, that settles it.

Verdict: Choose the PROVerXL 4x4 If / Choose the PRONAX Forge If

Choose the Genmitsu PROVerXL 4x4 if:

• Your parts are regularly larger than 31.5": tabletops, big signs, cabinet sides.
• You cut from full 4 × 4 sheets or want to nest big batches.
• Most jobs use one bit, or you want to double output with a second Z axis.
• You need a machine in stock now.

Choose the Genmitsu PRONAX Forge 8080 (with NAX5) if:

• Your parts fit within 31.5" square and most jobs use two or more bits.
• You want to start a job and walk away instead of returning for every bit change.
• You want a 2.2 kW spindle included for hardwood and aluminum.
• You have a workbench-sized space rather than room for a 4 × 4 table.

If your work is long and narrow rather than square, also look at the PRONAX Spark 6090, which gets the same ATC and spindle for $3,299. Our PRONAX Spark vs Forge comparison covers that choice, and PRONAX vs Shapeoko 5.1 Pro covers the main non-Genmitsu alternative. Browse every Genmitsu CNC router we carry or see our ATC CNC machines.

Frequently Asked Questions

Can I add an automatic tool changer to the Genmitsu PROVerXL 4x4?

Not the NAX5. Genmitsu designed it only for the PRONAX Spark and Forge, because it depends on the PRONAX controller and firmware. A third-party pneumatic ATC would require a different spindle, controller and air supply, which is a major rebuild.

Does the PROVerXL 4x4 come with a spindle?

SainSmart lists the spindle as not included and asks owners to provide a 65 mm trim router or spindle, recommending its 710 W model. Contact us to confirm what ships with the configuration you choose.

Is the PRONAX Forge big enough for furniture?

For components such as doors up to about 30", drawer fronts, chair backs and small tabletops, yes. For full-size tabletops, bench seats or cabinet sides over 31.5", you need the PROVerXL 4x4 or larger.

Which is more accurate, the PROVerXL 4x4 or the PRONAX Forge?

Both use ball screws and closed-loop motors and are accurate enough for woodworking, signs and light aluminum. The 4x4 has linear rails on every axis; the Forge uses a round shaft on Y. In practice, the spindle, bits and workholding affect your results more than this difference.

Can the PROVerXL 4x4 cut a full 4x8 sheet?

Not in one setup. Its 51.2" square bed takes a full 4 × 4 sheet. A 4 × 8 sheet must be cut in two sections or broken down first.

Which is better for a small sign business?

If most signs are under 31.5" and use several bits (roughing, V-carving, profiling), the Forge with NAX5 will save the most time. If you sell large signs over 32", the 4x4 is the only one of the two that cuts them in one piece.

Torn between more bed and more automation? Send us your typical part sizes and how many bits a job uses, and we will tell you which machine fits. Contact our team or call 1-833-962-5377.

Written By

Alina Oprea

Maker & Equipment Specialist

Alina Oprea is a hands-on maker, jeweler, and workshop specialist at The Maker’s Chest, with 25 years of silversmithing experience alongside a background in woodworking, renovations, construction, and commercial ductwork installation.

Her experience spans decorative woodwork, hand-carved doors, jewelry fabrication, homebuilding with Habitat, and real jobsite problem-solving — giving her a practical understanding of materials, tools, workflow, and what machines need to deliver beyond the spec sheet.