Genmitsu PRONAX Spark vs Forge: Which ATC CNC Router Should You Buy?

Quick answer: buy the Genmitsu PRONAX Spark 6090 if your work is long and narrow (signs, guitar necks, rows of plaques) or you want the cheapest way into automatic tool changing. Buy the Genmitsu PRONAX Forge 8080 if your work is wide (cabinet doors, square signs, nested sheets of small parts). Everything else about the two machines is identical: the same 2.2 kW spindle, closed-loop motors, ball screws, controller and NAX5 five-slot tool changer. The decision is bed shape, footprint and $200 to $300.

Both machines are new for late 2026, and most comparison content online is manufacturer marketing that treats them as interchangeable. They are not interchangeable for every shop. This guide walks through what is shared, what differs, and when the ATC bundle earns its price.

Table of Contents

1. What the Spark and Forge Have in Common
2. The Real Difference: Bed Shape, Not Bed Size
3. Footprint, Weight and Shop Fit
4. Price and What the ATC Bundle Adds
5. Machine Only or ATC Bundle?
6. Verdict: Choose the Spark If / Choose the Forge If
7. How PRONAX Compares to Other CNC Routers We Carry
8. Frequently Asked Questions

What the Spark and Forge Have in Common

Genmitsu built PRONAX as one platform in two bed sizes. The motion system, spindle, electronics and tool changer are the same parts on both machines, so cut quality, speed and material capability should be the same. Neither machine is the "pro" version of the other.

One shared detail is worth knowing before you buy either machine. The X and Z axes ride on profile linear rails, but the Y axis uses a 20 mm hardened round shaft. That is a common cost decision at this price, and the closed-loop motors and ball screws do most of the accuracy work. Just be aware of it if you are comparing spec sheets against machines with rails on every axis, such as the Shapeoko 5.1 Pro (covered in our PRONAX vs Shapeoko comparison).

The Real Difference: Bed Shape, Not Bed Size

On paper the Forge is "bigger," and it does have more total area: 0.64 m² versus 0.54 m², about 18% more. But the more useful way to think about it is shape. The Spark is a long rectangle. The Forge is a square. Each one fits parts the other cannot.

Parts that only fit the Spark

Anything between 31.5" and 35.4" long and under 23.6" wide. That covers a lot of what small shops sell: 34-inch house-name signs, a full guitar neck blank with headstock, long charcuterie boards, coat-rack backers and stair-sign blanks. If you measure your best-selling products and several land in that 32–35" band, the Spark is the only PRONAX that cuts them in one pass.

Parts that only fit the Forge

Anything wider than 23.6", up to 31.5" square. Think 24" × 30" cabinet doors, 30-inch round tabletops and clock faces, square wall art, and drawer fronts cut side by side. The square bed also nests small parts more efficiently. A sheet of coasters, ornaments or name tags laid out on a square bed wastes less material at the edges than the same layout on a long narrow bed.

Parts that fit both

Most everyday jobs: plaques, 18" × 24" signs, cutting boards, inlays and small furniture parts. If nearly everything you make fits inside 23" × 31", the shape question disappears and the decision comes down to price and floor space.

Neither machine is a sheet-goods router. If you regularly cut full 4 × 8 or 4 × 4 sheets, read our PROVerXL 4x4 vs PRONAX Forge comparison and our CNC size guide before choosing.

Footprint, Weight and Shop Fit

The footprints are closer than the beds suggest, but they are oriented differently. That matters in a one-car garage or along a wall.

The Spark is 8 inches narrower but 4 inches deeper. Against a wall, the Spark's 38-inch width fits on many heavy workbenches and leaves room to walk past. The Forge needs a table at least 46 inches wide. Either way, plan for clearance on the side where the NAX5 rack mounts, room to load stock, and a dust-collection hose route.

Both machines ship as three semi-assembled modules (the XZ module and left and right Y modules), so neither is a full-day kit build. At 137 to 151 lb, you will want a second person to set the frame on its table.

Price and What the ATC Bundle Adds

Each machine comes in two configurations. Prices below are our listed prices as of publish time and are subject to change; check the product pages for current pricing.

The bundle adds two things. The first is the NAX5 tool changer with its calibration jig, plug gauge and cable. The second is the PRONAX Hybrid Table, a bolt-on platform of replaceable spoilboard panels with clamping bars and leveling feet (three panels on the Spark, four on the Forge). The hybrid table sells for $399 on its own, so the tool changer itself is effectively a $500 to $600 add-on. For context, SainSmart lists the NAX5 alone at $599 on its own store.

Both machines are currently pre-order, with shipping estimated for December 2026 from Genmitsu's next production batch.

Machine Only or ATC Bundle?

This is the question that matters more than Spark versus Forge. The NAX5 is what makes PRONAX different from every other Genmitsu router, so buying a PRONAX without it gives up the main reason the line exists.

Get the bundle if

• Most of your jobs use two or more bits (roughing plus finishing, or pocketing plus V-carving).
• You run batches of the same product, where every manual change is repeated 10 or 20 times.
• You want to walk away from the machine during a job. Without an ATC, every bit change means you have to be standing there.

Machine only can make sense if

• Most jobs are one-bit profile cuts, so a tool changer would rarely fire.
• Your budget is fixed now and you plan to add the NAX5 later. The machine-only configuration is NAX5-compatible.
• You mainly want the 2.2 kW spindle and closed-loop motion at this price and do not care about automation.

Based on the calls our team fields every week, buyers moving up from a desktop CNC tend to underestimate how much of their day goes to bit changes until they count them. Our guide to automatic tool changers walks through that math, including when an ATC does not pay for itself.

One practical point if you buy the bundle: each slot needs its own ER20-A tool holder, and tools must stay under 75 mm total length and 14 mm diameter. Long-reach end mills and large surfacing bits may not fit the rack, so check your current bit collection against those limits.

Verdict: Choose the Spark If / Choose the Forge If

Choose the PRONAX Spark 6090 if:

• Your products are long and narrow: signs up to 35", guitar necks, boards, rows of plaques.
• You want the lowest-cost ATC machine we sell ($3,299 with NAX5 at publish time).
• Your space is narrow, such as a wall-mounted bench in a garage.

Choose the PRONAX Forge 8080 if:

• Your products are wide: cabinet doors, round tables, square wall art over 24".
• You nest many small parts per sheet and want less edge waste.
• You want the most cutting area in the PRONAX line and have a 46"-wide table for it.

If you cannot decide, measure your five best-selling products. If any of them is longer than 31.5", get the Spark. If any is wider than 23.6", get the Forge. If all of them fit both, save the $200 to $300 and take the Spark.

How PRONAX Compares to Other CNC Routers We Carry

PRONAX sits in a crowded $2,400 to $4,500 bracket. Two comparisons come up most often:

• Bigger bed instead of an ATC: the Genmitsu PROVerXL 4x4 lists at the same $3,599 as a Forge ATC bundle but gives you roughly 2.6 times the cutting area and no tool changer. See PROVerXL 4x4 vs PRONAX Forge.
• A more established ecosystem: the Shapeoko 5.1 Pro has rails on every axis, Carbide 3D's software and a 60-day "mistakes" guarantee, but no factory ATC. See PRONAX vs Shapeoko 5.1 Pro.

You can see both PRONAX machines side by side in our ATC CNC machines collection, or browse every Genmitsu CNC router we carry.

Frequently Asked Questions

Is the PRONAX Forge more powerful or accurate than the Spark?

No. Both use the same 2.2 kW spindle, NEMA 24 closed-loop motors, ball screws and controller. The Forge has a larger, square bed; it does not cut harder or more precisely.

Can I add the NAX5 tool changer later if I buy machine only?

Yes. Both Machine Only configurations are NAX5-compatible. The NAX5 works only on the PRONAX Spark and Forge because it depends on the PRONAX controller and firmware. Contact us if you want to plan the upgrade.

Which PRONAX is better for guitar building?

Usually the Spark. Its 35.4" length handles a full neck blank with headstock in one setup, and a solid-body blank fits within its 23.6" width. The Forge only makes sense if you also cut wide parts such as acoustic body moulds.

Which PRONAX is better for sign making?

It depends on the sign shape. Long horizontal signs up to 35" fit only the Spark. Signs taller than 23.6", like square or round signs up to 31.5", fit only the Forge.

Can the PRONAX Spark or Forge cut aluminum?

Yes, with suitable bits, feeds and speeds. The 2.2 kW spindle and closed-loop motors give them far more headroom in aluminum and brass than trim-router machines. Our aluminum CNC guide covers the setup.

Do I need 220 V power?

No. Both run on AC 110–230 V. On a standard US 110 V outlet the spindle tops out at 18,000 RPM; on 220 V it reaches 24,000 RPM, which helps with small-diameter bits.

When will the PRONAX Spark and Forge ship?

Both are on pre-order with shipping estimated for December 2026. Orders reserve a machine from Genmitsu's next production batch.

Still deciding between the Spark and Forge? Send us the dimensions of the parts you cut most and we will tell you which bed 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.