Collets for your shank sizes
RequiredThe collet is what actually grips the cutter, and each one holds a single shank diameter. It also silently decides which bits you can buy at all, so it is worth getting right before ordering cutters.
Whether the X-Carve Pro 4x4 is right for you comes down to what you actually cut and how much of the setup you want to own yourself. The lists below are drawn from this machine's real specification and its real gaps - not from marketing.
1,500 W is production-adjacent power for a desktop machine, and at this level the spindle is rarely what holds you back. The questions worth asking move to whether the frame and drives can put that power into the cut without deflecting, and whether your dust extraction and workholding are sized for the removal rate it makes possible. Power you cannot hold rigidly is power that turns into chatter.
Inventables does not state whether the X-Carve Pro 4x4 runs closed-loop or open-loop steppers, and that gap matters more than most unpublished figures. The loop type decides whether the machine can detect a lost step or merely hopes it has not taken one - the difference between a scrapped aluminium part and a sound one. We exclude the motor component from the score rather than assume, and you should treat any claim that it handles metal as untested until the drive type is on the maker's own sheet.
Ball screws convert rotation to motion with effectively no backlash, so the axis returns to the same place every pass - the mechanical basis for holding a tolerance rather than merely getting close to it; profile linear rails are the rigid choice for guideways - a rail-and-block system resists twist and load far better than the alternatives and is the reason this frame can carry a real cut. Rigidity is a chain, and the machine is only as accurate as its weakest link in that chain - a ball screw guided by V-wheels is still limited by the V-wheels.
The open-loop trade-off is the argument the best CNC routers for metal list is built around.
Inventables states the X-Carve Pro 4x4 handles wood, plastics and soft metals such as aluminium and brass. The honest reading is that "handles" is not "handles well at any setting" - each of these fails in its own way when the chip is wrong, and that is exactly what the feed-and-speed pages below exist to prevent.
In wood the enemy is heat: a burn mark means the chip is too thin to carry heat out of the cut, so the fix is usually to feed faster, not slower - the instinct most people get wrong. In aluminium the machine is the limit long before the chart is: keep the chip load up even as you drop the depth, and use a lubricant, because a thin chip and a dry cut are what weld aluminium to the flutes. In acrylic the chip is the cooling system: too thin and the plastic melts and re-welds instead of shearing, so a single-flute cutter and a healthy feed beat a fast spindle.
This score rests on 62% of the model, and that figure is the most important thing on the page after the score itself. What scored - spindle power, material breadth, rigidity and value - comes from published figures. What did not - work area and motor quality - is unpublished, and we exclude it and renormalise across the rest rather than scoring it zero, because punishing a machine for a fact we simply do not know would be the opposite of honest.
Concretely: with the motor type unpublished, the score cannot tell you whether the drive can catch a lost step, which is the difference between a machine you can trust in metal and one you cannot. The number is honest about the machine's stated strengths and silent on everything the maker left off the sheet.
The X-Carve Pro 4x4 earns its place on the strength of an honest, fully-published specification you can actually check. Where it asks for a clear head is the compromise: a third of its specification is unpublished, so treat the score as a ceiling and the mechanics on this page as the real evidence. Bought for the work it is actually built for, it is a sound machine; bought for work it quietly cannot do, it will disappoint in exactly the way its unpublished or open-loop specs warn it might. Match it to your material and it holds up.
The reference figures. Missing values show as not published - we do not estimate them.
| Nominal size | 4x4 - Inventables lists this size as a 48" x 48" work area The manufacturer's own designation for the machine. Nominal size is not cutting travel, and the difference does not run reliably in either direction - Carbide 3D's own sheet shows the 2x2 travelling 24.53in against a 24in nominal. It is recorded exactly as published and is not used in scoring. |
|---|---|
| Work area X | Not published |
| Work area Y | Not published |
| Z travel | 165.1 mm (6.50″) |
| Spindle power | 1,500 W |
| Spindle speed | Not published |
| Motor type | Not published |
| Frame | Not published |
| Materials stated | wood, plastic, soft metal |
| Manufacturer list price | $7,495.00 |
| Tier | prosumer |
|---|---|
| Nominal size | 4x4 - Inventables lists this size as a 48" x 48" work area |
| Spindle | 2 hp / 1.5 kW VFD, air-cooled, 8,000–24,000 RPM |
| Collet | ER16-A, 1/8" and 1/4" included |
| Ball screws | 1" (25mm) ball screws with linear guides |
| Motors | NEMA-23, 292 oz-in |
| Accuracy | .001", factory calibrated |
| Z travel in | 6.5 |
| Gantry clearance in | 5 |
| Variants usd | [object Object] |
| Unpublished note | Inventables states the size only as '4x4' with no explicit X/Y travel figure, so we record the nominal designation and leave the cutting area unscored rather than deriving millimetres from the machine's name - the same rule we apply to the Shapeoko 5.1 Pro. |
Each component scored against an absolute reference scale, then renormalised across the components that were published.
| Component | Weight | Score |
|---|---|---|
| Work area | 22 | Not scored - spec unpublished |
| Spindle power | 18 | 100 |
| Motor quality | 16 | Not scored - spec unpublished |
| Material breadth | 14 | 75 |
| Rigidity | 15 | 40 |
| Value | 15 | 12 |
The parts a working setup needs alongside the machine itself.
The collet is what actually grips the cutter, and each one holds a single shank diameter. It also silently decides which bits you can buy at all, so it is worth getting right before ordering cutters.
The only consumable that wears every hour the machine runs, and the one where the wrong choice shows in the finish immediately. Buy the two or three geometries your work actually needs rather than a large assortment.
Sacrificial board plus the cutter to skim it flat - the cheapest accuracy upgrade there is. Note it eats into the 165mm of Z travel, so account for its thickness when checking stock will clear.
A router removes material as airborne particulate rather than as chips you can sweep, and MDF and composites throw a fine fraction that stays suspended. Capture happens at the cutter or it effectively does not happen.
Every specification on this page is transcribed from the manufacturer's own published sheet: www.inventables.com · verified July 28, 2026. Marketplace listings, forums and news aggregators are never sources of record.
Scores are computed from published specifications by a formula we document on the methodology page. No brand can pay for a position.