4040 vs 6040 CNC Router: Which One Should You Buy?

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What 4040 and 6040 mean

The numbers name the bed class: 4040 is the smaller standard bed, 6040 the wider one. The 6040 class fits bigger panels and more parts per run. The tradeoff is footprint: the wider bed needs a bigger bench.

The 4040 class: the AnoleX 4030-Evo example

The AnoleX 4030-Evo Ultra 2 is the closest to the 4040 class here. The listing states an 800W trim router with 6-speed settings from 8000 to 24000 RPM and an Er11-1/8 in collet, with software-controlled run and stop and manual dial speed control. It states repeatability accuracy of ±0.005mm and actual cutting and engraving accuracy on 6061 aluminum of ±0.02mm. Each axis states HGH-15 dual linear rails and 1204 ball screws with dual-bearing ends.

The AnoleX listing states this combination for aluminum and brass as well as wood and acrylic. For desk-scale parts and signs, the AnoleX example’s stated figures are the case here.

The 6040 class and beyond: the FoxAlien XE-Ultra 8080 example

The FoxAlien XE-Ultra 8080 is bigger than the 6040 class, which makes it a good example of what the step up buys. The listing states a 33 by 33 by 4.72 in XYZ working area with a 5.3 in pass height, 16mm ball screws on XY and 12mm on Z, HG-15 linear rails on all axes, and NEMA 23 closed-loop stepper motors with 2.6 N.m torque and step-loss protection. The frame states 46 by 80 mm aluminum.

The stated closed-loop steppers with step-loss protection and the 5.3 in pass height suit thicker stock and bigger panels. For panels and larger parts, the 6040 class and up is the larger-format example here.

The smaller desktop class: 3018 and 3030 examples

Two smaller machines round out the picture. The Twotrees TTC3018 Pro states a 300 by 180 by 40 mm working area at 15 pounds, with 0.1mm positioning accuracy, an all-metal Z-axis with T8 lead screws, and a 32-bit GRBL control board over USB. The Genmitsu 3030-PROVer Ultra states a 710W digital spindle, ±0.03mm precision, and HG15 dual linear rails with 1204 ball screws in an all-metal chassis.

These are the engraving and light-milling class: nameplates, small PCBs and detail work. If your parts fit in a hand, the 3018 and 3030 class is cheaper and smaller; if they do not, move up to the 4040 class.

Spindle power: what the listings state

The AnoleX example states an 800W trim router with 6-speed settings from 8000 to 24000 RPM. The Genmitsu example states a 710W digital spindle, stated as 2.4x stronger than old 300W spindles, with a real-time digital display. The Twotrees and FoxAlien state no spindle wattage figure. For the stated wattage, the AnoleX names 800W and the Genmitsu names 710W.

Rails and screws: what the listings state

The AnoleX example states HGH-15 dual linear rails and 1204 ball screws on each axis with a dual-bearing design at both ends. The Genmitsu example states HG15 dual linear rails and 1204 ball screws on every axis in an all-metal chassis. The FoxAlien example states 16mm ball screws on XY and 12mm on Z with HG-15 linear rails on all axes. The Twotrees example states an all-metal Z-axis with T8 lead screws. For the stated ball screws, three name them; the Twotrees states lead screws.

Accuracy figures: what the listings state

The AnoleX example states repeatability accuracy of plus or minus 0.005mm and actual cutting and engraving accuracy on 6061 aluminum of plus or minus 0.02mm. The Genmitsu example states plus or minus 0.03mm precision. The Twotrees example states 0.1mm positioning accuracy. The FoxAlien example states no accuracy figure. For the stated tightest figure, the AnoleX names it.

Working areas: what the listings state

The FoxAlien example states a 33 by 33 by 4.72 in XYZ working area with a 5.3 in pass height. The Twotrees example states a 300 by 180 by 40 mm working area at 420x355x280mm overall. The AnoleX and Genmitsu state no working area figure in the shown text. For the stated largest area, the FoxAlien names it; for the stated pass height, it is the only pick.

Control boards and connectivity

The Twotrees example states a 32-bit GRBL control board over USB with no built-in TF card slot, no Bluetooth and no WiFi. The AnoleX example states software-controlled run and stop with manual dial speed control. The Genmitsu and FoxAlien state no control figure in the shown text. For the stated control board, the Twotrees names the 32-bit GRBL; the AnoleX names software run and stop.

Weight and frames

The Twotrees example states 15 pounds with a 420x355x280mm compact size. The FoxAlien example states a 46 by 80 mm aluminum frame. The AnoleX and Genmitsu state no weight figure in the shown text. For the stated lightest machine, the Twotrees names 15 pounds.

4040 vs 6040 cnc router: which should you choose?

For desk-scale parts such as signs, small panels and aluminum brackets, the AnoleX 4030-Evo example is the closest stated match here. The AnoleX 4030-Evo example states an 800W-class spindle, ball screws on every axis, and stated accuracy figures at this size. For larger panels or more parts per sheet, the 6040 class is the wider stated class here. The FoxAlien 8080 example states closed-loop steppers, ball screws, and a 5.3 in pass height.

FAQ: lasers and CNC

Which of these is a 4040?

None exactly. The AnoleX 4030-Evo is the closest to the 4040 class here. The FoxAlien is an 8080, bigger than the 6040 class.

Which states the most powerful spindle?

The AnoleX states an 800W trim router. The Genmitsu states a 710W digital spindle. The Twotrees and FoxAlien state no spindle wattage figure.

Which states the tightest accuracy?

The AnoleX states ±0.005mm repeatability and ±0.02mm on 6061 aluminum. The Genmitsu states ±0.03mm. The Twotrees states 0.1mm. The FoxAlien states no accuracy figure.

Which has closed-loop steppers?

The FoxAlien states NEMA 23 closed-loop stepper motors with step-loss protection. The others state no closed-loop figure.

Which is the lightest?

The Twotrees states 15 pounds. The others state no weight figure.

Related: CNC router vs laser engraver.