Quick take
When you are shopping for servo stepper motion control components, the real question is which AC servo package matches machine size, axis count, and input voltage. These four kits cover very different jobs: a used 2-axis lathe set, a new 4-axis package with Mach3 controller, a high-torque brake-equipped servo, and a compact Yifeng servo kit. The listed prices sit between the low end and a full four-axis bundle, so the trade-off is usually power and axis count versus cost and simplicity.
Listed price comparison
| Product | Listed price | Price bar |
|---|---|---|
| Yaskawa 2 axis AC servo kit, MOTORS + DRIVES, LATHE X and Z, removed working | USD 599.00 | |
| 4 Axis 750W AC Servo Motor Driver Kit 2.4NM & Mach3 Motion Controller CNC Mill | USD 1,499.99 | |
| NEW 220V 3.8KW 15NM AC Servo Motor With Brake Driver Kit 2500RPM NEMA52 3M Cable | USD 746.51 | |
| 400W 1.27NM CNC AC Servo Motor NEMA24 220V Servo Driver Controller Kit 3000RPM | USD 339.99 |
Decision matrix
| Scenario | Best-matched package |
|---|---|
| Lathe X/Z retrofit | Yaskawa 2-axis motor/drive set |
| Multi-axis mill with Mach3 | ToAuto 4-axis package |
| Vertical-axis holding torque | Brake-equipped high-torque servo kit |
| Compact/light CNC work | Yifeng compact servo kit |
Product notes
Yaskawa 2 axis AC servo kit, MOTORS + DRIVES, LATHE X and Z, removed working
This listing is a used working pull from a Hyundai KIT30 CNC lathe, not a new retail box. It includes two Yaskawa 850W servo motors (X with brake, Z without) and LG-built servo drives made under license from Yaskawa, plus two stainless-steel leaf couplings sized for 25mm ballscrews. For a lathe retrofit where you already have 25mm screws, that gives you matched motors, drives, and couplings in one used set. The 200V nominal input and 1500 rpm motor speed are the key compatibility checks before purchase. The practical limitation is the used condition and the specific two-axis scope: this is not a generalized four-axis bundle, and you should confirm that the X/Z configuration matches your machine's existing layout.
4 Axis 750W AC Servo Motor Driver Kit 2.4NM & Mach3 Motion Controller CNC Mill
This is a new four-axis grouping: four 750W servo motors with drivers plus a 4-axis Mach3 motion controller in one package. The model designation points to 90st-m02430-style units with a Mach3 controller, and the description positions it for CNC machining equipment, food processing machinery, and similar automation. If you are building or converting a mill and want the controller included, this is the most complete multi-axis starting point among these listings. The limitation is the top listed price and the input requirement: the description lists 220V input in a 1HP/3PH configuration. You need a machine and control approach that can use all four axes, and the setup is more involved than a single-axis test bench.
NEW 220V 3.8KW 15NM AC Servo Motor With Brake Driver Kit 2500RPM NEMA52 3M Cable
For heavy automation tasks, this NEMA52 servo kit delivers 3.8kW and 15 N.m rated torque at 2500 rpm, with a brake built into the motor. That makes it a strong candidate for a vertical axis or any load that needs to hold position when power is removed. The new bundle includes the driver and a 3-meter cable set, so it arrives as a complete single-axis servo drive+motor pair. The limitation is that you are buying one motor/driver pair, not a multi-axis set, and the 220V input plus 3.8kW output require a machine and wiring that can handle that power. For lighter retrofits, this would be overkill.
400W 1.27NM CNC AC Servo Motor NEMA24 220V Servo Driver Controller Kit 3000RPM
The Yifeng kit is the smallest package here, with a NEMA24 400W motor, 1.27 N.m rated torque, 3000 rpm, and an IP65-rated enclosure. It supports position, speed, and torque control modes, and the driver lists MODbus communication with RS485 as standard. Three-meter power and encoder cables are included. That makes it a convenient new package for a compact CNC axis or a lighter automation task where you do not need a large motor. The limitation is the power level: 400W and 1.27 N.m is best for lighter loads, not heavy milling or large gantries. If your project is small and you want the lowest listed entry price, this is the one to start with.
Final recommendation by use case
The roughly $1,160 listed-price spread between the four kits makes the decision mostly about machine size and axis count. For a lathe X/Z retrofit, the Yaskawa set at $599.00 is the most complete used option because it includes matched motors, drives, and couplings for 25mm ballscrews. For a new multi-axis mill, the ToAuto package at $1,499.99 gives you four servo axes plus a Mach3 controller in one purchase. For vertical-axis holding or high-torque automation, the brake-equipped kit at $746.51 offers the highest rated torque among these kits plus a holding brake. For a compact or light CNC job, the Yifeng kit at $339.99 is the lowest-listed-price way to get a new 220V servo package with MODbus support.
