When you're putting together a servo stepper motion control setup, the first fork in the road is whether you need one powerful braked axis or a package that can move a CNC frame together. The four listings here show both approaches: a 3.8kW 15Nm braked AC servo motor with driver, a second listing of the same kit, a 1.2kW NEMA42 bundle, and a 750W package with a Mach3 motion controller in the title.
Quick take
If you're adding a single rotary axis or a heavy spindle axis and need holding torque after power-off, the braked servo kit is the highest-torque option in this group. If you need coordinated motion across multiple axes, the multi-axis kits sit in the upper part of the price range. The two braked servo listings carry the same title and model, but they list different prices; the lower-priced entry is the one that starts this comparison.
Listed price comparison
| Option | Listed price | Price bar |
|---|---|---|
| NEW 220V 3.8KW 15NM AC Servo Motor With Brake Driver Kit 2500RPM NEMA52 3M Cable | USD 746.51 | |
| NEW 220V 3.8KW 15NM AC Servo Motor With Brake Driver Kit 2500RPM NEMA52 3M Cable | USD 751.51 | |
| 3Axis AC Servo Motor Driver Kit 1.2KW 4Nm Servo Motor NEMA42 Power&Encoder Cable | USD 1,499.90 | |
| 4 Axis 750W AC Servo Motor Driver Kit 2.4NM & Mach3 Motion Controller CNC Mill | USD 1,499.99 |
Decision matrix
| If you need... | Consider... |
|---|---|
| A single servo axis | The lower-priced servo kit listings |
| A bundled set with several motors | The upper-priced combo kits |
| A controller in the same package | The listing that names a motion controller |
Product notes
#### NEW 220V 3.8KW 15NM AC Servo Motor With Brake Driver Kit 2500RPM NEMA52 3M Cable (USD 746.51)
This is the lower-priced listing for the 220V 3.8kW braked servo kit. The title is built around a NEMA52 frame motor with a 3.8kW power rating, 15Nm torque, and a 2500RPM rated speed, paired with a driver. If your immediate need is a single axis that can hold position with a brake and deliver high torque, this kit is the one to compare against. The listing shows the model as 130st-m15025-BZ and a 220V input. The limitation is the axis count: it's a one-axis kit, so a build with more than one axis would require a separate kit for each motor, which pushes total cost well beyond the bundled kits listed here.
#### NEW 220V 3.8KW 15NM AC Servo Motor With Brake Driver Kit 2500RPM NEMA52 3M Cable (USD 751.51)
This listing carries the same title and model as the USD 746.51 entry, with a listed price of USD 751.51. What sets it apart is the package list: it names the motor and driver plus a 3M encoder cable, 3M power cable, brake cable, serial cable, and resistance. If you want a single listing that spells out each cable you'll receive with the kit, this version gives you that detail in writing. The trade-off is that the listed price is USD 5.00 higher than the other listing for the same 130st-m15025-BZ model. When the specs are identical, the lower listed price is a straightforward point of comparison for your budget.
#### 3Axis AC Servo Motor Driver Kit 1.2KW 4Nm Servo Motor NEMA42 Power&Encoder Cable (USD 1,499.90)
This Yifeng kit is the 3-axis entry in the group. The title names three servo motors with drivers, a 1.2kW power rating, 4Nm torque, NEMA42 frame size, and power and encoder cables. For a build that needs three coordinated axes, this bundle lets you buy all three motors and drivers as a set instead of sourcing each axis separately. The listing also shows a rated speed of 3000RPM and a nominal input voltage range of 180V to 240V, which fits the 220V-class systems common in CNC equipment. The limitation comes down to price and scope: at USD 1,499.90 it sits at the same level as the 4-axis kit, which lists four axes and a Mach3 motion controller in its title.
#### 4 Axis 750W AC Servo Motor Driver Kit 2.4NM & Mach3 Motion Controller CNC Mill (USD 1,499.99)
This ToAuto kit is the only listing in the comparison that includes Mach3 Motion Controller in its title. It bundles four 750W AC servo motors with 2.4Nm torque each, plus drivers, and the title points to CNC mill use. If your machine needs four axes and you want the motion controller listed as part of the kit, this is the listing where that appears. The listed price is USD 1,499.99, which is the highest in this group, but it is only USD 0.09 above the 3-axis kit. The trade-off is per-axis torque: 2.4Nm is lower than the 15Nm braked single-axis motor, so this kit is better suited to coordinated multi-axis motion than to a single axis requiring heavy cutting torque.
Final recommendation by use case
For a single-axis upgrade, the lower-priced braked servo kit is the natural starting point; the higher-priced same-title listing is worth it if you want the included cable package written out. For a multi-axis machine, the two upper-priced kits both deliver a full set of motors and drivers. If a motion controller is a must-have in the kit, the ToAuto package is the one that lists it in the title.
