Choosing between two servo motors means deciding what your axis actually needs: a motor that can survive washdowns, or a complete motor-and-drive setup that can hold position when power drops. The Kollmorgen AKMH33E-CNSNGF03 and the Yifeng Brake AC Servo Motor 1KW 4NM NEMA32 package sit at opposite ends of that decision, both in price and in what they bring to the workbench.
Quick Verdict
For most buyers, the decision comes down to whether you already own a servo drive and need a rugged motor (Kollmorgen) or want a braked motor plus drive amplifier ready to wire into a 220V CNC or milling axis (Yifeng). The Kollmorgen costs $286.99 less, but the Yifeng product name pairs the motor with a drive amplifier and a brake, which could save you time sourcing those components separately.
Comparison at a Glance
| Product | Listed Price | Condition | Key Highlights |
|---|---|---|---|
| Kollmorgen AKMH33E-CNSNGF03 | USD 250.00 | New - Open box | IP69K high-pressure water protection, stainless steel construction, insulation class F |
| Yifeng Brake AC Servo Motor 1KW 4NM NEMA32 | USD 536.99 | New | 1 kW power, 4 Nm torque, brake, NEMA32 frame, drive amplifier, 220V rated input |
Where Each Product Wins
Kollmorgen wins on price and environmental sealing. The IP69K rating means it is built to handle high-pressure, high-temperature water - a standout if your machine gets washed down. At $250.00, it is also the lower-priced option by a clear margin.
Yifeng wins on being a more complete motion package. The product name explicitly includes a brake and a drive amplifier, and the description notes support for position, speed, and torque modes with MODbus communication. That makes it a stronger candidate for a CNC Z axis where holding position at power-off matters.
Product Notes
Kollmorgen AKMH33E-CNSNGF03 Stainless Steel Servo Motor
This is the motor to pick when your priority is a sealed stainless steel unit with IP69K protection against high-pressure, high-temperature water. The listed price is $250.00, which makes it the lower-cost option here. The insulation class F and protection against most wires and screws are useful details for industrial settings. One thing to keep in mind is that the specifications focus on environmental protection rather than power, torque, or speed figures, so if you're comparing output capabilities, you'll need to match those numbers against your application. The condition is described as new open-box, meaning the unit is unused but the original packaging may not be intact.
Yifeng Brake AC Servo Motor 1KW 4NM NEMA32 Drive Amplifier 220V CW/CCW Z Axis Milling
If you're building a Z axis for a mill or retrofitting a CNC machine, this Yifeng package is designed to simplify wiring: the product title includes the drive amplifier, and the description notes support for position, speed, and torque modes, along with MODbus communication over RS485 (with RS232 available on request). The motor carries 1 kW power, 4 Nm rated torque, 12 Nm peak torque from the attributes, and a built-in brake that helps hold the axis when power is off. Rated for 220V single/three-phase input and 2500 rpm, it's aimed at machines that already run on common shop voltage. The trade-off is the price: at $536.99, it costs $286.99 more than the Kollmorgen, so you're paying for the added drive, brake, and communication features.
Final Choice by Use Case
Choose the Kollmorgen if your priority is a washdown-rated stainless steel servo motor and you have a drive already matched to it. Choose the Yifeng if you're wiring a new 220V CNC/milling axis and want the brake, drive amplifier, and communication options in one package.
