AC servo motor
Kollmorgen AKM
Kollmorgen's long-running brushless AC servo motor range, spanning eight frame sizes from tiny 40 mm units to 260 mm high-torque motors, with a wide menu of feedback devices and washdown/food-grade options.
Key specifications
| Ingress protection | IP54 standard; IP65 with shaft seal; IP67 washdown / food-grade variants |
|---|---|
| Peak torque (max) | 434 Nm |
| Continuous torque (max) | 180 Nm |
| Speed (max) | 8,000 rpm |
| Power (max) | 19,800 W |
| Frame sizes | 40, 260 mm |
| Supply | AKM1x up to 240 Vac (320 Vdc); AKM2x and larger up to 480 Vac (640 Vdc) |
| Feedback | resolver, commutating encoder, BiSS optical sine encoder, SFD / SFD3 / SFD-M, HIPERFACE, HIPERFACE DSL, EnDat 2.2 (optical and inductive) |
| Frame count | 8 |
Summarised in our own words from Regal Rexnord Corporation's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1
Notes on this data
Selection guide summary says 0.16-180 Nm continuous; spec tables show 0.18 Nm (AKM11B) to 180 Nm (AKM84T). Peak 434 Nm and 19.8 kW are AKM84T at 240 Vac. 'Speeds up to 8000 rpm' is the guide's headline; AKM5-7 rated to 6000 rpm and AKM8 to 3000 rpm.
Specify Motion is not affiliated with Regal Rexnord Corporation. Kollmorgen and AKM are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
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Our experienced engineers are on hand, ready to help with your project. Whether you need the Kollmorgen AKM itself, help sourcing it, or a modified or custom design built around your load, speed and space, tell us what the machine has to do and we'll come back with the right option.
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Tell us about your project and how you use the Kollmorgen AKM: the load, speed, duty and environment. An experienced engineer will review it and reply, normally within one working day.
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