AKM Washdown (Food) Servomotors (IP67)

The AKM Washdown and AKM Washdown Food servomotors are part of the AKM brushless servo motor family of our manufacturer Kollmorgen . Thanks to a special hygienic coating, stainless steel is only used for the shaft of these hygienic servo motors, which reduces costs while still meeting hygienic standards (up to FDA approval). Together with IP67 seals the AKMW Washdown Servo Motors are suitable for many applications in food, beverage, pharmaceutical and packaging industriy, which are subject to strict hygienic regulations.


Key features of the AKM Washdown servo motors:

  • hygienic coating
  • stainless steel only in shaft, screws and plug connections
  • protection class IP66/IP67
  • optional with brake

The most important features of the AKM Washdown Food series servo motors:

  • food grade
  • FDA-compliant coating and bearing lubrication
  • protection class IP67 design featuring PTFE shaft seal
  • coating resistant to corrosive chemicals including highly alkaline or acidic cleaning products

Suitable Servo Controllers for various supply voltages can be found here:


AKMA lightweight washdown servomotors with hardened, anodized aluminium coating (IP69K)

The AKMA washdown servomotors belong to the AKM family of brushless servomotors from the manufacturer Kollmorgen. The hardened, anodized aluminium coating of the AKMA servo motors offers high chemical resistance in a wide pH range and withstands the usual cleaning agents used in washdown applications. The coating is less susceptible to scratches, dents and chipping paint than conventional coatings. The stainless steel shaft with chrome oxide insert maximizes shaft seal life. The vented design and "one-piece" housing construction eliminates the need for an O-ring and reduces the risk of water ingress.


AKMA servo motors are designed for use in food and beverage processing, pharmaceutical and medical laboratories or outdoor applications such as radar stations and antenna positioners. For this reason, emphasis was placed on a smooth surface for easy cleaning, with tightness class IP69K also for high-pressure cleaning in food applications and also on a round housing design to avoid the accumulation of contaminating droplets.


The light weight of AKMA servo motors makes them easier to install and maintain, while their high torque density in a smaller size improves performance in demanding applications.


The most important features of AKMA Washdown brushless servo motors:


  • four sizes (diameter 79mm, 89mm, 117mm, 137mm)
  • continuous torque from 0.5Nm to 14.5Nm (peak 1.4Nm to 38Nm)
  • hardened anodized aluminium coating
  • 316L stainless steel shaft
  • hybrid plug in stainless steel with integrated Viton seal
  • single-cable solution with Smart Feedback Device, Gen. 3 (SFD3); Hiperface DSL; EnDat 2.2
  • protection class IP69K
  • comply with UL, CE, RoHS and UKCA standards
  • optionally with brake

Please check our Servo Drives options for various supply voltages,feedback interfaces and network options like CANopen or EtherCAT:


AKMH stainless steel servo motors (IP69K)

The AKMH servomotors of our manufacturer Kollmorgen are stainless steel servomotors with IP69K protection, designed to meet toughest hygienic requirements. They are available in sizes 2 to 6, with the AKMH2 being the most compact stainless steel servo motor on the market. Simple and quick cleaning results in higher productivity. They are particularly suitable for use in machine areas with aseptic processes.


Even at the design stage of the AKMH hygienic stainless steel motors, special attention was paid by our manufacturer Kollmorgen to details that make them easy to use in applications with special hygienic requirements, as no complex protective devices are required, especially in open machines with direct food contact and splash zones:

  • smooth surface (with roughness <0.8μm, all radii R1.5) meeting EHEDG & 3A criteria for fast cleaning
  • surface and lasered type plate prevent dirt deposits and thus germs
  • conical end cap, which prevents water accumulation even when mounted vertically
  • IP69K O-ring seals according to EHEDG and 3A hygienic standards
  • single cable for power and encoder, for increased reliability, faster cleaning, and fewer places to harbor pathogens
  • cable designed to elminate the need for conduit
  • optionally with ventilation valve against condensation inside the motor


The most important features of AKMH stainless steel servo motors:

  • protection class IP69K for high pressure cleaning up to 100bar and chemical cleaning (incl. shaft sealing ring and cable outlet)
  • Hygienic standards comply with FDA standards
  • high speeds up to 8,000 rpm
  • torque derating less than 20% compared to standard servo motor with same size
  • 5 sizes with 4 rotor lengths and winding options
  • options for stainless steel brushless servomotors AKMH: brake, ventilation valve, feedback of digital resolver SFD or Hiperface DSL (single cable solution)


The AKMH stainless steel servo motors can be ideally combined with the stainless steel planetary gearboxes for hygienic applications of Rehfuss and with the stainless steel leadscrew and ball screw actuators of the ERD series of Tolomatic.

Of course we also offer suitable Servo Drive / Amplifiers with CANopen or EtherCAT for various supply voltages and for various feedback options:


motor type power continuous torque peak torque max. speed motor diameter
  kW Nm Nm   mm
AKMH2 0.18 - 0.52 0.4 - 1.4 1.6 - 5.5 8000 72.5
AKMH3 0.35 - 0.72 1.1 - 2.5 4 - 10.5 8000 85
AKMH4 0.6 - 1.0 1.7 - 5 6 - 20 6000 114
AKMH5 0.77 - 2.2 4 - 12 13 - 45 6000 132
AKMH6 2.1 - 5.5 10.4 - 21 35 - 79 6000 186