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Your benefits

Versatile application
because the surface and corrosion protection allow our drives to be used in a wide range of extreme conditions.

Durable drives
because the preventive measures are tailored to your application and reliably protect your drives against external influences.

Durable drives with preventive measures up to OS4

Our gear units and motors can provide additional protection against typical corrosive agents in industrial environments, such as moisture, oils, dirt and chemicals, than what is provided as standard. Additional treatments and special materials allow these devices to be used even in extreme conditions. Use our drives in any atmosphere, from those with low moisture and contaminants to environments with regular wet cleaning using acidic and caustic agents.

Our surface protection levels range from standard to levels OS1* to OS3*. With the ASEPTICplus® package, OS4* is set as standard.

The XCO® drive package is even going further. The innovative tin-nickel surface protection prevents coating from coming off and provides a stainless steel like appearance. This XCO® surface protection is an essential feature of the XCO® drive package. In addition, the XCO® drive package includes among others stainless steel screws, IS connectors, and motors in IP69K degree of protection.

*Similar to corrosivity categories C1 (negligible) to C5-I / C5-M (very high).


It is not only our standard components for which optional preventive measures are available. Our aseptic motors of the DAS.. series with XCO® and ASEPTICplus® drive packages are optimized for use in sensitive, hygienic production areas. Our stainless steel gear units of the RES.. and KES.. series complete the range of products for cleaning-intensive areas. The surface made of high-quality stainless steel is resistant to acid and alkaline, and is easy to clean.


XCO® drive package

In our XCO® (eXtreme Corrosion Option) drive package, we offer a surface protection specifically intended for the food and beverage industry to protect your drives and products even in extreme ambient conditions.

XCO® is an innovative tin-nickel surface protection that is extremely corrosion resistant and at the same time food safe. The surface is scratch-resistant and has a hardness of 645 HV. Never again coating coming off!


Find out more about the various surface protection options. Sample applications help you to select the right protection option for your gear unit or motor.

Contact form Worldwide locations SEW Help – Weekend support
  • All retaining screws that must be loosened during operation are made of stainless steel.
  • The nameplates are made of stainless steel. Various motor parts are coated with a finishing varnish.
  • Flange contact surfaces and shaft ends are treated with a temporary rust preventive.
  • Clamping straps as additional measures for brakemotors

Instead of standard surface protection, motors and gear units are optionally available with OS1, OS2, OS3 or OS4 surface protection. This equips the gearmotors for use in different ambient conditions.

You can also choose additional special measure “Z.” This means that large contour recesses are filled with rubber before painting.

Surface protection   Ambient conditions/sample applications
Standard standard For machines and systems within buildings and interior rooms with neutral atmospheres.
  • C1 (negligible)*
Sample applications:
  • Machines and systems in the automotive industry
  • Conveyor systems in logistics areas
  • Conveyor belts at airports
OS1 OS1 For environments prone to condensation and atmospheres with low humidity or contamination. E.g. outdoor applications under a roof or other protection device.
  • C2 (low)*
Sample applications:
  • Systems in saw mills
  • Hall gates
  • Agitators and mixers
OS2 OS2 For environments with high humidity or moderate atmospheric contamination. E.g. applications outdoors subject to direct weathering.
  • C3 (moderate)*
Sample applications:
  • Applications in amusement parks
  • Aerial tramways and chair-lifts
  • Applications in gravel plants
  • Systems in nuclear power plants

OS3 OS3 For environments with high humidity and occasionally severe atmospheric and chemical contamination. Occasional acidic or caustic wet cleaning. Also for applications in coastal areas with moderate salt load.
  • C4 (high)*
Sample applications:
  • Sewage treatment plants
  • Port cranes
  • Mining applications
OS4 OS4 For environments with permanent humidity and severe atmospheric or chemical contamination. Regular acidic and caustic wet cleaning, also with chemical cleaning agents.
  • C5-I / C5-M (severe)*
Sample applications:
  • Drives in malting plants
  • Wet areas in the beverage industry
  • Conveyor belts in the food industry

Aseptic motors of the DAS.. series
OS2-OS4 as needed
OS2-OS4 Suitable for dry or wet hygienic areas with average atmospheric contamination. Also suitable for particularly dusty environments.
  • C3 (moderate)*
Sample applications:
  • Applications in clean rooms
  • Machines in the cosmetic and pharmaceutical industry
  • Systems for processing grains and flour (without explosion protection)
  • Conveyor belts in cement plants

Aseptic motors of the DAS.. series with ASEPTICplus® drive package  OS4 with ASEPTICplus® For hygienic areas in the food and beverage industry with permanent humidity, regular acidic or caustic wet cleaning with chemical agents and pressure cleaning.
  • C5-I (severe)*
Sample applications:
  • Hygienic and aseptic conveyors in the beverage industry
  • Systems in cheese dairies and meat processing plants
  • “Splash zones” in the food industry
Aseptic motors of the DAS.. series with XCO® drive package XCO drive package For hygienic areas in the food and beverage industry with permanent humidity, regular acidic and caustic wet cleaning using chemical cleaning agents, and cleaning with pressure load.

XCO®: The new tin-nickel surface protection:
  • No coating can come off
  • Appearance like stainless steel
  • C5-I (severe)*
Sample applications:
  • Hygienic and aseptic conveyors in the beverage industry
  • Systems in cheese dairies and butcher shops
  • „Splash zones“ in the food industry
High-protection coating
HP200
HP200 Suitable for hygienic areas in the food and beverage industry with regular acidic or caustic wet cleaning. Anti-stick properties support the cleaning process even in inaccessible areas.
Sample applications:
  • Hygienic and aseptic conveyors in the beverage industry
  • Systems in cheese dairies and meat processing plants
  • “Splash zones” in the food industry
Stainless steel gearmotor Stainless steel Suitable for hygienic areas in the food and beverage industry with permanent humidity and regular acidic and wet cleaning with chemical cleaning agents.
Sample applications:
  • Hygienic and aseptic applications of all types
  • Systems in cheese dairies and meat processing plants
  • Food processing machines for the North American market