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Product Description Corrosion and surface protection

DR Gearmotor Catalog 2008 - 283 2

OS surface protection In addition to standard surface protection, motors and gear units also have the option ofsurface protection OS1 to OS4. The special procedure Z can also be performed in ad-dition. The special procedure Z means that large surface recesses are sprayed with arubber filling prior to painting.

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Surface protection Layers NDFT
1 on gray-cast iron [ Suitable forStandard

2

4

µ m]

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1 × Dip primer1 × One-pack top coatApprox. 50-70•Normal environmental conditions•Relative humidity below 90 % •Surface temperature up to max. 120 °C •Corrosivity category C1
2

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OS1 1 × Dip primer1 × × Two-packbase coat 1 Two-packtop coatApprox. 120-150•Low environmental impact•Relative humidity max. 95 %•Surface temperature up to max. 120 °C•Corrosivity category C2

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2

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OS2 1 × Dip primer2 × × Two-packbase coat 1 Two-packtop coatApprox. 170-210•Medium environmental impact•Relative humidity up to 100 %•Surface temperature up to max. 120 °C •Corrosivity category C3
2

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OS3 1 × Dip primer2

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× Two-packbase coat2 × Two-packtop coatApprox. 220-270•High environmental impact•Relative humidity up to 100 % •Surface temperature up to max. 120 °C•Corrosivity category C4
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OS4 1 × Dip primer2 × Two-packepoxy base layer2

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× Two-packtop coatApprox. 320•Very high environmental impact•Relative humidity up to 100 % •Surface temperature up to max. 120 °C•Corrosivity category C5-1
2

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1NDFT ( n ominal d ry f ilm t hickness) = Required coating thickness; Minimum thickness = 80 % NDFT; Ma-ximum thickness = 3 x NDFT (DIN EN ISO 12944-5) 2In accordance with DIN EN ISO 12 944-2

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Special protec-tive measures Gearmotor output shafts can be treated with special optional protective measures foroperation subject to severe environmental pollution or in particularly demanding appli-cations.

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Measure Protection principle Suitable forFKM oil seal (Viton)

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High quality materialDrives subject to chemical contamina-tion Kanisil coating Surface coating of the contact surface of the oil sealSevere environmental pollution and in conjunction with FKM oil seal (Viton)

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Output shaft made of stain-less steel Surface protection due to high-quality materialParticularly demanding applications in terms of surface protection

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NOCO

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fluid As standard, SEW-EURODRIVE supplies NOCO

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fluid corrosion protection and lubri-cant with every hollow shaft gear unit. Use NOCO

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fluid when installing hollow shaftgear units. Using this fluid helps prevent contact corrosion and makes it easier to as-semble the drive at a later date.NOCO

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®

fluid is also suitable for protecting machined metal surfaces that do not havecorrosion protection. including parts of shaft ends or flanges. You can also order largerquantities of NOCO

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fluid from SEW-EURODRIVE.NOCO

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fluid is food grade according to USDA-H1. You can tell that NOCO

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fluid is afood grade oil by the USDA-H1 identification label on its packaging.

Catalog – DR Gearmotors 01/2008

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