SKF INSOCOAT insulated bearings: electrical corrosion resistance

INSOCOAT insulated bearings from SKF are resistant to galvanic corrosion in a variety of environments, including high humidity. Sealed protective coatings on the outer or inner ring integrate insulating properties into the bearing to eliminate premature bearing failure caused by stray currents in various applications including: Industrial motors Traction motor generators Premium coating SKF INSOCOAT Bearings are coated with a high-quality alumina insulating coating using a complex plasma spray process that provides the following benefits: Resists common media used in each bearing application Provides protection over a wide operating temperature range Minimum resistance 200 M (Table 1) Tested to withstand voltages up to 3,000 V DC (if you need a coating that withstands higher voltages, we can supply it on request) Protective sealants Plasma sprayed coatings are generally hygroscopic, so condensed moisture can easily penetrate the coating . INSOCOAT bearings use a unique sealant that prevents this from happening. Engineering Support SKF can provide you with relevant electrical parameter values u200bu200bfor your bearings so you can choose the best insulation solution for your needs. Global Service INSOCOAT bearings are stocked in the most common sizes and variants (single row deep groove ball bearings and single row cylindrical roller bearings). We can also provide customized bearings and product ranges upon request. Performance data, dimensions and rotational accuracy are the same as for non-insulated bearings (table 2). Table INSOCOAT Bearing Specifications, T≤40C, rH≤60% SKF Bearing Model Suffix Breakdown Voltage Minimum Resistance [V] DC [M] Outer Ring Coating Inner Ring Coating SKF Standard Coating VL0241 VL2071 3 000 200SKF Advanced Coating VL0246 VL2076 3 000 400 Table 2 INSOCOAT Bearing Data Deep Groove Ball Bearing and Cylindrical Roller Bearing Dimensions Standard Outer Dimensions: ISO 15 Tolerance Standard or higher (according to customer requirements). Value: ISO 492 (for additional information, see SKF catalogue). Alumina coating on the outer surface of the outer ring or inner ring will not affect the accuracy. The standard internal clearance is C3, see if other internal clearances are available. These values u200bu200bapply to new bearings with no measured load before mounting: ISO 5753-1, see SKF product catalogue. Permissible misalignment is the same as for comparable standard bearings.