MEGAOHM Series

Insulated Bearings MEGAOHMTM Series : Offering Enhanced Safety and Reliability Bearings used in electrical equipment such as motors and power generators tend to exhibit electrical pitting as a result of current leakage. NTN's MEGAOHMTM Series of insulated bearings has been specifically designed to counteract electrical pitting. These bearings are available in both ceramic and resin types suited to a variety of applications. The MEGAOHMTM Series of insulated bearings offers the following unique advantages: ¡Exhibits insulation resistance of at least 100 MΩ at 500 VDC. ¡Available in a wide range...

Insulated Bearings MEGAOHMTM Series Specifications Ceramic Insulated Bearings Resin Insulated Bearings Standard type Outer ring Bearing steel Protecting layer Inner ring Protected type Rolling element Insulating layer Outer ring Rolling element Bearing steel Inner ring Cylindrical Roller Bearing Deep Groove Ball Bearing Cylindrical Roller Bearing Deep Groove Ball Bearing Bearing Numbers Ceramic insulated bearings Resin insulated bearings High voltage resistance 7MP-NU214L1BC4P6 Clearance Cage Bore diameter Dimension series Bearing type 7MC: Protected ceramic layer type with high voltage resistance...

Insulated Bearings MEGAOHMTM Series Dimension Tables for Ceramic Insulated Bearings B2 Cylindrical roller bearing Bearing types Bearing numbers Boundary dimensions Basic load ratings Dynamic Deep groove ball bearing Required shoulder height mm Da max min Collar ring numbers Cylindrical roller bearing Deep groove ball bearing Notes : For bearing clearances and cage types, contact NTN Engineering. The bearing numbers listed here refer to current products. For bearings with other numbers, contact NTN Engineering. 7MC （n）

Insulated Bearings MEGAOHMTM Series Dimension Tables for Resin Insulated Bearings B Cylindrical roller bearing Bearing types Bearing numbers Deep groove ball bearing Required shoulder height mm Da max Basic load ratings Boundary dimensions Cylindrical roller bearing Deep groove ball bearing Notes : For bearing clearances and cage types, contact NTN Engineering. The bearing numbers listed here refer to current products. For bearings with other numbers, contact NTN E

Insulated Bearings MEGAOHMTM Series Typical Applications Electric Motors The insulated bearings MEGAOHMTM Series is widely used in the traction motors of railway cars. The unique knowledge and experience NTN has gained from motor applications in railways- where safety is the No. 1 priority- have contributed to the greatly improved reliability of general-purpose motors. Traction motors Power Generators The insulated bearings MEGAOHMTM Series is also used in wind power generation systems, which are one solution to energy issues such as the prevention of global warming. These bearings contribute...

Insulated Bearings MEGAOHMTM Series Operating Precautions To avoid an accident or failure resulting from damage to insulated bearings, carefully observe the following. • Never drop an insulated bearing or strike it directly with a hammer during installation (Illustrations 1 and 2). • Do not use an insulated bearing if a defect is visible on the surface (Illustration 3) or it has an unusual appearance. • Attaching an electrical conductor to an insulated bearing can lower the bearing’s insulation resistance. • To prevent current flow from the side faces of a bearing, strictly observe the mounting...