INDUSTRIAL MOTOR BEARINGS

NSK Solutions for Industrial Motor Needs Outer Ring/Inner Ring NSK's Response CeramicCoated Insulated Bearings P. 12 – 13 Encoder error and brake slip Improved fretting resistance Reduced rotating resistance Longer maintenance intervals Longer seizure life Vibrating and unbalanced loads Improved creep resistance Electical erosion Maintenance-free operation High-speed rotation Longer seizure life Longer maintenance intervals Longer seizure life High-speed rotation and unbalanced loads HighEfficency Motors Longer seizure life Reduced motor loss Longer maintenance intervals Improved reliability...

Bearing Components Ball Ceramic Balls P. 18 – 19 Cage SeizureResistant Heat-Treated Steel Balls P. 14 – 15 Plastic Cages for EV Motors P. 14 – 15 Plastic Cages

High-Reliability EA7 Grease for Servomotors Machine tools, robots, and carrier equipment require servomotors to endure repeated start/stop/reverse operations under harsh conditions with microvibrations caused by slight positioning errors during servo-lock. These conditions may lead to an insufficient oil film on the bearing raceway surface, resulting in fretting damage. In response, NSK developed EA7 grease with excellent fretting resistance, long life, and improved reliability. Features Better Reliability Under Harsh Operating Conditions 1.5 Test Bearing Vibration Ratio EA7 grease improves fretting...

Low-Particle-Emission LGU Grease for Servomotors LGU grease features an optimized grease composition free of sulfur and metal elements. This greatly reduces particle emissions, helping to prevent encoder contamination and brake slip. Features Less Encoder Contamination and Brake Slip emissions than conventional lithium-soap grease. Tested bearings: ø 8 × ø 22 × 7 Grease Fill: Light (L) Rotational Speed: 1 800 min-1 Particle Size: Over 0.1 μm 100000 Emitted Particle Count Per 0.01 Cft LGU grease has nearly 90% less particle Conventional lithium-soap grease Bearings with LGU grease realize a grease...

Low-Particle-Emission DW Seal for Servomotors Light-contact DW seals have an optimized seal lip structure that prevents grease from leaking from the bearing and realizes low torque. These features help prevent encoder contamination and brake slip in servomotors. Features Light-Contact Seal Lip A special seal lip structure lowers lip pressure, resulting in low torque. The main lip has outward contact with the beveled portion of the inner ring seal groove. This prevents the seal from opening due to internal pressure and prevents grease leakage. Grease Leaking Ratio Tested Bearings: ø 17 × ø 26...

Example Bearing Designation 6203 LGU/EA7 LGU/EA7 Grease Radial Clearance DW Seal Cage Basic Designation Boundary Dimensions (mm) Bore Dia. Boundary Dimensions (mm) Outside Dia. DW seals are made of nitrile rubber (operating temp: -30 to 110 °C)

Low Torque & Long-Life Bearings for High-Efficiency Motors NSK optimized the type of grease and fill amount, grease shear, and agitation resistance during bearing rotation to not only realize low torque and long life, but also save energy. Using a plastic cage allows for even lower torque and longer life. Our new specification steel cages achieve 60% less mechanical loss than conventional products. For even less mechanical loss, new plastic cages achieve a huge 80% reduction. Motor Mechanical Loss Ratio Increases Motor Efficiency New Spec. New Spec. (Steel Cage) (Plastic Cage) Longer Motor Maintenance...

Example Bearing Designation 6305 K Fill Code EA9 Grease Radial Clearance Seal/Shield Basic Designation Grease Fill Code Grease Fill Code *The filling code indicates how much grease should be applied into the bearing, in increasing quantity from K to L to S. For low torque specifications, K or L fills are recommended.

Ceramic-Coated Insulated Bearings for Inverter Motors By coating the outer ring with insulating ceramic material, electric current cannot pass through the bearing and cause electrical erosion. Features A Solution to Electrical Erosion in Large Motors We've enhanced the ceramic coating to dramatically improve insulation performance over regular ceramic-coated bearings. 10000 Tested bearings: 6311 Frequency: 1 MHz General CeramicCoated Bearing General CeramicCoated Bearing General CeramicCoated Bearing Insulation Breakdown Voltage Easy to Handle and Mount 4.0 Optimized specifications make the impact...

Reduced Premature Motor Failure From Bearing Heat Generation Temperature Rise of Ceramic-Coated Brg. dissipates heat. Our optimized ceramic coating more effectively Heat Dissipation Test Results Example Bearing Designation 6218 C3 Radial Clearance Ceramic-Coated Insulated Basic Designation • isted bearings are offered as standard open bearings with C3 L clearance. • lease handle ceramic bearings with the same care as standard bearings. P • Be sure to avoid strong impacts to the outer ring when mounting the bearing using methods involving a hammer or similar. Excessive impacts may cause breaking...

Electric Vehicle (EV) Motor Bearings NSK bearings improve the high-speed rotation performance of EV motors by utilizing a plastic cage, specialized grease, and steel balls heat-treated to resist seizure. Today's applications cause bearings to face high temperature and speeds. In response, our plastic cages feature excellent heat resistance. We also examined cage strength through our proven analysis technologies to optimize the shape of the cage. Tested bearings: ø 20 × ø 47 × 14 Rotational speed: 3 000 min-1 Heat Generation Ratio Plastic Cage for High-Speed Rotation Steel Cage Comparison of Heat...

Example Bearing Designation 6206 EA9 Grease for High-Speed Rotation Clearance Seals/Shields Plastic Cage Special Heat-Treated Steel Balls Creep-Free Basic Designation Boundary Dimensions (mm) Designation Seizure-Resistant HT Ball Spec n' (Seizure-Resistant HT Ball Spec.) • lastic cages for EV motors use T85 (Nylon 4,6). P • Please contact NSK regarding reduction gear bearings