NSK Roller Bearings for Industrial Motors
NSK roller bearings for industrial motors are engineered to meet the rigorous demands of modern electric drive systems, including high-efficiency (IE3/IE4) motors, inverter-fed drives, and servomotors. As industrial motors become more compact and powerful, the requirements for rolling bearings have shifted towards higher load capacities, reduced energy loss, and extended maintenance intervals. Corsair Sarl provides a comprehensive range of NSK motor-grade bearings, including the reinforced NSKHPS series, ceramic-coated variants for electrical insulation, and Creep-Free designs to prevent housing wear. Our Swiss-based team offers expert technical support to ensure you select the optimal bearing for your motor’s specific speed and load profile.
Contents & Menu
Applications and Use
NSK roller bearings are specifically designed for the rotating components of industrial motors to ensure smooth and quiet operation.
Common applications include:
General Industrial Motors
Standard high-reliability applications.
High-Efficiency Motors
Requiring low friction to minimize energy loss.
Inverter-Fed Motors
Requiring protection against electrical erosion.
EV and Servo Motors
Designed for high-speed rotation and frequent start-stop cycles.
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Quick Selection: Series and Features
NSKHPS (High Performance Standard)
Reinforced series offering up to 60% longer service life and 15% higher limiting speeds compared to standard cylindrical roller bearings. Best for motors requiring compact size with higher load-bearing capabilities.
Ceramic Coated (HDY2)
Features an insulating ceramic coating on the outer ring to prevent electrical current from flowing through the bearing, eliminating elektroerosion in large inverter-fed motors.
Creep-Free
Equipped with O-rings on the outer ring to limit clearance between the bearing and the housing, preventing ‘creeping’ or relative movement that causes housing wear.
Standards, Naming, and Identification
NSK motor bearings use standardized ISO dimensions but include specific motor-grade suffixes.
How to identify your motor bearing:
Basic Code: Indicates type (e.g., NU for cylindrical roller) and series (e.g., 308).
Internal Design: E suffix denotes a design optimized for high load ratings.
Cage Suffix: W (Steel), M (Brass), T7 (L-PPS Plastic), or T (Polyamide).
Clearance Suffix: CM (Specific for electric motors) or C3 (Greater than standard).
Feature Suffix: HDY2 (Ceramic Coated) or CX (Creep-Free).
Materials and Specialist Options
STANDARD (Z-Steel)
NSK’s vacuum-degassed ultra-pure steel increases bearing life by up to 80%.
PLASTIC CAGES (T7 / T85)
Lightweight materials like Nylon 4,6 (T85) or L-PPS (T7) provide low friction and high thermal resistance, essential for high-speed EV and servo motors.
SPECIALIsED GREASES
LGU: Low particle emission grease, preventing encoder contamination in servo motors.
EA9: Optimized for high-efficiency motors, more than doubling maintenance intervals compared to lithium soaps.
How to Request a Quote Quickly
To receive a fast and accurate quote, please provide:
- Bearing Reference Code: (e.g., NU308 E T7 C3).
- Motor Type: (Standard, High-Efficiency, or Inverter-fed).
- Environment: Operating temperature and any electrical exposure.
- Quantity and Delivery: Required units and Swiss delivery location.
Service Note: Swiss stock items are available for same-day dispatch on stock items.
Technical Specifications
NSKHPS Cylindrical Roller Bearings (Common Sizes)
Radial Internal Clearance for Electric Motors (CM)
Good Practice and Maintenance
FAQ
What is the benefit of the 'CM' clearance suffix?
The ‘CM’ clearance is specifically narrowed for electric motors to ensure quiet operation and accommodate thermal expansion of the motor shaft.
When should I use ceramic-coated bearings?
Use HDY2 (Ceramic-coated) bearings in large inverter-fed motors where electrical currents can pass through the bearing, causing damage known as elektroerosion.
How do NSKHPS bearings differ from standard ones?
The NSKHPS series uses reinforced internal geometry and high-purity steel to provide up to 60% longer life and higher speed ratings.
Can I use Creep-Free bearings in my existing motor housing?
Yes. Creep-Free bearings maintain standard ISO dimensions, allowing them to replace standard bearings without modifying the housing
What grease is best for high-speed servo motors?
NSK LGU grease is recommended; it emits 90% fewer particles than standard greases, protecting sensitive encoders from contamination.
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