High-Performance Spherical and Cylindrical Roller Bearings- NSKHPS
The NSKHPS (High Performance Standard) series represents the synthesis of NSK technologies in material science, tribology, and precision manufacturing. These bearings are engineered for the most demanding industrial environments- including steel production, mining, construction, and papermaking- where machine uptime is critical. Whether managing extreme radial loads with cylindrical rollers or compensating for shaft misalignment with spherical rollers, the NSKHPS range delivers significantly higher dynamic load ratings and extended service life compared to conventional designs. Corsair Sarl is a leading supplier of high-quality NSK roller bearings, providing expert support and fast Swiss delivery to meet your specific technical requirements.
Contents
Applications and use
NSKHPS roller bearings are designed to operate under harsh conditions, high speeds, and heavy loads.
Common applications include:
Cylindrical Roller Bearings
Utilised in applications requiring high radial load capacity and suitability for high speeds. Common in gearboxes and electric motors.
Spherical Roller Bearings
Ideal for heavy-duty applications where shaft misalignment or deflection occurs, such as in conveyors, wind turbines, and heavy machinery in mining and construction.
Specific Industries *Steel production (extreme and shock loads)
Papermaking (high speeds and intense heat).
Mining and construction (tough environmental conditions).
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Technical Overview: Cylindrical vs Spherical
Cylindrical Roller Bearings
These bearings feature optimized internal geometry to provide higher load-carrying capacity. They are available in several standard types based on rib configurations:
- NU: Outer ring with two ribs, inner ring without ribs. Allows axial displacement in both directions.
- NJ: Outer ring with two ribs, inner ring with one rib. Can locate the shaft axially in one direction.
- NUP: Outer ring with two ribs, inner ring with one rib and a loose rib washer. Locates the shaft axially in both directions.
Spherical Roller Bearings
Designed for the most arduous tasks, these bearings are self-aligning.
- High Load Capacity: Optimized internal design for maximum power density.
- Temperature Stability: Dimensional stability at operating temperatures up to 200°C.
- Misalignment Compensation: Capable of handling fluchting errors (misalignment) without compromising service life.
Standards, Naming, and Suffixes
How to identify your bearing(s)
To ensure the correct replacement is selected, please check the following:
- Basic Code: Identifies the series and bore (e.g., NU308 or 23236).
- Bore Reference: The last two digits multiplied by 5 gives the bore diameter in mm (e.g., ‘08’ = 40 mm).
- Internal Design (E/EA/CA): Indicates high-capacity designs.
- Cage Material: Suffixes such as M, EM, EW, ET, or ET7.
- Clearance: CN (Standard), C3, or C4 (Internal clearance).
Materials and Cage Options
The performance of NSKHPS bearings is heavily influenced by cage selection:
EM Series (Brass)
Features a one-piece, roller-guided machined brass cage. FEM analysis shows a 50% reduction in maximum notch stress compared to conventional cages, resulting in lower heat generation and quieter running.
EW Series (Steel)
A high-strength, one-piece pressed steel cage. It provides up to 25% higher limiting speeds and 60% higher dynamic load ratings than traditional steel cages.
ET/ET7 (Polymer)
Polyamid (ET) is suitable for standard temperatures up to 120°C. L-PPS (ET7) is abriebfest (wear-resistant) and stable up to 200°C, making it ideal for screw compressors.
How to Request a Quote Quickly
To receive a prompt and accurate quote from our Swiss team, please provide the following details:
- Full bearing reference (e.g., NU308 ET7 C3 &).
- Quantity required.
- Application environment (e.g., operating temperature, presence of chemicals).
- Bore type (Cylindrical vs Tapered).
- Required delivery date.
Call for availability and a quote
Phone: +41 32 737 70 60
Email: sales@corsairsarl.com
Opening hours: Monday – Friday, 8:00 am – 5:00 pm
Technical Specifications
- Precision Handling: High-performance bearings should remain in their original packaging until installation to prevent contamination.
- Lubrication: Use the correct grease or oil as specified by the OEM. NSKHPS spherical bearings often include the ‘E4’ suffix, indicating a lubrication groove and holes for efficient relubrication.
- Alignment: While spherical roller bearings tolerate misalignment, ensuring precise housing alignment will further extend the service life.
- Temperature Monitoring: Note that while these bearings can handle up to 200°C, the choice of cage (e.g., Polyamid vs Brass) and lubricant must be compatible with the operating temperature.
FAQ
What is the benefit of the NSKHPS series?
It is NSK’s ‘High Performance Standard’. For spherical roller bearings, it can double the service life compared to conventional bearings. For cylindrical rollers, it offers up to 60% more life and significantly higher load ratings.
Can I replace a standard bearing with an NSKHPS variant?
Yes, they follow standard ISO/DIN dimensions. However, because they offer higher performance, they may allow for ‘downsizing’ of equipment or longer maintenance intervals.
What does the suffix ‘E4’ mean on my spherical roller bearing?
It signifies that the outer ring has a circumferential lubrication groove and lubrication holes to facilitate maintenance.
Which cage should I choose for high-speed applications?
For cylindrical bearings, the EW (Steel) or EM (Brass) cages are optimized for high speeds. For specialized environments like compressors, the L-PPS (ET7) plastic cage is recommended for its chemical resistance and stability.
Are NSKHPS bearings suitable for high temperatures?
Many variants are dimensionally stable up to 200°C. However, ensure the cage material (avoid Polyamid ET for these levels) and lubrication are also rated for such temperatures.
Related Products
Call for availability and a quote
Phone
+41 32 737 70 60
Email
sales@corsairsarl.com
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Monday – Friday, 8:00 am – 5:00 pm
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