KIZEI - Shielded spherical roller bearings, compliant with ISO dimensions

NTN-SNR's R&D department has developed a solution that extends the service life of spherical roller bearings. KIZEI series bearings this is real support intended especially for polluted environments.

Innovation and performance in the most difficult conditions:
KIZEI spherical roller bearings, a new innovative solution from the NTN SNR brand, stand out on the market with their excellent performance and durability. Designed for extreme conditions, KIZEI bearings are used in applications with the highest requirements and high pollution, i.e. quarries, mines, cement plants, where they are installed, among others. in belt conveyors. 

Characteristics of KIZEI NTN SNR spherical roller bearings:
The characteristics of KIZEI bearings are, firstly, compliance with ISO dimensions and, secondly, metal covers. KIZEI bearings are the result of thorough research, with design focusing on achieving an extended service life. The seals used in the bearings - metal shields - effectively protect against contamination while keeping the lubricant inside the bearing.
Kizei bearings are also characterized by advanced materials: the cages are made of high-quality nitrided steel, which makes the bearings resistant to shock and corrosion. Their dimensional stability of 200 degrees Celsius allows operation in a wide temperature range, from -40 to 200 degrees Celsius.

Benefits for the customer:

• Performance optimization:Correctly selected KIZEI spherical roller bearings perfectly increase the efficiency of the machines in which they are installed. Longer service life and reliability of machines translate into reduced risk of downtime.
• Lower operating costs:Tests carried out in various conditions, including: in mines and cement plants, showed that KIZEI bearings work longer and require less service, which results in a significant reduction in operating costs.

Installation and lubrication:
KIZEI spherical roller bearings are easy to install, require standard tools and can be used with traditional accessories. NTN SNR supplies bearings unlubricated and recommends filling 30% of the free space with a suitable lubricant during initial lubrication.
 

COMPARING PERFORMANCE WITH BEARINGS WITHOUT COVERS

Based on the internal analysis of the NTN-SNR laboratory, the most important causes of machine failure were determined:

• 21% of failures due to solid impurities
• 13% of failures due to lubrication problem

KIZEI BEARINGS PROVIDE:

• Effective protection against external solid pollutants.
• Better retention of grease inside the bearing.
• ISO dimensions match those of open spherical roller bearings for easy replacement.

KIZEI TECHNICAL FEATURES:

1. LOADS AND SPEEDS

• Designed and manufactured to NTN's premium specifications.
• 100% European production.
• Meets the most stringent quality requirements.

2. ISO

DIMENSIONS

• Same width as open spherical roller bearing.
• 100% interchangeable with open spherical roller bearing.
• Can be installed in narrow housings.

3. BASKET AND COVER MADE OF HIGH QUALITY NITRIDED STEEL

• Maximum shock resistance.
• Optimized corrosion resistance.

4. WIDE RANGE OF OPERATING TEMPERATURE

• Same temperature range as for an open spherical roller bearing (-40°C to +200°C).
• Dimensional stability up to + 200°C.

5. EASY LUBRICATION

• Supplied without grease.
• Pre-lubrication process similar to that of an open spherical roller bearing.
• Possible lubrication during operation thanks to special holes and grooves on the outer ring.

6. OPTIMAL TILT

• Similar to an open spherical roller bearing.
• Internal inspection possible for easier maintenance.

7. EASY INSTALLATION

• No special tools required. Standard bushings, nuts and mounting washers can be used.
• Possibility to check internal clearance after installation.

In short, KIZEI spherical roller bearings are not only durable and efficient, but also bring real economic benefits by minimizing service costs and machine downtime. NTN SNR, by introducing this innovative series, emphasizes its commitment to providing components of the highest quality and durability.