Products

Wide Range of Bearing Products

At Itenum Power Technology, we manufacture a full range of precision bearings designed to meet the demands of modern industrial applications. Whether you need standard catalog sizes or fully customized solutions, our bearing products are built on over 20 years of manufacturing expertise, backed by ISO 9001:2015 quality certification and SGS-verified compliance with EU RoHS and REACH regulations.

Every bearing we produce goes through rigorous inspection processes on our fully automated production lines, ensuring consistent dimensional accuracy, low noise performance, and long service life — batch after batch. From compact miniature bearings for small appliances and medical devices, to heavy-duty roller bearings for industrial machinery and automotive systems, Itenum delivers precision you can rely on, direct from our factory in Cixi, Ningbo — one of China’s most established bearing manufacturing hubs.

We work with buyers across global markets, offering flexible OEM and ODM services to meet application-specific requirements. If a standard product doesn’t fit your needs, our engineering team is ready to develop non-standard solutions tailored to your exact specifications.

Deep Groove Ball Bearings

Deep Groove Ball Bearings are the most widely used type of rolling bearing, characterized by raceway grooves on both the inner and outer rings that are deep relative to the ball diameter. This structural design allows them to support both radial loads and moderate bidirectional axial loads simultaneously, making them suitable for a broad range of general-purpose and demanding industrial applications alike.

Angular Contact Ball Bearings

Angular Contact Ball Bearings are the most widely used type of rolling bearing, characterized by raceway grooves on both the inner and outer rings that are deep relative to the ball diameter. This structural design allows them to support both radial loads and moderate bidirectional axial loads simultaneously, making them suitable for a broad range of general-purpose and demanding industrial applications alike.

Tapered Roller Bearings

Tapered Roller Bearings are a high-capacity rolling bearing type featuring conical (tapered) rollers arranged between tapered inner and outer ring raceways, with all roller axes converging at a common point on the bearing centerline. This geometry allows the bearing to support substantial combined radial and axial loads simultaneously, making it one of the most load-dense bearing types available, particularly well-suited for applications involving heavy loads and moderate-to-high speeds.

Spherical Roller Bearings

Spherical Roller Bearings are a heavy-duty rolling bearing type featuring barrel-shaped (spherical) rollers arranged between an outer ring with a spherical raceway and an inner ring with two raceways, typically in a double-row configuration. The spherical outer raceway gives this bearing type its defining characteristic – self-aligning capability – allowing it to accommodate shaft misalignment and housing deflection while continuing to support substantial combined radial and axial loads.

Thin Section Bearings

Thin Section Bearings are a specialized category of rolling bearings characterized by an exceptionally narrow cross-section relative to bore diameter, typically maintaining a near-constant cross-sectional width across a wide range of bore sizes within the same series. This design enables significant weight reduction, compact installation envelopes, and minimized material usage compared to standard-section bearings of equivalent bore size, making them the preferred solution for applications where space, weight, and precision are simultaneously critical.

Needle Roller Bearings

Needle Roller Bearings are a compact rolling bearing type utilizing long, thin cylindrical rollers (needle rollers) with a small diameter-to-length ratio, arranged radially around the shaft. This design provides high radial load capacity within an extremely small cross-sectional envelope, making needle roller bearings the preferred choice for applications where radial space is severely limited but load support requirements remain substantial.

Cylindrical Roller Bearings

Cylindrical Roller Bearings are a high-capacity radial bearing type featuring cylindrical rollers in line contact with the inner and outer ring raceways, rather than the point contact found in ball bearings. This line contact distributes load over a larger surface area, enabling the series to support substantially higher radial loads than deep groove ball bearings of equivalent size, while maintaining good speed capability.

Thrust Bearings

Thrust Bearings are a category of rolling bearings specifically designed to support axial (thrust) loads acting along the shaft axis, with little or no capacity for radial loading. Unlike radial bearings, the rolling elements in thrust bearings are arranged between two flat or grooved washers (races) oriented perpendicular to the shaft, allowing efficient transfer of axial force between rotating and stationary components.

Industry Applications

Eternum bearings are engineered for the full spectrum of industrial demand — from high-speed electric motors and precision robotics to heavy-duty mining equipment and agricultural machinery. Whatever the operating condition, whatever the load, we have a bearing solution built for it.

Electric Tools

Automotive

Machine Tools

Agriculture Machinery

Food and Beverage

Robotics

FAQs

What loads can deep groove ball bearings handle?

Deep groove ball bearings are primarily designed for radial loads, but they can also handle moderate axial (thrust) loads in both directions. They are not suitable for heavy axial loads or combined shock loads. In those cases, angular contact or tapered roller bearings are preferred.

How do I select the right bearing size for my application?

Selection should be based on bore diameter (shaft size), required load capacity (dynamic rating C and static rating C0), operating speed compared with the bearing limiting speed, available space (outer diameter and width), and required precision grade from P0 to P2. Always apply a safety factor and verify that the calculated L10 service life meets your requirements.

What is the difference between open, shielded (ZZ), and sealed (2RS) bearings?

Open: No built-in protection, requires external sealing, and is suitable for clean environments or oil bath lubrication.

ZZ metal shields: Protect against dust and debris with low friction, making them suitable for high-speed applications, but they are not waterproof.

2RS rubber seals: Provide strong protection against dust and moisture. They are pre-greased and ideal for contaminated environments, but generate slightly more friction.

How often should I lubricate or replace the grease?

For general industrial use, grease should be replenished or replaced every 3,000 to 10,000 operating hours depending on speed, temperature, and environmental conditions. Bearings running above 70 C or in contaminated environments require shorter intervals. Sealed 2RS bearings are pre-greased for life and do not require re-lubrication.

What are the common causes of premature bearing failure?

The most frequent causes include inadequate or improper lubrication, contamination by dirt, dust, or moisture, incorrect installation, misalignment, excessive force during fitting, overloading beyond the rated capacity, improper shaft or housing fits, and fatigue at the end of normal service life.

How is the rated service life (L10) of a bearing calculated?

The basic L10 life is calculated as L10 = (C / P)^3 x 10^6 revolutions, where C is the dynamic load rating in kN and P is the equivalent dynamic bearing load in kN. It represents the number of revolutions that 90% of identical bearings will complete without fatigue failure. In practice, ISO 281 modified life calculations also apply correction factors for lubrication, contamination, material, and reliability.

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ETERNUM POWER TECHNOLOGY