Roller Bearings – Bearings Supplier | SKF NSK THK FAG TIMKEN

Roller Bearings

INA roller bearings are a type of bearing with specific structural and application characteristics. They are mainly used to withstand heavy loads and impact loads. They are widely used in metallurgy, rolling mills, mining, petroleum, papermaking, cement, sugar pressing and other industries.

INA roller bearings mainly include the following types:

Support type rollers: These roller bearings have thicker outer rings and are suitable for applications such as cam drives, bed guides, conveying equipment, linear guide systems, etc. They can withstand high radial and axial loads, especially axial loads caused by slight misalignment defects, skewed operation or short-term impacts.

Bolt type rollers: These rollers are similar in design to support type rollers with axial guidance, but use large-section support bolts instead of inner rings. The bolts have mounting threads and most of them have hexagonal sockets at both ends. They are suitable for occasions where the outer ring surface needs to be adjusted to achieve ideal contact.

Ball bearing rollers: These rollers are similar in design to deep groove ball or angular contact ball bearings, with thicker outer rings and crowned outer surfaces. They can withstand high radial loads and bidirectional axial loads. They are usually sealed types and suitable for applications with low noise requirements. INA roller bearings are widely used in the following fields: Metallurgy: Used to withstand heavy loads and impact loads. Rolling mill: Provides stable support and load bearing capacity during rolling. Mining: Suitable for high-load operating environments in mining equipment. Petroleum: Provides reliable support in oil extraction and refining equipment. Papermaking: Provides stable support in the guide rail system of papermaking machines. Cement: Widely used in conveying and mixing equipment in cement production lines. Sugar pressing: Used in the transmission and support system of sugar pressing machines.

As a cornerstone of the Schaeffler Group’s power transmission portfolio, INA Roller Bearings deliver unmatched performance in applications demanding maximum load capacity, shock resistance, and space efficiency. With 75+ years of German engineering excellence, INA specializes in compact, integrated roller bearing systems that redefine reliability in mining, construction, robotics, and heavy machinery.

Engineering Innovations

Space-Optimized Designs

Needle Roller Advantage:

4:1–10:1 length/diameter ratio vs. 1:1 for ball bearings

50% thinner cross-sections (e.g., INA RNA 4904: OD 32 mm × H 4 mm)

Integrated Mounting Features:

Eccentric collars (Y-bearings)

Flanged housings (sleeve bearings)

Advanced Material Science

Cronidur® 30 Steel:

Corrosion Resistance: 2,000-hr salt spray (ISO 9227)

Fatigue Strength: 1,200 MPa

Hybrid Ceramic Rollers:

Si₃N₄ rollers for +50% speed and electrical insulation

Why Choose INA Roller Bearings?

✅ Space Optimization – 40% smaller than competitive designs
✅ Extreme Load Capacity – Up to 1,800 kN dynamic load
✅ Smart Monitoring – Industry 4.0-ready predictive maintenance
✅ Global Certification – ISO 9001, IATF 16949, AS9100D

Conclusion: Redefining Durability in Demanding Applications

INA Roller Bearings transform industrial equipment performance through:

60% longer service life in mining crushers

Zero unplanned downtime in automotive assembly lines

Nanometer-level precision in medical robotics

Specify INA Roller Bearings Today—Where German Engineering Meets Uncompromised Load Capacity.

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Cylindrical Roller Bearings

INA cylindrical roller bearings are an important mechanical component with a variety of models and characteristics suitable for various industrial applications. The following is a detailed description of INA cylindrical roller bearings: ‌Strong radial load capacity ‌: The rolling elements of cylindrical roller bearings are in line contact with the raceway, which allows them to withstand large radial loads ‌ ‌ Low friction coefficient ‌: This design makes the bearings have less friction when running at high speeds, suitable for high-speed rotation occasions ‌ ‌ Diverse structures ‌: Depending on whether the ring has a flange, it can be divided into single-row cylindrical roller bearings (such as NU, NJ, NUP, etc.) and double-row cylindrical roller bearings (such as NNU, NN, etc.) ‌ ‌ Separable structure ‌: The separable design of the inner and outer rings facilitates installation and disassembly,

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Needle Roller Bearings

INA needle roller bearings are a type of bearing based on modular design, the basic element of which is the needle roller, which is gradually combined with components such as cages, stamped outer rings, inner and outer rings and seals to form a series of bearings that meet a wide range of engineering and technical needs. Low wear design: INA needle roller bearings have low wear characteristics, which makes them perform well in long-term operation and reduces maintenance requirements. High transmission life: These bearings use high-quality materials and precision manufacturing processes to ensure high transmission life and good pressure resistance. Wide range of applications: Due to their modular design, INA needle

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Axial-Cylindrical Roller Bearings

INA axial-cylindrical roller bearings are a type of bearing product under the INA brand of the Schaeffler Group, mainly used to bear large radial loads and medium axial loads. This type of bearing is particularly suitable for situations where the shaft is offset or tilted. The spherical raceway design of the outer ring realizes automatic self-alignment, allowing the inner and outer ring axes to tilt relative to each other by 1° to 2.5°. Structure and design features The core structure of INA axial-cylindrical roller bearings includes a spherical raceway design of the outer ring, and the inner hole is divided into two forms: cylindrical and conical. The taper of the conical inner hole is 1:12 or 1:30. In order to enhance the lubrication performance, the outer ring of the bearing is equipped with an annular oil groove and three evenly

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Axial Needle Roller and Cage Assembly

When extreme axial loads meet severe axial space constraints, INA Axial Needle Roller and Cage Assemblies emerge as the ultimate engineering solution. These specialized components represent the pinnacle of compact thrust bearing technology, designed to support very high unidirectional axial loads in applications where radial space is abundant but axial space is critically limited. Part of the Schaeffler Group's renowned INA brand, these assemblies deliver unparalleled load density and reliability where traditional thrust bearings simply cannot fit.

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Axial-Angular Contact Roller Bearings

INA Axial-Angular Contact Roller Bearings ‌are specially designed bearings that combine the features of angular contact ball bearings and roller bearings. They are capable of carrying both radial and axial loads and are suitable for high-speed and high-precision applications. INA Axial-Angular Contact Roller Bearings consist of solid inner and outer rings, balls and cages. The inner and outer raceways are offset from each other in the axial direction of the bearing and have self-aligning capabilities. These bearings can be open or sealed. Open bearings have cut grooves on the outer ring for seals or dust

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Axial-Needle Roller Bearings

INA Axial-Needle Roller Bearings are a special type of bearings that are primarily designed to carry axial loads. The design features of these bearings include a slender needle roller and cage assembly and are typically used where radial space is limited. They typically mate directly with the journal surface and housing bore surface to ensure adequate load capacity and operating performance without an inner ring. INA Axial-Needle Roller The main structural features of the bearings include: ‌Slender needle rollers: The needle rollers have a small diameter and a long length, usually with a diameter D≤5mm and a length-to-diameter ratio L/D≥2.5. This design makes the bearings more compact in radial structure.

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