INA NK 38/30-XL 38x48x30 Needle Roller Bearing

Applications

Advantages

Technical Data

Main Description

The INA NK 38/30-XL 38x48x30 needle roller bearing is a precision-engineered component designed for demanding industrial and automotive use, especially where radial space is limited and high load capacity is essential. This single-row, open-type needle roller bearing - part of the “XL” series - is manufactured without an inner ring, allowing the shaft to act as the raceway, thereby reducing radial space and improving running accuracy.

Key features and synonyms: needle roller bearing, compact bearing, high-load roller bearing, radial load bearing, industrial bearing. The design ensures excellent load distribution, minimal friction and extended service life.

Applications: The NK 38/30-XL is ideal for use in transmissions, gearboxes, pump drives, conveyor systems and other industrial machinery where efficient compact design and high durability are required. It is also suited for automotive drive components and powertrain modules. Because it lacks an inner ring, it is best applied when the shaft is hardened and ground to serve as the bearing raceway.

Technical benefits:

• Internal diameter (d): 38 mm

• Outer diameter (D): 48 mm

• Width (B): 30 mm

• Designed for high radial load capacity: basic dynamic load rating Cr ~43 kN, static rating C0r ~76 kN.

• Limiting speed: up to approx. 12 000 rpm.

• Open bearing design allows for lubrication flexibility and maintenance access.

Synonyms and related terms: łożysko igiełkowe, compact needle bearing, radial roller bearing, high-load bearing, industrial bearing unit.

By choosing the NK 38/30-XL, you ensure a high-precision, high-durability bearing solution with minimal radial envelope — an efficient choice for space-constrained assemblies with significant radial load demands.

FAQ

Q1: Why choose a needle roller bearing without inner ring?
A1: A bearing without an inner ring allows the shaft to serve as the raceway, reducing radial space and improving rigidity and accuracy. It is particularly effective for compact designs.

Q2: What shaft surface quality is required?
A2: Since the bearing lacks an inner ring, the shaft must be hardened and ground to provide a raceway compatible with the needle rollers.

Q3: What is the typical loading environment?
A3: This bearing is suited to high radial loads, moderate speeds and where axial loads are low or handled separately.

Q4: Can this bearing be used in automotive applications?
A4: Yes, it is ideal for gearboxes, transmissions, pump drives and other automotive systems where compact bearing design and high durability are critical.

Q5: What maintenance considerations apply?
A5: Use appropriate lubrication and ensure regular inspection for wear. The open design facilitates maintenance access.