Timken LM12749/10 Tapered Roller Bearing

Applications - Wheel Hubs and Industrial Systems

The Timken LM 12749/10 tapered roller bearing 21.98x45.23x15.49 mm is designed for applications where combined radial and axial loads must be managed with precision. This bearing is widely used in automotive wheel hubs, trailer axles, agricultural machinery, gearboxes, and heavy-duty drive systems.

Its tapered roller geometry ensures accurate shaft positioning and stable load transfer, making it ideal for dynamic assemblies exposed to variable forces. When installed in pairs, it supports full axial control and enhances rigidity of the complete bearing unit within a properly machined bearing housing.

Advantages - Load Capacity and Operational Reliability

Manufactured by Timken, this tapered roller bearing offers proven performance in demanding environments. Compared to a standard ball bearing, the tapered design provides superior support for combined loads and better distribution of stress along the raceways.

Precision-ground rollers and raceways reduce friction and vibration, contributing to high durability and extended service life. The LM12749/10 is engineered for stable operation under continuous load, making it suitable for both automotive and industrial applications where reliability and dimensional accuracy are critical.

Technical Data

• Designation: LM12749/10

• Brand: Timken

• Type: Single row tapered roller bearing

• Inner diameter: 21.98 mm

• Outer diameter: 45.23 mm

• Width: 15.49 mm

• Load capacity: Radial and axial loads in one direction

• Application: Automotive hubs, machinery, industrial systems

Main Description

The Timken LM12749/10 tapered roller bearing is a precision-engineered component designed for assemblies requiring controlled axial preload and consistent radial load capacity. Its tapered roller configuration increases the contact area between rolling elements and raceways, resulting in improved strength compared to many standard bearing solutions.

This bearing is commonly applied in wheel hub systems, transmission units, and industrial drive mechanisms. Proper installation and lubrication allow the LM12749/10 to deliver smooth rotation, reduced vibration, and long-term operational stability.

Unlike a typical ball bearing, a tapered roller bearing manages axial forces more efficiently, making it the preferred choice for systems exposed to fluctuating loads. Integrated within a correctly selected bearing housing, it forms a robust bearing unit capable of maintaining alignment and mechanical integrity even under demanding service conditions.

For maintenance departments, distributors, and OEM customers, the LM12749/10 represents a technically reliable solution that minimizes downtime and ensures consistent performance in professional environments.

FAQ - Frequently Asked Questions

What is the difference between a tapered roller bearing and a ball bearing?
A tapered roller bearing handles combined radial and axial loads more effectively than a standard ball bearing.

Is LM12749/10 suitable for wheel hubs?
Yes, it is widely used in automotive and trailer wheel hub assemblies.

Can this bearing support axial loads?
Yes, it supports axial loads in one direction and radial loads simultaneously.

Should tapered roller bearings be installed in pairs?
In many applications, two bearings are mounted in opposition to control axial movement.

Does this bearing require lubrication?
Yes, correct lubrication is essential for long service life and optimal performance.